CHRYSOTUS. I'LL. _ 



The lateral margin of the abdomen shows a distinct gray-whitish 

 dust. The small hypopygium is completely imbedded ; it has (as 

 I now perceive on a well-preserved specimen) four strong bristles 

 on the hind margin, like the hypopygium of the males of Diapho- 

 rus; the appendages of the hypopygium are extremely small, and 

 completely hidden. Coxas black, somewhat shifting to green, ren- 

 dered gray by a covering of dust ; the fore coxae at the tip are of 

 a dusky-yellowish color, and beset with black bristles, while on 

 their front side there is some pale hair. -Femora green, not 

 strong and fringed with comparatively short black hair. On the 

 four anterior femora the tip to a considerable extent, and on the 

 hind femora only the extreme tip are of a brownish-yellow color. 

 Tibiae brownish-yellow, the tip of the hind tibiae strongly infus- 

 cated, all the tibiae with but few bristles. Tarsi black-brown, the 

 first joint of the middle tarsi up to its first third, that of the fore 

 tarsi up to the middle, yellow-brownish. Fore tarsi but little 

 longer than the fore tibiae, and their first joint not quite so long 

 as the rest ; their pulvilli not enlarged. Tegulae white-yellowish 

 with brownish-black cilia. Wings grayish hyaline with a greasy 

 lustre ; veins brown ; the first longitudinal vein lies close to the 

 margin of the wing and reaches only a little over the first quarter 

 of the length of the wings ; the costa is rather stout, particularly 

 near the end of the second longitudinal vein ; the posterior trans- 

 verse vein is straight and is pretty much in the middle between 

 the root and the tip of the wing. 

 Hob, Mexico. 



Gen. XXX. CHRYSOTUS. 



The genus Chrysotus contains on the average only small spe- 

 cies. The eyes of the males in many species meet upon the front ; 

 in males of other species they are separated. The front becomes 

 broader towards the vertex in most of these species, and more so 

 than is the case with the species of Diaphorus. Antenna? very 

 short ; the first joint without any hair ; the second transverse ; the 

 third rounded, often rather kidney-shaped, sometimes pointed and 

 distinctly hairy ; only in one species, which, on account of the 

 agreement of all the other characters, I have located with Chry- 

 sotus, the third joint of the antennae is considerably longer, almost 

 of the same shape as in most of the species of Aryyra. The two- 



