Packard.] l^" [March 17, 



tubercles. The subdorsal one is much longer and forked, wliile the 

 two dorsal ones are very long and slender, about as long as the head is 

 broad and deeply forked, each fork bearing a bristle. TJie two dorsal 

 tubercles on the second and third thoracic segments are enormously long and 

 very slender, being about half as long as the body. They are deeply 

 forked, each fork long and slender, and bearing a long bristle. The 

 tubercles on abdominal segments 1-7 are small and short, of nearly 

 equal length, simple except those of the iiifraspiracular row, which 

 are deeply forked. The single median tubercle on the eighth abdominal 

 segment is remarkably long and slender, about two-thirds as long as the 

 thoracic ones. There is also a single median forked tubercle on the ninth 

 segment, not half as long, liowever, as the one directly in front. The 

 suranal plate bears at tJie end two long fioe-branched piliferons tubercles. 

 All the tubercles are of nearly the same color as the body, the five long- 

 est ones, however, a little brownish near and at the end. 



The four middle pairs of abdominal legs are shining black externally on 

 the outer half; otherwise they are concolorous with the body. 



The following description is drawn up from some larvae at the end of 

 Stage I, living October 9 or 10 and reared by Mr. Bridgham : they were 

 about 7 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-J'ellow ; nearly twice as 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 ochreous. The prothoracic segment is very broad 

 and flaring 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 sub- 

 dorsal spines are a liule less than half as long and large as the dorsal 

 ones. The dorsal seccmd 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 black spines ; the two dor- 

 sal 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 obliquely upward. 



The spines of the next row outside (subdorsal) 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. 



