268 Annals Entomological Society of America [Vol. IV, 



ulations. Otherwise the characters common to undulosa and 

 catalpce are shared by Sphinx. 



In D. undulosa, the type, the head is \ higher than wide, 

 very strongly tapering toward the vertex, the horn is only a 

 little slenderer than normal, and the labrum is moderately 

 notched, with seta iii in the normal place. In D. catalpce 

 (Fig. 11), the head is broad and rounded, shaped as in Deil- 

 ephila; the labrum is quite deeply notched, with iii nearly on a 

 level with ii, as in the Semanophorae ; the body is unusually 

 cylindrical and the horn is very slender. I have seen a spec- 

 imen from the U. S. National Museum, with no data but the 

 name Daremma hageni. It is a typical Smerinthus in structure, 

 and could be the fourth stage of one of the larger species 

 (cerisyi), but is rather sparsely granulated. I should suspect 

 it was misidentified. 



Chlcenogramma. Head like that of Daremma undulosa, but 

 with inconspicuous enlarged granules on the vertices. Body 

 like Atreides plebius. Horn normal in length. 



Cocytius (antceus). Head not at all tuberculate, but decid- 

 edly higher than wide, and terminating in two enlarged gran- 

 ules, like a fourth-stage Smerinthus, but higher and closer 

 together at the vertex. Front full as high as wide, the lobes at 

 the outer lower angles are not only well marked in outline, but 

 project very conspicuously; front less than § height of epi- 

 crania, iii and ii of the labrum are on a level, but the notch runs 

 even higher, and is very narrow. The distance between the 

 two setae ii is less than § the width of the labrum, and i, ii 

 and vi are all located practically in the notch. Cervical shield 

 as smooth as head, the anal is very rough, like the horn, and is 

 a narrow triangle. Skin not at all granulated. Altogether an 

 unusually distinct genus for this series. The structure so far 

 as it is not unique suggests Sphinx rather than any other 

 genus, but I understand the moth comes nearer to Phlege- 

 thoutius. 



Phlegethontius (Protoparce) Notch of labrum only one- 

 seventh its height, not reaching the level of seta vi; iii and iv 

 not so high as usual. Caterpillar distinctive in appearance, 

 but not otherwise separated in structure from normal Sphinx. 

 S. rusticus is said to be sparsely granulated on the lines. I, 

 Fig. 51. 



