1918] Pupce of Common Sphingidce 431 



dorsal and cephalic views. The maxillae extend to the caudal 

 margin of the wings. The antenna are sHghtly elevated along 

 the flagellum, and length and breadth appear equal in both 

 sexes. There is often a small portion of the prothoracic femur 

 exposed, but this is usually so narrow as to scarcely be noticed. 

 The pupae of this genus differ from all the others examined, 

 except Celerio gallii, in having spiracular furrows on two abdom- 

 inal segments, five and six, while the others have them on either 

 one or three segments or not at all. Celerio gallii has short, 

 interrupted ridges separating the furrows. There are four or 

 five long furrows which extend for an almost equal distance 

 dorsad and ventrad of the spiracles. The body is sculptured 

 practically all over the surface, except the scar of the caudal 

 horn which appears poHshed. The cremaster is triangular, 

 longer than broad, coarsely punctured and bears numerous 

 hooks curved caudad with a larger double hook at the distal 

 end. The pup^ of this genus are among the few which are 

 found in cocoons. The larva; drop to the ground to pupate and 

 fasten bits of leaves or other debris together with silk to form 

 the cocoon. The larvae of H. diffinis have been so abundant on 

 snowberry and various bush honeysuckles in Urbana as to be 

 a serious pest. 



It is extremely difficult to separate the pupae of this genus. 

 H. thyshe and H. diffinis are both common species and after 

 rearing hundreds of them I hesitate to attempt a key to separate 

 these two common species. The larvas are very variable as to 

 coloring and often difficult to distinguish on this' account. The 

 pupae of H. diffinis are shghtly smaller, averaging 25 mm., but 

 are so variable in size that this factor counts for Httle. They 

 are not so much excurved ventrally, but this difference is hard 

 to put into exact measurements. The greatest width of H. 

 diffinis averages 7 mm., of H. thyshe 8 mm. The description of 

 H. diffinis will be given, as more specimens have been reared 

 of that species. 



Haemorrhagia diffinis Bdv. 



Color varying from dark reddish brown to brownish black, with a 

 lighter conjunctiva on the movable segments, this difference nearly 

 always visible in alcoholic specimens; body surface dull, somewhat 

 shagreened, the head, thorax and abdominal segments roughened with 

 impressed lines, mostly transverse, the abdominal segments finely, 

 thickly punctate, with the punctures mostly confluent, conjimctivae 



