16(3 



MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. 



"iS<rt//e ///. — Ileail narrowing toward vertex, witli an angle between tlie front and sides; 

 clypeus ratber large; futures evident, tlie median depressed at vertex. J>ody cylindrical, abdonnnal 

 segment S enlarged dorsally, sloping oil' rapidly to segment 9, which is small; anal I'eet used, 

 about the same size as the other abdominal ones. On abdominal segment 2 a dorsal fleshy hump, 

 low, conical, nutant; a very slight one also on alxlominal segment 3. Color lilac-white, diffusely 

 marked along the sides with a darker shade. A brownblaelc dorsal band narrowing out and 

 disappearing on abdominal segments 4-(>, but distinct again posteriorly. Thoi-acic feet dark, a 

 iaint white stigmatal line. 



••tStdi/c IV. — Head higher than protliorax, concolorous with body, with a |iuri)lish ))and from 

 the paliii narrowing to the vertex of each lobe. Some nearly concolorous niottlings, especially 

 laterally jiosteriorly. Body lilac-white; the daikcr lateral streaks become obli<|ue subdorsals, but 

 are faint, as is the white stigmatal line. Dorsal band continuous, but very narrow on abdominal 

 segments 4-0, velvety brown l)iMrk on tlie nutant Inunp on abdominal segment ;.*, reddish on the 

 hump on S. Venter heavily shaded with i)urple-bro\vn. begs all dark; a white line on the one 

 on alidominal segment (i. Tubercles small, concolorous with very line short seta-. Seta i is borne 

 on the hump on the eighth abdonnnal segment, but only on the bases of the horns on abdominal 

 segments 2 and '.'. Altogether similar to the last (fifth) stage." (Dyar.) 



Dr. Dyar has reared the larva, and finds that there are five stages. The widths of the head are 

 (iu the larva examined) 0.5, 1.1, l.C, 2.35, 3.5 mm. 



Larvit before last molt. — Head large, oval, flattened iu front, mirrowing toward the vertex, 

 which is slightly bilobed; the head is wider than the thoracic segments; the body is thickest on 

 the second and third abdominal segments, on each of which is a thick, fleshy, conical, soft tubercle, 

 the apex falling over backward; they may be elevated and somewhat enlarged or dei)ressed, the 



anterior tubercle the larger of the two; the body is much 

 humiicd dorsally on the eighth segment; supraiinal ])late 

 smooth, much rounded; the anal legs sleiuler, not nearly so 

 thick as the other abdominal legs. General color pearly, 

 glaucous, whitish gray, somewhat marbled with brown; head 

 of tlie same color, marbled with frown; a broad, faint, lateral 

 band shaded behind with white. A brown dorsal line extends 

 from b(diind the head to apex of second tubercle on third 

 abdominal s(\gment; theni'e a faint vascular line extends to 

 end of supiaanal plate. The hump on eighth .segment pale 

 rust, yellowish red on sides, deeper above in the middle. A 

 l)ale ])inkish stigmatal line. Length, 20 mm. 

 j\Iature ?«/■(■«.— Length, -10 mm. Does not differ except in size from previous stage. The head 

 is rather square on the sides, narrowing above, and scarcely bilobed above; it is of the same 

 general shai)e as in Schizura and Janas.sa. In this species, instead of a single hump on the first 

 abdonnnal segment, there is a large, high, soft, movable humj) on the second, and which nods 

 backward, besides one a little stouter and shorter on the third. The humps are simple, with no 

 traces of a fork or of bristles, and they are both brownish, of the hue of a dead dry leaf. The 

 very prominent hump on the eighth abdominal segnu'nt bears two slight low tubercles, but no 

 bristles. The anal legs are long and slender, but the planta is well ]U(ividcd with crochets. 

 Underside of body dusky; the pale lilac lateral line sends a branch down the middle of the feet 

 on the sixth abdominal segment. 



I add Mv. Ivhvards's description of the full-fed c;iterpillar: 



■ Heail shito cnlor, inoltlod witli lilark. ami witU a ]iali,' slrijio on rai'li isiilc. Mouth parts with a urci'iiisli tiugo. 

 Body ]iaIo lilac, witli the exception i>l' the eli'vc-nth aud twrlfth se^iiH'iits, which arc dull goldi'ii. The .sevciilh and 

 eiglith scginents have raised proiiiiiiciiccs, whicli arc also gohleu, that of the seventh being the largest. I, literally 

 there are some pale obliiino streaks somewhat similar to those of many Sjihingidic; these do not meet on the back, 

 where there is a taint slate-colored line. Uetween the second and sixth segments, and common to all of these, is ii 

 darker dorsal shade which reappears on the eleventh and twelfth sigiiients. The sjiiracles are white, with a black 

 ring, aud the lower lateral line is paler than the rest of the body. The twelfth segment bears a liiinip. and (he sides 

 of till! eleventh, twelfth, and thirteenth segments are pale brown, mottled with orange. Alulominal legs dull slate 

 color, mottled with black; thor.acic legs black. Length, 55 mm. 



Fio. 6G — End of pupa of Xotoilonta strngula. 

 al, anal legs; cr, the vestigial crema-ster. 



