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results 1-20 of 65 item(s)  page 1 of 4 : ( <<  1  2  3  4  >> ) :: previous : next
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Elm Leaf Beetle and Bag or Basket Worm : Elm Leaf Betle (Galerucella luteola (Muller) 1.Cluster of eggs;
1. Elm Leaf Beetle and Bag or Basket Worm : Elm Leaf Betle (Galerucella luteola (Muller) 1.Cluster of eggs; 1a. Side view of single egg,; 2. Recently hatched larva or grub; 3. Full grown larva or grub; 4. Pupa; 5. Overwintered beetle; 6. Fresh, brightly colored beetle; 7. Leaf showing eating of larvae or grubs and a few holes eaten by beetles, eggs in clusters, cast larval skins and full grown larvae; 8. Leaf nearly skeletonized by grubs of larvae and on it three cast larval skins; 9. Leaf showing holes eaten by beetles.
Bag or Basket Worm (Thyridopterys ephemeraformis Haworth): 10, Bag or larval case as it passes the winter; 11. Same as preceeding but cut open to show the pupal case and the eggs; 12. Several eggs; 13. Recently hatched larva; 14. Cases of young larvae on twit. Notice that the dark ones are on the dark bark and the light ones on the green bark; 14a. Leaf eaten by young larvae; 15. Older larvae in their bags which are ornamented with pieces of leaves, one is on the leaf, another hanging from the edge and a third dangling by a thread; 16. Full grown larva removed from its case; 17. Full grown larva walking with its case; 18. Male pupa; 19. Female moth; 20. Male moth with wings spread; 21. Female pupa; 22. Bag of male hanging from a leaf and with the empty pupal case protruding from its lower extremity.... The leaf in front of the bag shows the work of half grown larvae
Sepedon and Tetaoncera : Sepedon fuscipennis Loew.: 1. Larva, dorsal view; 2. Larva, lateral view; 3.
2. Sepedon and Tetaoncera : Sepedon fuscipennis Loew.: 1. Larva, dorsal view; 2. Larva, lateral view; 3. Puparium, dorsal view; 4. Puparium, lateral view; 5. Open puparium; 6. Seed floating which the puparium simulates; 7. Imago, dorsal view; 8. Imago, lateral view.
Tetanoccera pictipes Loew: 9. Larva, dorsal view; 10. Larva, lateral view; 11. Puparium, lateral view; 12. Puparium, dorsal view; 13. Imago. dorsal view; 14. Imago, lateral view
Simulium Society: 1. Two imagos of hydropsyche; 2. Imago of hydorpsyche; 3. Larva of hydropsyche; 4.
3. Simulium Society: 1. Two imagos of hydropsyche; 2. Imago of hydorpsyche; 3. Larva of hydropsyche; 4. Pupal case of hydropsyche; 5. Imago of roederiodes juncta; 6. Larva of Roederiodes juncta; 7. Pupa of Roederiodes juncta; 8. Pupa of Roederiodes juncta in an habitual position in the abandoned pupal case of Simulium venustum; 9. Egg mass of S. Venustum and two females ovipositing; 10. Pupae, empty pupa skins, and pupal cases of s.venustum; 11. Larva of S.venustum; 12. Male imago of Leuctra tenella, dorsal view; 13. Imago of Baetis pygmaea, lateral view; 14. Imago of Baetis pygmaea dorsal view; 15. Imago of Heptagenia pulchella; 16. Nymph of Heptagenia pulchella; 17. Pupal cases of hydropsyche sp.? in situ; 18. Pupae of Simulium venustum, in situ; 19,20. Larva of S.venustum in situ
Solea variegata : Larva of Thickback Newly hatched, April 24, 1889... Pigment as seen by reflected light.
4. Solea variegata : Larva of Thickback Newly hatched, April 24, 1889... Pigment as seen by reflected light. yk: yolk (1); Solea variegata : Larva...two days after hatching, April 23, 1889... Pt, pectoral fin; ht, heart (2); Pleuronectes flesus : Larva of flounder (Pleuronectes flesus) two days after hatching, February 20, 1889, from egg artificially fertilised (3); Pleuronectes flesus : Larva...six days after hatching, February 24, 1889...; same magnification (4); Pleuronectes flesus : Young flounder taken in Mevagissey Harbour, April 2, 1889; drawn April 5.... (5)
Elm Borers and Elm Bark Louse : Elm Borer (Sapreda tridentata Oliv.). 1. Larva or grub within its burrow
5. Elm Borers and Elm Bark Louse : Elm Borer (Sapreda tridentata Oliv.). 1. Larva or grub within its burrow just under the bark; 1a, Larva or grum extended; 2. Pupa within its cell just under the bark; 3. Burrows of the grub as exposed after removal of the bark; 4. Adult beetle.
Elm Snout Beetles (Mardalis): 5. Adult of Magdalis armicollis Say; 6. Adult of magdalis barbita Say; 6a. Side view of same; 7. Larva of Magdalis barbita, side view; 8. Pupa of Magdalis barbita within its oval cell just beneath the bark; 8a Empty pupal case of Magdalis barbita; 9. Burrows of Magdalis barbita as exposed after removal of the bark; 9a. Holes in the bark through which the beetles escape; 9b. Showing how bark is loosened by the burrows of this insect.
Elm Bark Louse (Gossyparia ulmi Geoff): 10. Group of partly grown bark lice as they appear in the early spring; 11. Group of male cocoons; 12. Group of male cocoons; 13. Group of females; 14. Female; 15. Recently hatched young; 16. Mature female; 16a, Mature females on a twig; 17. Pesudimago or wingless male; 18. Winged male.... Note also the long, white, anal filaments
Stages in the development of the larva of Terebratulina septentrionalis... The youngest larva has
6. Stages in the development of the larva of Terebratulina septentrionalis...
The youngest larva has two segments, a third then appears, the larva then fixes itself, and the second segment folds over the first and develops bristles round its edge.
Veligers of Dentalium entalis L.: A, longitudinal section of a larva, 14 hours old; B, Larva of 37 hours;
7. Veligers of Dentalium entalis L.: A, longitudinal section of a larva, 14 hours old; B, Larva of 37 hours; C, longitudinal section of larva of 34 hours; m, mouth; v v, velum
Caddis Flies: 1. Dorsal view of larva of Molanna cinerea Hagen; 2. Lateral view of larva of M. Cinerea;
8. Caddis Flies: 1. Dorsal view of larva of Molanna cinerea Hagen; 2. Lateral view of larva of M. Cinerea; 3. Lateral view of the pupa of M. Cinerea; 4. Dorsal view of imago of M. cinerea; 5. Accustomed resting position of the imago of M. cinerea; 6. Ventral view of the flat larval case of M. cinerea; 7. Lateral view of larva of POlycentropus lucidus Hagen showing the very long anal prolegs and the absence of gill filaments; 8. Lateral view of pupa of P. lucidus; 9. Dorsal view of imago of P. lucidus; 10. Larval case of P. lucidus; tube composed of sand and silk; the enlargement near the end is two-layered, and contains the pupa; 11. Eggs laid by P. lucidus female on a stick protruding from the water in a breeding cage
Pleuronectes flesus, Young Flounder taken in Mevagissey Harbour, Aporil 2, 1889... pw, pelvid fin (1);
9. Pleuronectes flesus, Young Flounder taken in Mevagissey Harbour, Aporil 2, 1889... pw, pelvid fin (1); Pleuronectes limanda, Larva of dab...new hatc hed, from artificially fertilised egg, March 11, 1889. pt, pectoral fin; yk, yolk (2); Pleuronectes microcephalus, Larva of Merry Sole, March 25, 1889, four days after hatching, from artificially fertilised egg; l, liver; ht, heart (3); Pleuronectes platessa, Larva of Plaice..., February 27, 1889, five days after hatching, from artificially fertilised egg; a, anus; nch, notochord (4); Rhombus laevis, Young brill, taken at surface of water in Sutton Pool, June 1, 1889 (5)
Larva Live orchestra, Close-up
10. Larva Live orchestra, Close-up
Sepedon and Tetaoncera : Sepedon fuscipennis Loew.: 1. Larva, dorsal view; 2. Larva, lateral view; 3.
11. Sepedon and Tetaoncera : Sepedon fuscipennis Loew.: 1. Larva, dorsal view; 2. Larva, lateral view; 3. Puparium, dorsal view; 4. Puparium, lateral view; 5. Open puparium; 6. Seed floating which the puparium simulates; 7. Imago, dorsal view; 8. Imago, later
Conger Eel : Larva of August 4. The fin fold of this larva is probably represented as too low
12. Conger Eel : Larva of August 4. The fin fold of this larva is probably represented as too low
Larva Hatching from Egg, Larva Removed from Egg-Shell, and Young in Fifth Stage
13. Larva Hatching from Egg, Larva Removed from Egg-Shell, and Young in Fifth Stage
Larva Live orchestra, Scott Summers colophon
14. Larva Live orchestra, Scott Summers colophon
Larva Live orchestra
15. Larva Live orchestra
Larva Live orchestra
16. Larva Live orchestra
Sugar Maple Borer (1. Place where egg was laid, showing exccrement or borings thrown out by borer; 1a.
17. Sugar Maple Borer (1. Place where egg was laid, showing exccrement or borings thrown out by borer; 1a. Another more than normally discolored; 2. Borer or grub in September from egg laid the same season; 3. Nearly full grown borer; 4. Adult or beetle; 5. Hole through which the beetle escaped from the trunk; 6. Sadust or borings packed in burrow. Maple Tree Pruner (Elaphidion villosum Fabr.): 7. Grub or borer in its burrow, a portion of the twig being cut away to show its work; 7a. Small twig with only a thin shell of bark, the wood being nearly all eaten; 8. Pupa in the burrow. the base of both twigs represented has ben nearly eaten off by the larva; 9. Adult or beetle. Cottony Maple Tree Scale Insect (Pulvinaria innumerabilis Rathv.): 10. Active or recently hatched young; 11. Adult females, many eggs can be found in the woolly masses; 12. Leaf with many young scales on its under side.
Leopard Moth (Zeusera pyrina Fabr.): 1. Empty pupal case from which female moth has emerged; 2. Female
18. Leopard Moth (Zeusera pyrina Fabr.): 1. Empty pupal case from which female moth has emerged; 2. Female moth with wings folded; 3. Male moth with wings expanded; 4. Nearly full grown caterpillar, probably a female; 5. Male pupa in its burrow; 6. Exit hole covered by a loose piece of bark which the pupa will push off as it partly emerges; 6a. Another; 7. Hole made for the pushing out of excrement and then closed by a silk web; 8. Same as above, but in use with particles of excrement dangling by silken threads; 9. Work of caterpillar a preceding season; 10. Work of caterpillar the present season; 11. Young twig eaten by larva, point of entrance at a. Maple borer (Sesia acerni Clem.): 12. Hole from which pupal case has fallen; 13. Bark nearly eaten through ready for the pupa to push out; 14. Empty pupal skin; 15. Two cocoons as spun; 16. Moths expanded and at rest; 17. Excrement of caterpillars; 18. Caterpillar in its burrow
Larva of Conger-eel (Leptacephalus conger), called Leptocephalus marrissi
19. Larva of Conger-eel (Leptacephalus conger), called Leptocephalus marrissi
Larva of Common Eel, Anguilla chrisypa (Rafinesque), called Leptocephalus grassii
20. Larva of Common Eel, Anguilla chrisypa (Rafinesque), called Leptocephalus grassii
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