192 JOHN B. SMITH. 



and secondaries brownish gray, the basal regions shading into light gray and 

 assuming a whitish tint near anal angle of secondaries. The anterior transverse 

 line on primaries and the marginal and medial bauds on secondaries well pro- 

 nounced. Fringes as above. Expands 4 — 4.50 inches; 100—112 mm. 



Hab. — New Mexico, Texas, Southwestern States. 



The description above is Mr. Neumoegen's description of separatiis, 

 and with which about all the specimens from the United States I 

 have seen agree very Avell. Walker describes lugens, from Mexico, 

 as " Blackish gray, paler beneath. Head and thorax paler on each 

 side. Thorax with two black stripes. Abdomen with interru[)ted 

 white and blackish bands. Fore wings slightly tinged with brown, 

 with costal marks and with discal and exterior streaks ; two whitish 

 discal dots, the fore one occasionally obsolete. Hind wings black, 

 with two whitish undulating bands; ciliie white." 



In addition may be mentioned that in this species the transverse 

 lines are very distinct, recalling the maculation of Ceratomia. The 

 t. a. line is gemminate with a very strong outer band. The t. p. line 

 consists of three dark, with intermediate paler shade lines not very 

 distinctly marked, and very strongly dentated on the veins. 



Mr. Neumoegen adds to his description of separatus: " This stately 

 insect has been for many years confounded with Sphinx lugens Wlk., 

 which comes from Mexico, although a few specimens have been found 

 in our Southwestern States. Lugens Wlk., is a considerably smaller 

 insect, of a brownish olive tint, with delineations not so prominently 

 marked, and faint basal blotches. The excellent figure of Mr. 

 Strecker's Sphinx lugens Wlk. (H. Strecker's No. 13, fig. 12), would 

 do well for Sphinx separatus if the color were changed and the other 

 differences prominently marked." The original of Mr. Strecker's 

 figure came from Prof. Snow, who also sent Mr. Neumoegen speci- 

 mens. There is no doubt that the insects received by Mr. Strecker 

 and Mr. Neumoegen belong to the same species. The Museum col- 

 lection contains also a specimen from Prof. Snow which agrees very 

 well with ]\Ir. Neumoegen's description and Mr. Strecker's figure. 

 This same Kansas form described as separatus was previously de- 

 scribed by Strecker as ereraitoides. Specimens compared from Mexico 

 show only the differences in color between fresh specimens of the 

 Kansas form ; in older, more faded specimens the difference is not 

 noticeable. 



Mr. Strecker quotes Prof. Snow's description of the larva in the 

 " Observer of Nature" which I have not seen. The species is very 



