426 Annals Entomological Society of America [Vol. XI, 



addition to the transverse striations found in both species. This species 

 is apparently a little larger, being from 32-37 mm. long and about 9 mm. 

 wide. I have never bred this species and have only a few pupa?, but 

 these characters were constant for the individuals examined. 



Smerinthus excaecata A. & S. 



This species is so variable that it is impossible to write a detailed 

 description that would fit better than the description of S. janiaicensis 

 which it strongly resembles. The sculpturing varies very much. The 

 color is usually a bright brown, but varies from chestnut to a very dark 

 brown. The antennse vary in the sexes, those of the male extending 

 about half way between the distal ends of the prothoracic and meso- 

 thoracic legs, while those of the female are considerably shorter and do 

 not nearly reach the tips of the prothoracic legs. The species may 

 always be distinguished by its large size, being both longer and stouter 

 than any of the closely related species. The length is from 35-43 mm., 

 greatest width 11 mm. 



Smerinthus my ops A. & S. 



This is normally easily distinguished from the other species included 

 in the genus Paonias, on account of its size but it is exceedingly difficult 

 to separate from S. jamaicensis and S. cerisyi. The only constant char- 

 acter found so far is the size of the spiracles, those of my ops being a 

 millimeter across, but in the other two species scarcely more than half 

 of this. The color of myops varies greatly, but is often a deep purplish 

 brown, which color has not been noticed in other species of the genus. 

 The antennas vary with the sex, as in S. jamaicensis, extending slightly 

 farther caudad than the maxillse in the female, and as far or farther 

 than the prothoracic legs in the male. The sculpturing of the antenna 

 varies greatly in this species. The length is from 30-36 mm., greatest 

 width, 9 mm. 



Smerinthus astylus Dru. 

 This species is more slender than myops, so far as observed, never 

 being over 8 mm. in greatest width. The sculpturing is usually not so 

 deep as on the other species and does not obscure the punctures on any 

 of the abdominal segments. The smooth area along the cephalic margin 

 of segments 5-7 is usually wrinkled or sparsely punctate, and never as 

 distinct as in other species. The punctures on the abdominal segments 

 are never as close together, and the body is more uniformly sculptured 

 throughout. Length of pupa 30-35 mm., greatest width 7.5-8 mm. 



Genus Pachy sphinx R. & J. 

 The pupae of this genus very strongly resemble some of the 

 Saturniidae. The body is broad in proportion to its length and 

 of practically the same width throughout, being narrowed but 

 very little at the cephalic end. The surface is rather coarsely 

 sculptured and shows distinct annulets on the dorsum of the 

 abdominal segments. The labrum is on the ventral surface. 



