1918] Pupa; of Common Sphingidce 415 



genus differ remarkably from each other. The adults have very 

 much in common and, if separated, Rothschild and Jordan 

 remark that it would necessitate a genus for each species. The 

 pupcC of two of these species, which fall in the same division of 

 the key by Rothschild and Jordan, are remarkably alike, while 

 the third species differs markedly in the spiracular furrows. 

 Since these furrows have proved such valuable aids in the clas- 

 sification, the species have been separated on this basis — 

 amyntor and undulosa remaining in the genus Ceratomia, 

 catalpce being placed under the genus Daremma. These are the 

 only two genera known in this region with bodies of normal 

 shape, having a deep spiracular furrow on each of the movable 

 segments and without a maxillary loop. The body is typically 

 sphingiform with the labrum visible in ventral view. The color 

 is chestnut brown. The maxillae are slightly swollen at the 

 proximal end, and extend at least two-thirds of the distance to 

 the caudal margin of the wings. The tibia of the prothoracic 

 leg is slightly swollen and the femur is not exposed. The 

 antennas are indistinctly transversely striate and sHghtly 

 roughened by minute tubercles which are more numerous at the 

 proximal end. The abdominal segments are punctate, and often 

 show distinct annulets. There are two spiracular furrows 

 present, the inner one much deeper. The cremaster is somewhat 

 triangular, longer than broad and sometimes ends in a sharp 

 spine, although it is usually slightly bifurcate. 



The two species of this genus resemble eadh other very 

 closely in size and general appearance. They may be separated 

 as follows: 



a. Maxillae normally reaching the caudal margin of the wings, occasionally- 

 overlaid by the wings at the distal end; mesothorax with the scar of a larval 

 horn on &ach side of the meson near the middle of the segment. . . .C. amyntor 



aa. Maxillae never reaching the caudal margin of the wings, usually two-thirds 

 of their length; mesothorax never with scars of larval horns. . . C. undulosa 



Ceratomia undulosa Wlk. 



Appendages mostly transversely striate; all except the wings 

 appearing polished ; head and thorax with coarser, irregular sculpturing, 

 appearing dull; abdominal segments thickly, usually finely punctate, 

 the punctures confluent on the first seven segments, larger and distinct 

 on the remainder; annulets showing plainly in some individuals, but 

 scarcely visible in others; maxillag slightly swollen and deeply striate 

 at the proximal end, extending for about two-thirds the length of the 

 wings; spiracular furrows equal in length; scar of caudal horn smooth, 



