654 [December 



a right angle with its body, and closely folds against it, its three pairs of 

 legs. After maturity it does not assume this position, even if provoked 

 by the finger, but crawls about with restless activity. Buried in the 

 ground August 10th and 25th, where it constructs a ground cell at the 

 ordinary depth. 



Of four larvas taken, I have not been able to obtain the imago, each 

 having died while in pupation, one after having retained its vitality 

 until the second summer. It has probably not been hitherto described. 

 From the long tongue-case of the pupa it would seem to belong to 

 Walker's group of Macrosila^ but of the species therein embraced none 

 of the larval descriptions are applicable to it; that of ciiu/ulata by Ab- 

 bot and Smith approaches it in the '■ diamond shaped blackish brown 

 patches anteriorly, but diflPers in most of the other particulars. 



Pupa. 1.60 in. long, .40 in. broad; chesnut brown. Head-case 

 sub-triangular, extending by more than the length of the first segment 

 beyond it, and somewhat beyond the base of the tongue-case. Tips of 

 the antennae-cases in the % * reaching very nearly to the tips of the 

 middle leg-cases. The exserted tongue-case dark brown, .40 in. long 

 in its exterior curve, nearly sti'aight, slightly raised from the breast by 

 its terminal bulb, marked with transverse confluent wrinkles and a 

 medial ridge ; the buried portion of the tongue-case extends beyond 

 the tips of the wing-cases. First segment inclined at an angle of about 

 45°, with wrinkles radiating from its medial line; first stigma dark 



*The following description of that portion of the pupa case which covers the 

 anal and generative organs, is drawn from a number of C. quadricor-ni.s j)upee : 

 with some slight modifications, resulting from a greater or less degree of deve- 

 lopment, it is believed that it will serve to indicate the sexes of all the Sphinges: 



In the % , the eleventh segment infei-iorly is similar to the preceding one, and 

 its posterior incisure is uninterrupted and rectilinear. On the twelfth segment, 

 occupying its length, which is quite short, are two prominent elongated granu- 

 lations, divided by a deeply impressed line. Posterior to this is the anal plate, 

 having a central sulcus, with prominent margins, within a sub-oval, smooth, 

 depressed spot, and is similar in both sexes. 



In the 9 > the eleventh segment interiorly is marked with an impressed me- 

 dial line, on each side of which, near the middle of the segment, is a small elon- 

 gated granulation : posterior to which, and extending on the twelfth segment, 

 is a sub-oval smooth spot, through which the impressed medial line is conti- 

 nued; the intermediate incisure is interrupted by tlie smooth spot, and (in som*» 

 species) is bent in an angle directed anteriorly. 



