311 



scattered hairs on the body are whitish, and proceed indiscriminately from 

 the surface, and not from regular tubercles. 



Apatela americana Harr. 



This larva feeds on the elm as well as on the maple ; my specimens were 

 from the elm. 



Body above greenish yellow; head, last segment, feet and all beneath, 

 black ; covered above with diverging fascicles of short yellow hairs, with 

 two long black pencils on the fourth and sixth segments, and one on the 

 eleventh. 



Oct. 1, 1827. Found on the chestnut tree a larva measuring one inch and 

 three quarters in length; of a pale green color, the head and corneous feet 

 polished black ; first three, last two segments and body beneath blackish ; 

 dorsum covered with yellowish hairs ; the fourth and sixth segments with 

 two elongated fascicles of black hairs, and the eleventh segment with one 

 black fascicle. No tubercles. Six true and ten false feet. Demi-cocoon of 

 two coats affixed on one side to the plane on which the insect was placed ; 

 outer coat of coarse texture, interwoven with hairs of the caterpillar; inner 

 coat of closer fabric with fewer hairs. The perfect insect came out July 18, 

 1828. 



Acronycta sagittaria Harr. MSS. [A. occidentalis Gr. and Rob.] 



Sept. 1-10, 184G. Larva on plum and other trees. Habit of a Gastro- 

 paclia. 



Prolegs ten, equal. Head rather large, somewhat cordate, brown, rough, 

 with punctures. Body ash gray, with a dorsal white stripe on each side of 

 back, from the fourth to eleventh segments inclusive. A large blackish 

 wart on the eleventh segment; on the fourth to tenth segments, a transverse 

 oval, black spot with four white tubercles on it, placed in a transverse, curved 

 line, the convexity anterior, the middle tubercles smallest ; two orange 

 dorsal spots on the same black spot, one before and one behind the white 

 tubercles. A single transverse row of tubercles on the first, second and third 

 segments, of an obscure rusty tint; also about four tubercles on each side 

 of each of the other segments. All the tubercles produce a few gray 

 hairs, those near the head and lower side of the body being longest, forming 

 fascicles which nearly conceal the legs. Fore legs brownish black, other 

 legs ash colored. Body beneath ash colored. 



One made a loose coeoon of coarse silk in a box, Sept. 10, 1846. 



A similar larva was found on mountain ash, June 25, 1848, and began to 

 make its cocoon of silk under cover of a leaf, July 7. Winged Aug. 3, 

 1848. Another was winged April 22d, 1848. 



Sejlt. 24, 1847. Larva on cherry tree. Dusky bluish gray, with a 



