1893.] -1-4:7 [Packard. 



succeeding segments are of nearly the same size, being nearly one-half as 

 long as the body is thick ; those on the third thoracic segment are unevenly 

 forked and of the same size as those of the sixth and eighth abdominal 

 segments ; those on segments 1-5 being a little smaller ; those on 

 the third thoracic segment are more regularly bifid than the abdominal 

 ones, whicli have the smaller fork lower down. The single median spine 

 on the ninth segment is no larger than either of the two on the eighth 

 segment, and armed with white spinules. The suranal plate is rounded 

 with six black and several white spines, the basal black ones the largest. 

 The skin is of a peculiar blackish pitchy color. Spiracles black. The 

 thoracic and abdominal legs are dark pitchy ; sides of the anal legs red- 

 dish, like the suranal plate. Ho subdorsal or lateral pinkish stripe, like 

 those in A. virginiensis. 



Last Stage. — Length, Si mm. ; of the second thoracic dorsal spines, 

 6.5 mm. The head is of the same color as in the previous stage. The 

 second thoracic spine is ab(Hit as long as the body is thick, and recurved ; 

 the other spines are more curved backwards and downwards than in the 

 previous stage, and their shape is very ditferent, the upper surfiice being 

 smooth, the spinules being collected on the under side ; the usually single 

 large spine being white, and beyond the middle, with smaller abortive 

 spinules on the side ; these spinules are larger on the spines of the eighth 

 and ninth segments; suranal plate reddish, its surface rough, with white 

 piliferous granulations ; near the base is a large black spine on each side, 

 and two black ones of about the same size at the end forming a fork. 

 Spiracles black. Thoracic and abdominal legs pitchy black ; sides of the 

 anal legs reddish. Skin dark, with more numerous white granulations 

 than in the previous stage. 



It is quite different and easily distinguished from A. virginie7isis ; com. 

 pared with this species, the head is of the same size but the color quite 

 different, being dull cherry or Indian red, while that of A. virginiennis is 

 yellowish amber. All the spines are much longer ; those on the back of 

 the second thoracic longer, and those behind two or three times longer ; 

 that on the ninth abdominal certainly tliree times as long as in A. tirginien- 

 sis. The skin is blacker, and thus the granulations are more distinct, be- 

 sides being larger, while A. stigma lacks the subdorsal and lateral pink or 

 flesh-colored bands present in A. mrginiensis.* The spines on the suranal 

 plate are stouter and longer. 



Life History of Sphingicampa bicolor (Harris). 



Dr. H. S. Jew^ett has already {Papilio, ii, 38 and 144) fully described 

 the egg and the larval and pupal stages of this interesting insect, and 

 I have only to add some details omitted by him. My descriptions were 

 drawn up from living specimens, supplemented by examination of the 



* Riley says that the body of A. pellucida is two-striped and that the spines are shorter 

 than in A. sligma. 



