1918] Piipce of Common Sphingidce 421 



Sphinx drupiferarum A. & S. 



Color dark purplish brown, the purple tinge more apparent in fresh 

 pupa^; head, thorax and appendages roughened with deep, wavy- 

 impressed lines and indistinct tubercles, the latter most evident in the 

 region of the clypeus and labrum; abdomen punctate, with the punc- 

 tures larger on the cephalic third of segments 1-6 which is slightly 

 elevated, and on the remaining segments, the punctures extending on 

 the ventral surface; 'maxillary loop 9 or 10, rarely 11 mm. long, extend- 

 ing about two-fifths the distance to the caudal margin of the wings; 

 surface of antenna; almost covered near the proximal end with indistinct 

 tubercles which are scarcely visible on the distal half, the lateral mar- 

 gins very slightly elevated and often bearing a distinct row of minute 

 tubercles ; antenna; of male usually extend as far caudad as the pro- 

 thoracic legs, those of the female shorter; mesothorax with an elevated 

 median ridge, and an inconspicuous transverse ridge on either side of it 

 near the cephalic margin of the segment, which never extends half-way 

 across; scar of caudal horn smooth, with a concavity just caudad; 

 cremaster 3-3.5 mm. long, longer than broad and slightly bifurcate at 

 tip. Length of pupa 47-53 mm., greatest width 11 mm. 



Alcoholic specimens of S. drupiferarum are rather hard to 

 separate easily from 5. chersis, because both become very dark 

 brown or nearly black if the latter are placed in alcohol when 

 nearly mature. The easiest way, if one has seen both species, 

 is to examine the metathoracic ridges. The length and sculptur- 

 ing of the antennas usually will furnish a reliable means of 

 separation, although the length does vary somewhat. 



Sphinx kalmiae A. & S. 



Color bright reddish brown, sometimes marked with black; body 

 appearing polished, the sculpturing shallow; head and thoracic segments 

 slightly roughened with impressed lines; abdominal segments punctate 

 with wavy inipressed lines between, the punctures larger on the cephalic 

 part of segments 1-8 and interrupted by short longitudinal depressions; 

 maxillary loop 7.5-8 mm. long, extending one-third of the distance to 

 the caudal margin of the wings, slightly raised from the surface and 

 touching only at the bulbous tip ; antennae with a distinct row of small 

 tubercles extending along the median line for about two-thirds of the 

 length, the lateral rows very indistinct or wanting; antennee in both 

 sexes nearly of equal length extending to, or very slightly beyond, the 

 prothoracic legs; scar of caudal horn not very distinct, identified by a 

 smooth polished area; cremaster 2-2.5 mm. long, very rugose, shallowly 

 bifurcate at tip. Length of pupa 35-45 mm., greatest width 9 mm. 



