280 LEPIDOPTERA OP NORTH AMERICA. 



1. O. sphingiformis Clemens. 



Bluish-black. Face with a blue band. Body with a yellow 

 stripe on each side extending from the head to the tip of the abdo- 

 men. Palpi blackish, whitish at the base and on the second joint 

 beneath. Fore wings with the extreme costa from the base to 

 beyond the middle yellow, with a broad stripe of the same hue 

 from the base to the hind margin beneath the tip, somewhat con- 

 tracted behind. Hind wings, exterior half yellow, interior half 

 black. The uuder surface of the wings the same as above. Abdo- 

 men beneath with a central yellow stripe. Legs black; fore coxae 

 each with a yellow spot ; femora white internally ; tibias striped 

 with white. Length of the body 9 lines; of the wings 19 lines. 



The structure of this insect shows marked affinities to the group 

 of Sphinges. 



Mexico, near Jalapa. 



Clemens. 



CYANOPEPLA Clemens. 



Female? Fore wings much longer than the body, moderately 

 broad, rounded at the tip, and very oblique along the margin. 

 The subcostal vein adjacent to the external margin, with a single 

 marginal nervule from near the hind end of the disk, and a second 

 marginal nervule just exterior to it. The apical branch near its 

 exterior third sends off a post-apical nervule, and near the tip a 

 nervulet to the costa. The subcosto-inferior nervule and the dis- 

 cal vein arise at a common point, the latter angulated. Median 

 vein 4-branched, with the posterior nervule rather remote from the 

 others, and the origin of the first subcosto-marginal nervule. Hind 

 wings rather more than one-half as long as the fore wings, nearly 

 equal to the length of the body. Without costal vein. Subcostal 

 bifid at the origin of the discal vein, which is much curved. Me- 

 dian vein 4-branched, the superior branch is medio-discal, the two 

 middle ones from a common base, the posterior remote. 



Head moderate, smooth, without distinct neck ; without ocelli. 

 Face rather narrow, smooth. Eyes rather small, moderately pro- 

 minent. Antennae more than one-half as long as the body, minutely 



