1918] PiipcE of Common Sphingidce 425 



thorax. The spiracular furrows are very shallow. The outer 

 furrows are sparsely punctate, while the inner ones are prac- 

 tically obscured by large deep punctures, very close together so 

 as to appear honeycombed, an extension of the punctate area 

 on the dorsal cephalic margin of each movable segment. The 

 cremaster is triangular, scarcely longer than broad and usually 

 very rugose. 



The following key may help to separate these species: 



a. Pupee 35-43 mm. in length; greatest width, 11 mm S. excacata 



aa. Pup^E of smaller size. 



b. Greatest width, 8 mm. or less; body of nearly uniform sculpturing; smooth 

 band along cephalic margin of abdominal segments 5-7, usually sparsely 



punctate or wrinkled S. aslyliis 



bb. Greatest width at least 9 mm. 



c. Spiracles about 1 mm. across S. myops 



cc. Spiracles less than 1 mm. across, usually .5 or .G mm. 



d. Antennae varying in the sexes, those of the female shorter and not 

 extending as far caudad as the prothoracic legs; surface of antenna 

 elevated and either smooth or with one row of minute tubercles. 



S. jamaicensis 



dd. Antennae not varying in the sexes, in neither sex extending much farther 



caudad than the maxilla; surface of antennae roughened with three or 



four interrupted rows of minute tubercles 5. cerisyi 



Smerinthus jamaicensis Dru. 

 Color chestnut brown or darker, occasionally marked with black; 

 surface polished and glossy; head, thorax and appendages with shallow 

 impressed lines, mostly transverse, the abdomen with rather coarse 

 punctures more distinct on segments 1-3 and 8-10, an irregular row or 

 two of larger punctures along the cephalic margins of segments 1-7, 

 these so close together on the movable segments as to give it a honey- 

 combed appearance; segments 4-7 with the puncture's connected and 

 obscured by irregular impressed lines; segments 5-7 with a slightly 

 elevated smooth, polished area on the dorsum just caudad of the larger 

 punctures along the cephalic margin; maxillae short, extending a trifle 

 over one-third the distance to the caudal margin of the wings ; antennae 

 of male longer and broader than those of the female, in the male extend- 

 ing almost as far caudad as the mesothoracic legs, in the female not as 

 far as the prothoracic pair; surface of antennae either smooth or with 

 one row of minute tubercles on the median line; scar of caudal horn 

 slightly elevated, with a slight concavity just caudad of it; cremastei 

 very rugose with short projections along the lateral margins, ending in 

 a blunt point, and frequently curved slightl}^ dorsad. Length of pupa 

 30-35 mm., greatest width 9 mm. 



Smerinthus cerisyi Kirby. 



The only constant difference found between this species and the 



preceding one is that the antennae do not show sexual variation and in 



neither sex do they extend as far caudad as the prothoracic legs. The 



surface is roughened with about three rows of minute tubercles in 



