72 INDEX TO MISSOURI ENTOMOLOGICAL REPORTS. 



on the elytra are quite distinct and conspicuous on two specimens, leas so on one, and 

 entirely obsolete on the other. 



Larva, (Fig. 14 a) White with back arched Lauiellicorn-fashion. Head gamboges 

 yellow, glabrous, with some faint transverse striatious above mouth ; mandibles rufou- 

 tipped with black; labrum emargiuate, and with palpi, pale. A faint narrow dorsal 

 vasculer line. Legs replaced by fleshy tubercles. Length 0.20 inch [=5> m ] when 

 stretched out. [Third Rept., p. 44. Fig. 14. 



Say's generic name Tyloderma having- priority over Schonherr's Anal- 

 cis, the name of this insect becomes Tyloderma fragarm. 



LEPIDOPTERA. 



^EGKRIA. RUBI, N. Sp. Imago. Expanse, $ , 1.00 [inch=25 ram ] ; 9, 1.25 inch 

 [=31 mm ]. Front wings transparent, with a broad costal border extending half the 

 width of wing at base, a narrow discal spot, and more or less of the tip dull-ferrugi- 

 nous; the inner border, the inner longitudinal vein, the intermediate space toward 

 posterior angle, and sometimes its whole length, of the same color; veins brownish 

 within and black without the discal spot. Hind wings perfectly transparent, or rarely 

 with a few sparse ferruginous scales; the transverse discal vein pale, the others pale 

 at base, but black toward extremities ; costa narrowly golden-yellow, becoming darker 

 toward apex. Fringes dark-brown, those of hind wings appearing darkest by virtue 

 of a dark wing border. Under surface somewhat paler. Abdomen stout, with a very 

 slight anal tuft in 9 ; a stouter one in $ . Antenme blue-black, not enlarging toward 

 tip, quite pectinate in $ . Palpi, a narrow ring around neck, the sides of the collar, 

 a broad band curving across tegulte and around the base of wings, a faint line across 

 middle of thorax, two faint longitudinal lines between it and collar, legs, except outer 

 base (sometimes whole length) of femora and tibia}, hind third of abdominal joints, 

 and a dorsal and lateral series of abdominal tufts or patches (the dorsal ones, especially 

 on 3d and 7th joints, most persistent and conspicuous) all golden-yellow : the rest of 

 body black. The orbits are of a somewhat paler-yellow, and the face either gray or 

 bluish. 



<? differs from 9 in the darker color of primaries, the narrower fringe of secondaries, 

 the narrower ferruginous spot at apex of primaries, the more tufted abdomen, the 

 broader and darker anal tuft, and the pectinate anteunye. 



Described from 6 $ 's, 6 9 's, brod from Eiibm. Approaches nearest to Troclnlium 

 marginatum Harr., and T. tibiale Harr.,* from which it differs in the thoracic marks 

 and the abdominal tufts. 



Larva Length 0.90-1.10 inch [=22.5-27.5 m '] ; diameter 0.18 [ = 4. 5 mm ]. Color 

 pale-yellow. Head dark-brown, with a few whitish hairs ; mandibles black, the other 

 trophi paler. Cervical shield horny, pale-brown. Each joint with 8 pale, shiny pilif- 

 erous spots, transversely arranged on 2, 3 and 12 ; the dorsal 4 quadrangularly arranged 

 and the lateral 2 interrupted by stigmata on all the others. Thoracic legs slightly 

 tinged with brown ; prolegs, with the hooklets dark. Several specimens examined. 

 [Sixth Rept., p. 113. Fig. 30. 



ACRONYCTA POPULI, N. Sp. Larva Length 1.50 [inch, = 37 uim ]. Color yellowish- 

 green, covered with long soft bright yellow hairs which spring immediately from the 

 body, part on the back, and curl round on each side. On top of joints 4, 6, 7, 8 and 

 11, a long straight double tuft of black hairs, those on 7 and 8 the smallest. Head 

 polished black with a few white bristles. Joint 1 with a black spot above, divided 

 longitudinally by a pale yellow line, giving it the appearance of a pair of triangles. 

 Joint 2 with two less distinct black spots. Thoracic legs black; prolegs black with 

 brownish extremities. Venter greenish-brown. Described from many specimens. 

 When yonug of a much lighter color, or almost white, with the black tufts short but 



* Silliman's Am. Journ. of Sc., XXXVI, p. 309 (1839). 



