314 DIPTERA. 
HYETODESIA. 
Yetodesia, Rondani, Dipt. Ital. Prodr. vi. p. 110 (1877). 
This genus is identical with Aricia, Schiner (Faun. Austr., Dipt. i. p. 599), 
after the abstraction of A. lardaria, Fabr., which has been separated by Rondani 
under the generic name Polietes. It includes Anthomyine with nearly or quite 
contiguous eyes in the male sex, a broadly ovate abdomen, a plumose arista, and 
pilose eyes. | 
Five species from Central America are known to me:— 
1. Wings with a distinct blackish cloud on the two cross-veins . . . . 2. 
Wings without blackish cloud, a slight shadow at the small cross-vein 
excepted 2 6. 6 6 ee ee ee ee ee ee eee 
2. Palpired . 2. 1. 1 ee wee ee eee ee wwe we rebel, Vv. A. Walp. 
Palpi black . 2. 2. 1. 2 ew ew ee ee we ee ee ee 
3. Legs almost wholly black. . . . . . . ee ee ee ee .) «6muleata, Gigl.-Tos. 
Legs yed . . ww ee ee ee ee ee eee ee ee procedens, Walk. 
4, Arista and eyes short-haired. . . . . 1. 2 ee ee ee ee) dongiseta, v. d. Wulp. 
Arista and eyes long-haired . . . . . . 1. «w+ «abacta, Gigl.-Tos. 
1. Hyetodesia rubella, sp.n., 9. (Tab. VIII. figg. 1; la, head in profile.) 
Cinereous ; thorax with four black stripes; scutellum rufous; base of the abdomen yellowish; anal segment 
rufous; cross-veins clouded with black. 
Length 7 millim. 
Front as broad as the eyes, with parallel sides; frontal band black, bifid towards the vertex; face whitish, 
perpendicular ; vibrissee inserted at the oral margin, which is not prominent; lower part of the cheeks 
under the eyes narrow and with many bristles; eyes short-haired. Antenne inserted a little above the 
median line of the eyes; basal joints rufous; second joint exserted into a point and having a small 
bristle ; third joint reaching to near the vibrisse, brownish, except its basal part, which is rufous ; arista 
as long as the antenna, thicker at the base and with long hairs. Proboscis black; palpi pale rufous, 
rather long, cylindrical, slightly eularged towards the tip. Thorax cinereous, with four distinct black 
stripes; scutellum rufous, blackish at the base, with many discal and marginal macrochete. Abdomen 
ovate ; the first two segments yellow and slightly transparent, with a black hind border, which is narrow 
on the first segment, and on the second much broader and prolonged in the middle, limiting the yellow 
ground-colour to a pair of large lateral spots; third segment black, with cinereous reflections; anal 
segment rufous; macrochete present at the hind margin of the third segment and on the whole surface 
of the anal segment. Legs black or piceous; the tips of the femora and the front tibie dark rufous ; 
front femora with a row of bristles on the upper and under sides; all the tibia with spurs, the 
middle and hind tibiee with some bristles ; foot-claws and pulvilli short. Tegule whitish. Wings grey, 
slightly brownish along the costa; small cross-vein under the end of the first vein and a little beyond the 
middle of the discal cell; posterior cross-vein slightly undulate; both cross-veins bordered with dark 
brown. 
Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 
A single female specimen. 
