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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
Insects Affecting Oak : 1. Egg mass of Anisota senatoria Abb. & Sm., on underside of oak leaf; 2. Egg shells of same on partly eaten leaf; 3. Shrunken larvae of same infested by parasite on leaf stalks showing the characteristed feeding of the insect; 4. Nearly full grown larvae of same; 5. Recently hatched larvae feeding side by side and showing the skeletonizing of the earlier stages; 6. Male; 7. Female depositing eggs; 8. Full grown larva of Buck moth, Hemileuca maia Drury; 9. Male of Hemileuca maia Drury; 10. Egg mass of same; 11. Cacoecia fervidana Clem.; 12. Nest of same, composed of partly eaten, curled leaves; 13. Serica trociformis Burm. on leaf; 14. Same; 15. Two spotted tree hopper, Euchenopa binotata Say; 16. Another peculiar tree hopper, Crchasia galeata Fabr; 17. Another tree hopper, Thelia acuminatga Fabr.; 18 Dog day cicata or Harvest fly, Cicada tibicen Linn. in its resting position; 19. Acorn weevil, Balaninus nasicus Say, natural size; 20. Same
Brood-pouch of Thecidium mediterraneum. Part of the wall of the pouch has been removed to show the clusters of larvae.
1. Mouth, overhung by lip.
2. One of the two median tentacles which are enlarged and modified to bear the larvae.
3. Wall of brood-pouch into which the median tentacles are folded.
4. Larva attached to the swollen end of the tentacles.
Spongilla Flies: Climacia dictyona Needham: 1. Imago, lateral view; 2. Imago, dorsal view; 3. Larva, dorsal view; 4. Pupal cases, in situ; 5. One of the same....showing the hexagonal meshes of the outer covering.
Sisyra ambrata Needham: 6. Imago, lateral view; 7. Imago, dorsal view; 8. Two newly formed pupae, lateral and ventral views; 9. Macronychus glabratus Say (Coleoptera : Parnidae) : an associate of the sponge fly larvae, on submerged timbers; 10. Fresh-water sponges (Spongilla ? fragilis Leidy) in situ, witht he sponge fly larvae crawling about over them; 11. Two pupal cases of S. umbrata, showing the closely woven outer covering....
Mulinia lateralis, gray (1); Star-fish about 2 days old, much enlarged, devouring a clam. Outlines of stomach of star-fish can be seen through transparent shell of clam (2): Larva of star-fish, nearly ready to set, in side view; dark bands show position of vibratile cilia; intestine and stomach shaded; five lobes at lower portion of figure are beginning of the five arms (3); Piece of eelgrass with star-fish larvae just undergoing their transformation; two larvae at sides (4); Small specimens of star-fish from seaweed, about the first of July (5-8); ...Average star found upon eelgrass and seaweed, on July 15 (9); Large specimen from car, July 15 (10); From car, July 18, large specimen, 5 mm (11); From car, July 24, large specimen, 8 mm (12)
[Toadfish larvae]: The young are nearly ready to break away
Toadfish: Pinna shell nest, showing tadpole-like larvae
Insects Affecting White Pine : 1. Nearly full grown larva of imperial moth, Basilona imperralis Drury; 2. Masses of the pine bark louwe, Chermes pinicorticis Fitch; 3. Pupal cells of white pine weevil, Pissodes strobi Peck under bark of pine log; 4. Burrows of larvae of same in bark; 5. Portion of dead shoot killed by the insect, showing the circular exit holes, the borings of the insect in upper part and the shrunken area extending down on the affected portion of the twig; 6. Pupal cells of white pine weevil within the wood, showing method of exit and also a few exit holes in the shrunken affected bark; 7. Adult weevil, Pissodes strobi Peck; 8. Leconte's sawfly larvae, Lophyrus lecontes Fitch in resting position, showing below the stubs of devoured foliate; 9. Pine leaf scale insect, Chionapsis furfura Fitch
Birth of the Coralline Larvae (Lacaze-Duthiers)
Sections of Larvae and Spat
Diagram of the method used in experimental hatching of quahaug eggs and rearing of the young larvae at the Wellfleet laboratory. It represents a cross-section of the laboratory, showing a small 1 1/2 horse power gasoline engine (B), connected by a belt with a pump (C), by which salt water is forced from below into a tank (A) situated near the roof. The laboratory is located on a wharf over the water, which enables salt water to be obtained directly from beneath the floor. The inlet of the pump is guarded by a strainer (H), which prevents seaweed entering the pipe. From the tank the salt water is conducted through the laboratory by a large pipe set with small petcocks. From these petcocks pieces of rubber tubing (F) lead to the hatching tubs (E), which consist of half barrels fitted with sand filters (D). The tubs are placed over a sink (G) which carries off the filtered water. By this arrangement a continuous flow of water is established through the hatching tanks.
Fall Web Worm and Spiny Elm Caterpillar: FAll Web Worm (Hyphantria cunea Drury): 1. Cluster of eggs; 2. Dorsal views of full and partly grown larvae and also a lateral view of a full grown caterpillar; 3. Pupa; 4. Pupa; 5. White form of moth in resting position; 6. Spotted form of moth with wings expanded. Examples 2,5, and 6 are on a small web showing within the partly skeletonized discolored leaves and the frass or excrement of the caterpillars.
Spiny Elm Caterpillar (Euvanessa antiopa Linn.): 7. Cluster of eggs on a leaf stem; 8. One egg; 9. Caterpillar feeding; 10. Chrysalis hanging from a leaf stem; 11. Butterfly with wings spread, natural size. The figues of the egg and caterpillar are on a twig of elm representing the characteristic work of the caterpillar
View of interior of a car, showing filter of gravel and sand placed over one of the bottom windows. Arrangement ... for rearing very minute larvae, or those for which screen windows are dangerous. The car is calked tight; water is poured over the top by bucket chains...and its only exit is through this bottom filer
Brule Desolation; Alaska Interior
[A view on the Stickeen Divide; bears, in search of larvae, ripping open decayed logs]
Potamogeton Robbinsii, branch defoliated by larvae of Nymphula sp. (Paraponys). Larval cases
Polydora (Leucodore) ciliata, with ova (1) : Young larvae of Polydora from a photomicrograph (2), Older stages (3-4), Somewhat more advanced (5-9), Egg-cases of polydora (10)
Three successive stages in development of Plaice larvae in the egg
Floating plants of myriophyllum and debris which provide protection for mosquito larvae
Aquatic grass growing along the shallow edge of a pond where it forms protection for mosquito larvae
Showing growth of aquatic grass in corner of pond. Such grass furnishes excellent protection for mosquito larvae
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