CHARLES W. HOOKER. 153 



lutely proven. However, several of the smaller specimens 

 of macrurus with hyaline wings answer Say's description in 

 all respects. E. druryi Kriechbaumer is, in all probability, 

 also a synonym of macrurus as comparison of the description 

 with specimens shows ; the wings and dark reddish color of 

 the body point unmistakably to macrurus, and the fact that 

 the specimens were taken well within the range of macrurus 

 (New York) confirms this belief. The very name given by 

 Christ, "The American Yellowbeak," suggests macrurus. 

 If any such species, differing from macrurus, existed in the 

 State of New York, it would certainly appear in some of the 

 American collections. The fact that the specimens of E. 

 druryi were bred from Platysavtia prometheas, Samia cynthia 

 and Te lea Polyphemus adds to the certainty. 



I was greatly surprised to find that Ophion mexicanus 

 Cresson, which has been placed in the Genus Enicospilus, is 

 apparently a synonym of macru7'2is. The hyaline membra- 

 naceous spots which Cresson mentions in the discocubital 

 cell are only colorless thickenings which appear frequently 

 in E. macrurus and can not be called maculae. After careful 

 examination of this type I can not consider mexicaniis even a 

 subspecies of macriu^us. The specimens which Cameron 

 figures and partially describes as mexicanus are evidently 

 some other species belonging in the Genus Enicospilus. 

 Cresson described mexicanus as follows : 



" Female. Large, luteous yellow, shining, clothed with a very short, 

 pale pubescence ; head pale, mandibles and palpi tinged with fulvous, 

 tips of mandibles dusky; eyes large, pale; ocelli very prominent, whit- 

 ish ; antennae as long as the body, dusky fuscous thorax ; opaque ; meso- 

 thorax flattened, with three subobsolete longitudinal fulvous stripes; 

 scutellum yellow ; metathorax obliquely flattened posteriorly with 

 coarse arcuate and oblique striae and a transverse sinuate carina near 

 the base; tegulse pale; wings hyaline, nervures fulvous, inner radial 

 nerve incrassate towards the stigma and recurved, membranaceous 

 spots in first submarginal cell hyaline, consisting of a cuneiform spot 

 and beneath it a narrow curved line, broadly dilated towards the apex 

 of the wing ; legs slender, femora darker in color than the remainder ; 

 abdomen tinged with brown, first segment slender, slightly and gradu- 

 ally dilated at the apex. 



" Length, 1 inch." 



TRANS, AM. ENT. SOC. , XXXVIIl. (20) 



