1918] Pupce of Common Sphingidce 429 



Genus Pseudosphinx Burm. 



The pupae of this genus are typically sphingiform. The head 

 is visible mostly on the dorsal surface. The labrum is only 

 visible in cephalic view, and the clypeo-labral suture is never 

 wanting. The maxilla extend from the cephalic end of the 

 body to the caudal margin of the wings and are slightly swollen 

 and excurved at the proximal end. Each mandibular region is 

 slightly elevated into a low tubercle, and these are visible at 

 the end of the body in ventral view. The antennae are slightly 

 elevated along the fiagellum. The metathorax has a prominent 

 ridge and the median Hne is also elevated. There are no 

 spiracular furrows present. The cremaster is triangular, ending 

 in a sHghtly bifurcate tip. 



Pseudosphinx tetrio L. 



Color black in alcoholic specimens, living ones marked with red, 

 occasionally with red predominating, but usually marked with red on 

 the transverse conjunctiva and on the head, thorax and appendages, 

 particularly on the ventral surface; body surface smooth and glossy, 

 with very faint impressed lines, but scarcely punctate except along the 

 cephalic margin of the movable segments ; abdominal segments showing 

 annulets and somewhat wrinkled dorsally; antennae smooth, slightly 

 longer in the male, those of the female extending just beyond the 

 prothoracic legs; exposed portion of prothoracic femur 3-4 mm. long, 

 the greatest width, .5 mm. ; cremaster finely rugose, 4 mm. in length, 

 slightly broader than long with a distinctly bifurcate ]3oint at tip. 

 Length of pupa 63-75 mm., greatest width 15 mm. 



Genus Erinnyis Hbn. 



In this genus the body is typically sphingiform and the 

 females are very much larger than the males. The labrum is 

 only visible at the cephalic end of the body. The maxillae 

 extend to the caudal margin of the wings. The antennae are 

 slightly longer in the male and extend beyond the prothoracic 

 legs, while those of the female seldom do. There are four or 

 five shallow spiracular furrows on the fifth segment, separated 

 by carinate ridges, but there are none present on the other 

 movable segments. The abdominal segments are thickly 

 punctate along the cephalic margin, and this area is slightly 

 elevated. The scar of the caudal horn is small and variously 

 indicated, usually by a slight elevation and radiating furrows. 

 The cremaster is triangular but not bifurcate at tip. 



