NATURAL SCIENCES OF PHILADELPHIA. 545 



short, rather hairy beneath ; middle joint smooth, rather thickened in the 

 middle and about four times as long as the apical joint ; terminal joint very 

 sliort, ovate. Tongue as long as the thorax beneath. 



Body not metallic, rather stout, equal in length to the fore wings, smooth. 

 Patagia moderate, decumbent, and overlapping the meso-thorax. Abdomen 

 tapering at the tip, more than one half as long as the body beneath. Legs 

 smooth, rather stout ; tarsi roughened with spines ; fore tibice with a stout 

 internal spur from the base ; hind tibiae with four spurs. 



0. sphingiformis. 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 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 contracted behind. Hind wings, exterior half yellow, interior 

 half black. The under surface of the wings the same as above. Abdomen 

 beneath with a central yellow stripe. Legs black ; fore coxa? each with a yel- 

 low spot ; femora white internally ; tibia? striped with white. Length of body 

 9 lines ; of the wings 19 lines. 



Mexico, near Jalapa. 



The structure of this insect shows marked affinities to the group of Sphinges. 



Cyanopepla. 



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 discal 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 prominent. Antennae more 

 than one half as long as the body, minutely pectinated or serrated beneath. 

 Palpi curved, ascending rather above the middle of the face, smooth, slightly 

 hairy at the base ; mid He joint rather more than twice longer than the basal 

 joint ; terminal joint very minute, ovate. Tongue equal to the thorax 

 beneath. 



Body metallic, cylindric, scarcely slender, smooth. Patagia rather small, 

 somewhat erected. Abdomen less than one half as long as the body beneath. 

 Legs rather slender, smooth ; fore tibiae with a short, concealed middle spur ; 

 hind tibiae with four rather short spurs. Tarsi minutely spinous. 



C. cruenta. Black. Palpi blue. Head and body metallic blue. Fore 

 wings with a large crimson spot at the base, extended to the middle of the 

 disk and to the fold beneath, and another of the same hue, oval and obliquely 

 placed in the median nervules ; inner margin at the base and a streak alon- 

 the submedian vein metallic blue ; cilia at the tip white. Hind wings dark 

 bluish black, immaculate. Length of the body 7 lines ; of the wings 20 lines. 



Mexico, near Jalapa. 



Euchromia, Hiibner. 

 Group, Horamia, Walker. 

 Wings narrow. Fore wings much longer than the body. The subcostal 

 I860.] 



