DIPTERA. 451 
4. Ocyptera minor. 
Ocyptera minor, v. Réder, Berl. ent. Zeitschr. 1885, p. 344". 
Hab. Mexico, La Venta and Tierra Colorada in Guerrero (H. H. Smith) —ANTILLES, 
- Puerto Rico !. 
Two males and two females. 
BESKIA (to follow the genus Ocyptera, p. 5). 
Beskia, Brauer and v. Bergenstamm, Denkschr. Akad. Wiss. Wien, lvi. p. 139, t. 10. fig. 276 (1889). 
This genus, which includes but a single species, is shortly but clearly characterized 
by the authors. To their description may be added the following details :— 
Head broader than the thorax, in profile nearly quadrangular ; eyes bare, breadly separated by the front and 
descending to near the underside of the head; frontal bristles weak, two on the vertex longer and more 
robust; face perpendicular, the oral margin scarcely prominent, the vibrisse inserted exactly on it; 
antenn porrect; arista bare. Abdomen cylindrical; besides the four visible segments, there is still an 
indistinct basal and a very small anal segment; at the hind margins of the segments are rather long 
macrocheete ; two shorter macrocheti on the disc of the second and third segments. Wings as long as 
the abdomen ; curvature of the fourth vein rounded. 
1. Beskia cornuta. (Tab. XIII. figg. 12; 124, wing.) 
Beskia cornuta, Brauer & v. Berg. Denkschr. Akad. Wiss. Wien, lvi. p. 170°. 
Hab. Mexico, Tierra Colorada and Chilpancingo in Guerrero, Atoyac in Vera Cruz 
(H. H. Smith).—Braztu '. | 
Three specimens. In two of them the abdomen is wholly orange-yellow, thus 
agreeing with the description!, but in the third it becomes brown towards the apex; 
all have the foot-claws and pulvilli short, as in the Brazilian specimens described by 
the Austrian authors, which were considered by them to be males, though with some 
doubt. The front coxee have a white pubescence. The bristles of the tibiz are weak, 
those of the hind pair somewhat longer. In the wings the small cross-vein is under 
the end of the first vein and beyond the middle of the discal cell; the posterior cross- 
vein is straight, perpendicular, and nearly in the middle between the small cross-vein 
and the curvature of the fourth vein. 
XANTHOMELANA * (to follow the genus Beskia). 
Xanthomelana, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 188 (1892). 
Head broader than the thorax; eyes bare, in both sexes broadly separated by the front (in one species the 
front much narrowed behind in the ¢); front not prominent ; frontal bristles weak ; face perpendicular ; 
oral margin somewhat porrect, at some distance above it a pair of vibrisse; cheeks narrow. Antenne 
shorter than the face; third joint oval or elliptical; arista bare. Proboscis rather prominent; palpi 
filiform, very small. Thorax nearly quadrangular. Abdomen cylindrical, seldom elongate-oval, composed 
* EarOds (yellow); pédas (black). 
