NORTH AMERICAN LEPIDOPTERA. 147 



clasper at its inferior nuirgin. The supra-anal plate is small, tri- 

 gonate, the hook short, broad, flattened above and somewhat re- 

 flexed at the side margins, not much curved ; the inferior process 

 flattened, trigonate, but little shorter than the superior. 



The characterization of the genus, except as to the genitalia, is 

 largely taken from Prof. Fernald's paper on Sphingidaj of New 

 England, and the shorter note in Ent. Am. ii, 2, — it having been 

 found correct in all essentials. I united Ampelopharja and Darapsa 

 under the later term in my synopsis of genera. The term Darapsa 

 had been previously restricted to a West Indian form not congeneric 

 with our species, and Prof. Fernald uses Boisduval's term Everyx for 

 our species. Bremer and Grey's generic term, however, has prioi-ity 

 of both Boisduval's and Walker's, and Butler says that versicolor is 

 perfectly congeneric with the typical species, while he leaves myroii 

 and choerilvs in the Hiibnerian genus Otus. Hiibner's term, how- 

 ever, is pre-occupied. Fernald pointed out the spimdation in the 

 tibiae of chcerilus, and Mr. Grote thereupon separates that species 

 from versicolor and myron, which he calls Ampelophaga, under the 

 term Everyx. 



The spinulation of the tibiae is so slight and so unimportant a 

 feature in view of the general agreement in all stages that the sepa- 

 ration seems hardly justifiable. 



The species are all Eastern, and mostly double brooded. They 

 are all occasionally attracted to sugar and light. 



The species may be divided as follows : 



Anterior and middle tibije spinose chceriliis. 



Tibiae not spinose. 



Under side of primaries reddisli and gray without yellow markings.. myron. 

 Under side of primaries green, with yellow markings versicolor. 



.4. chcerilus Cram., Ex. iii, 91, pi. 247, fig. A, Sphinx ; Hiih., Verz. 142, Otus ; St. 

 Farg. & Serv., Enc. Meth. x, 441, Smerinthus ; Harr.,* Sill. Journ. .36, 302, 

 Chcerocampa ; Wlk., C. B. M. Lep. Het. viii, 182, Darapsa; Clem.,* Journ. 

 Ac. N. Sci. Phil, iv, 1859, 147, Darapsa; Morr.,* Syn. 1862, 168, Darapsa ; 

 Grt., Pr. E. S. Ph. v, 81, Otus ; Grt., BuflT. Bull, i, 22, Darapsa ; Beth., Can. Ent. 

 i, 10, Otus; Hulst,» Bkln. Bull, ii, 35; Bd.,* Sp. Gen. Lep. Het. i, 210, 

 Everyx; Grt., Buff. Bull, iii, 222, Everyx; Butl., Tr. Zool. Soc. Lond. ix, 54.5, 

 Otus; Edw.,* Pap. iii, 126, Everyx; Fernald,* Sphing. 64, Everyx; Grt., 

 Hawk Moths 30, Everyx. 



clorinda Martyn, Psyche, pi. 2.5, figs. 66-67, 1797, i^phiux ; Butl., Tr. Zool. 



Soc. Lond. ix, 545, pr. syn. 

 azalese Sm. & Ablj.,-- Ins. (ia. i, 53, pi. 27, Sphinx ; Harr., Sill. .Journ. 36, 302, 



pr. syn. 



