290 



a swarm of these caterpillars just hatched. The eggs were laid on the 

 under side of the leaf, forming a broad patch an inch in diameter. On the 

 23d examined the swarm again ; the caterpillars were a quarter of an incli 

 long. The little black dorsal tufts very visible, though small; the other 

 hairs thin, and permitting the skin and tubercles to be easily seen. Tlie in- 

 sects were all together, as thick as possible, side by side on the lower surfece 

 of a leaf. They had eaten all the parenchyma of the terminal leaves of the 

 twig, leaving only the veins and intervening reticulations. They had spun 

 a few threads, forming a very slight and hardly conspicuous web on the 

 leaves and twig, probably in moving about, and not for a shelter. "When 

 first found these caterpillars were mistaken for Hyplmntria texlor, a cir- 

 cumstance which tends to show that these species should stand near each 

 other in a natural an-angement. 



Lophocampa maculata Ilarr. [PI. iii, fig. 9.] 



Larva found on the black walnut, Aug. 15, 1828. Feeds also on the ash 

 and oak, on which I found them Sept. 25, 1840. On ash, Sept. 10, 1840.- 



Body blackish, or gi-eenish black above, pale or whitish beneath. Head 

 deep, shining black, lip and base of palpi white; feet and prolegs pale 

 ferruginous or luteous. Each segment has twelve tubercles arranged al- 

 ternately in two transverse series, which furnish radiated bunches of barbed 

 hairs, Avhich are dirty yellow or brownish when the caterpillar is half 

 grown, but which, after the last moult, become cinereous; the dorsal series 

 converge, and are brownish at tips, and truncate. Second segment with 

 two large and distinct, and four smaller, indistinct, white plumes, and two 

 black ones extending over the head; third segment with a lateral white, 

 and two dorsal black plumes; eleventh segment with two dorsal black 

 plumes. Length when fully grown, one and a half in(;lies. 



ILair on the twelfth segment longer than the others. The caterpillar de- 

 presses its head, and hunches the four or five hind segments when at rest. 



Cocoon Aug. 15, 1828. Oblong oval, composed of hairs from the body, 

 connected by a few silky fibres. The perfect insect was not obtained. 



Lophocampa tessellaris Sm.-Abb. 



Sept. 4, 1835. On the buttonwood. Body pale yellow, with dusky 

 tubercles, giving origin to truncated fascicles of divaricating hairs of a pale 

 yellow color; the dorsal series erect and darker; the lateral ones spreading. 

 On the second segment two long pencils of ferruginous or tawny hairs, 

 beneath which on the first segment are four shorter pencils of white 

 hairs; third segment with two long, fen-uginous pencils, and two shorter, 

 white ones at the sides; antepenultimate segment with two long, white 

 pencils; head clear tawny; body beneath naked, bluish white, with a tinge 



