306 Catalogue of North American Sphinges. 



dorsal series of white dots on the abdomen ; in other respects it 

 seems nearly aUied to the ChamcBnerii. When my Catalogues of 

 the Insects of Massachusetts were published I was not aware that 

 the specific name Epilobii had been previously appropriated ; for 

 the species to which I then applied it I have now substituted 

 that of Chamcenerii derived from Tournefort's name for the genus 

 Epilohium. 



<§> LegitimcB ano harhato. L. 



Family II. MACROGLOSSIADiE. H. The Macroglossians. 



Sesiidce. Stephens. Sesiadm. Kirby. 



* Wi7igs angulated and indented; antennce tapering at the end, 

 with a long terminal hook. 



Genus VII. Pterogon. Boisduval. 



P 7 inscriptum. H. 



Ash-gray ; wings angularly indented ; first pair with two dusky 

 bands near the base, connected on the inner margin by a blackish 

 line, a few undulated and zigzag transverse lines beyond the mid- 

 dle, a dusky outer margin, a half-oval brown spot at tip, and a 

 small deep brown patch including a white I near the tip; hind- 

 wings reddish gray, with a dusky hind-margin ; collar edged 

 with brown ; abdomen wdth two dorsal series of black dots. Ex- 

 pands two inches. Inhabits Indiana. 



Of this species I have seen only two individuals, both females, 

 having rather long slender and simple antennae, attenuated and 

 curved so as to form a hook at the end. In the shape of the 

 wings and distribution of the colors this insect nearly resembles 

 some species of Smerinthiis, from which genus it is excluded by 

 the length of the tongue, which nearly equals that of the body. 

 Pterogon Gaurce, which I suppose to be the only legitimate spe- 

 cies of the genus that has yet been discovered in the United 

 States, is known to me only by Mr. Abbot's figure. 



Genus Till. Thyreus. Swainson. 



1. T. luguhris. L. 

 Brown ; wings sinuated and slightly angulated on the outer 

 edge ; first pair with an oblique streak and an eye-like dot before 



