MEMOIRS OF Till-: NATIONAL ACADEMY OF SCIENCES. 121 



eno?'mouj<f 1/ hnuj mid I'l'vy sli'iidci^ beiiiii- about hall' a.s lony as tlic liody. Tlicy arc decplv fiirkcd. 

 each foi-k loiij^- and sUmuIcm-, and l)earin>i- a long- bristlo. The tiiborcle.s on alxluiiiinal seirinontts 

 1-7 ai'o small and .short, of nearly e(iual liMiyth, siniplo except those of the infraspii'ai'ulaf I'ow, 

 which are deeply forked. The sinj;le median tubercle on the eighth abdominal seiiuierit is 

 remarkably lonj;' and slender, about two-thirds as lono- as the thoracic ones. There is also a single 

 iiivdian furlied inhercle on, the ninth segnumtj not half a.s long, however, as the one directly in 

 front. The siiranal plate hears at the end tuw hmg ;fire-l)ranehed piliferous tuhereh's. All the 

 tub(>rcles are of nearly the same color as the body: the five longest ones, however, a little 

 brownish near and at the I'ud. 



The four middle pairs of alxlominal legs are shining black externally on the outer half; other- 

 wise they are concoloroiis with the body. 



The following description is drawn up from .some larvie at the end of stage J, living October 

 9 or 10 and reared by ]Mr. Bridghani; they were about T mm. in length, and had been kept for a 

 number of days, and died before molting. The head is large, full and rounded, smooth and 

 shining honey -yellow; nearly twice a.s wide as the body (actual width, 1..5 mm.), rounded above 

 on the apex; the eyes and mouth parts black; labrum whitish. The body is ocherous. The 

 prothoracic segment is very In'oad and flariiig in front, nearly as wide as the head, bearing ten 

 black spines, of which the two dorsal ones are about as long as the body is thick, each bearing 

 three or four small, .short tubercles, and ending in a long fork, each branch bearing a long seta, 

 which is white at the base. The sul>dorsal spines are a little less than half as long and large as 

 the dorsal ones. The dorsal second and third thoracic horns are very long and large, being 

 nearly twice as long as the middle of the body is thick; the stalks are knotted (not tuberculated) 

 and deeply forked at the end; each fork thick and ending in a seta. Those on the third segment 

 are slightly shorter, with a smaller fork than the two on the second thoracic segment. Each 

 abdominal segment is provided with six l>lack spines; the two dorsal ones about half as long as 

 the body is thick, with two or three minute warts; they are forked at the end. the lower fork 

 small, about as long as the spine is thick, and not bearing a seta, while the other fork or tine is 

 directed oblicjuely upward. 



The spines of the next row outside (su])dorsal) are small and simple, while the lateral row near 

 the base of the legs is composed of branched spines nearly as large as the dorsal ones, and with 

 each branch ending in a long seta. The caudal spine on the eighth abdominal segment is nearly 

 as large as those on the second and third thoracic segments, but with a smaller fork, each ending 

 in a seta. There is a median dorsal spine on the ninth .segment, about one-half as long and large 

 as that on the eighth, with three branches, the two terminal forming an uneven fork. Thei-e is 

 no distinct suranal plate, only a subtriangular flattened area bearing along the edge six black spines 

 of very uneipial size. Around abdominal segments 1-7 is a double, black band, and the lateral 

 and subdorsal spines on these segments are connected by a black band, also inclosing the spiracles, 

 these short bands alternating with long ))ands passing over the liody. The thoracic legs are 

 black; the abdominal legs dull ocherous, with a large, black patch covering the outside. The 

 anal legs are rather large and square, ocherous, the hinder edge pitchy red. 



It mav l)e obser\'ed that the median dorsal spines on the eighth and ninth abdominal seg- 

 ments are forked like those of Iltjperehiria in. 



Stage II. — July 10. 11. Length, 13-15 mm. The head is as wide as the thoracic segments 

 (exact width. 2 mm.); it is chestnut brown, a little darker on the sides above the eyes and on the 

 ch'peal region. The .spines on the prothoracic segment are much as before, Ind xtmitx-r and 

 shorter. The dorsal spines on the second and third thoracic segments are nuich as before, hut not 

 quite .«r; dtephj furled ; they are dusky aml)er wax at the base, and black beyond; they are irregu- 

 lai'ly spinose fi'om base to tip; each folk l)ears a white hair. All fhi i>ther.y>ines are hlact:. The 

 "caudal horn" on eighth abdominal segment is .stouter at base, the trunk with larger, longer, and 

 more numerous >pinules. which end in a l)ristle which is not present in stage I; it is still evenly 

 forked. 



