434 Afinals Entomological Society of America [Vol. XI, 



surface. The maxilte reach the caudal margin of the wings. 

 There is never any portion of the prothoracic femur exposed. 

 The antennae are slightly broader on the cephalic half. There 

 is a conspicuous row of large punctures extending along the 

 dorsal cephalic margin of the eighth segment, which has not 

 been noted in any of the other sphingid pupae studied. The 

 scar of the caudal horn is smooth and polished, occasionally 

 showing a small tubercle on each side the meson. 



This genus includes two species in North America which 

 may be separated as follows: 



a. Abdominal segments 7-10 tapering gradually to a point, somewhat triangular 

 in outline; cremaster triangular, bifid at tip A. myron 



aa. Abdominal segments 8-10 rounded abruptly at end of body, almost semi- 

 circular in outline; cremaster a sharp spine scarcely broader at the proximal 

 end A. versicolor 



Ampelceca versicolor Harris. 



Color grayish or coffee color often with a pinkish tinge, sometimes 

 darker in mature pupae, dotted with black, the eye-pieces and spiracles 

 conspicuously black; body rather stout and more cylindrical than is 

 typical in sphingid pupee, rounded abruptly at the caudal end; surface 

 of body dull and roughened with wavy impressed lines, with fine punc- 

 tures on the cephalic margin of each movable segment and around the 

 spiracles; abdominal segments 8-10 coarsely punctate; antennae 

 extending as far caudad as the prothoracic legs; distinct spiracular 

 furrows not present, the region cephalad of the spiracles finely 

 punctate with no indication of ridges ; cremaster 2-3 mm. long, a slender 

 sharp spine, not noticeably wider at the proximal end. Length of pupa 

 35-40 mm., greatest width 10 mm. 



Ampelceca myron Cram. 



Color usually light brown finely dotted with black, the eye-pieces, 

 spiracles and conjunctiva of the movable segments black or dark 

 brown; surface of body dull, roughened with wavy impressed lines, 

 abdominal segments 1-7 distinctly, finely punctate with much coarser 

 punctures on the remaining segments; antennae extending as far 

 caudad as the prothoracic legs ; distinct spiracular furrows not present, 

 but a series of low interrupted ridges are distinctly visible over the 

 spiracles of the fifth segment; cremaster about 2 mm. long, triangular, 

 much longer than broad and slightly bifurcate at tip. Length of jpupa 

 30-38 mm., greatest width 9-10 mm. 



Genus Darapsa Walk, 



The pupae of this genus differ markedly from those of the 

 genus Ampelceca. They are the only sphingid pupa examined in 

 this study excepting Cressonia which have rows of spines on 



