1893.] iOO [Packard. 



yellow ; those on the sides below pure snow-white ; behind the front 

 edge are four small but distinct white warts, two in the middle. 



The second and third thoracic segments each with two widely sepa- 

 rated pairs of horns, not quite so thick as the caudal horn, eacli about 

 two-thirds as long as the segments bearing them are wide ; they are 

 slightly recurved and scattered over them are conical while tubercles 

 which are irregular and blunt at the end ; they are yellowish at base, near 

 the middle becoming dark pink and at tip reddish black-brown. On tlie 

 front edge of the second tlioracic segment between the horns is a row of 

 three conical sharp tubercles, with a similarand some minute ones on each 

 side, while on the third segment are two similar white warts. 



Across the dorsal side of ttie abdominal segments 1-7 are two rows of 

 white, sharp, conical tubercles; two of those on the front edge of each 

 segment being longer and sharper than the others and directed backwards. 

 On these same segments (1-7) is a third set of curious tubercles, mostly 

 large conical and black internally, but on the outside shining opalescent 

 pearl or silvery white, and resplendent, glittering brightly by lamplight. 

 Of these curious spines those on the first abdominal segment are smallest, 

 and those on segments 4-6 are largest, being about one-third as long 

 as the caudal horn ; the pair on segment 6 being the largest. The "cau- 

 dal horn" on the eighth segment is large, with a few white tubercles, 

 those at the end of the horn being reddish ; the tip is slightly forked, 

 there being two minute tubercles ; all those on the sides of the horn bear 

 a short fine hair. In the middle of the ninth abdominal segment and in a 

 position homologous with the caudal hoiu, is a minute, sliort, median, 

 ■white wart, which is reddish at the base. The suraual plate and hind 

 legs are very large, the surface rough and heavily warted, especially on 

 the edges ; the lower edge of the anal legs and suranal plate are inter- 

 rupted with black. The eighth and ninth segments and base of the 

 suranal plate are a little wider than the middle abdominal segments. 

 The suranal plate is a little longer than wide, subacutely triangular, liie 

 tip forked and ending in two rather large tubercles, which are greenish 

 at the end, blackish at base, with a little transverse median black stripe 

 in front. 



The stigmata are deep flesh colored, with a slit in the middle, whitish, 

 especially at the end. The stigmatal line along the side of abdominal 

 segments 1-8 is whitish, edged above with purple, and still above washed 

 irregularly with livid greenish blue, while from the eighth segment to the 

 tip of the suranal plate the line is straw-yellow. Below, near the base of 

 the feet, is a lateral row ot sharp black spines ; there are several on tbe 

 sides of the thoracic segments and one rather large one under each 

 spiracle, with smaller sharp ones below. The thoracic legs are black ; 

 the middle abdominal legs large, greenish, with two or three alternating 

 rows of sharp black spines near the base, and also with fine white tuber- 

 cles like those on the rest of the body. Along the middle of the under 

 side of the body the skin is immaculate green. 



