186 DIPTERA. 
arista thickened in its proximal half. Proboscis black; palpi yellowish, filiform. Thorax and scutellum 
whitish-grey ; thoracic dorsum with four black stripes, the outer stripes interrupted at the transverse 
suture; base of the scutellum black. Abdomen conical, shining black; second and following segments 
with narrow white front borders; all the segments with long marginal macrochete. Posterior tibix 
with rather long bristles. Tegule white. Wings greyish, without a costal spine ; small cross-vein before 
the middle of the discal cell; the terminal portions of the third vein and of the apical cross-vein curved 
towards each other ; posterior cross-vein almost straight, nearer to the curvature of the fourth vein than 
to the small cross-vein. 
Hab. Mexico, Xucumanatlan 7000 feet, Omilteme 8000 feet, both in Guerrero 
(H. H. Smith). 
Two female specimens. 
ANISIA, gen. nov.* 
Front not prominent; frontal bristles descending on each side in a single row more or less beneath the root of 
the antenne ; face perpendicular; facial ridges without bristles; vibrisse inserted just at the oral 
margin; cheeks narrow. Eyes bare (in A. pullata, A. obscurifrons, and A. ophthalmica microscopically 
pubescent). Antenne shorter than the face; basal joints short ; third joint much longer than the second ; 
arista not visibly jointed. Proboscis exserted ; palpi filiform or slightly thicker towards the tip. Abdomen 
conical or ovate; second and third segments with discal and marginal, or only with marginal, macro- 
chete. Legs moderately long and bristly ; front tarsi not longer than the tibia. Wings longer than the 
abdomen, usually without a costal spine ; apical cell opened at or close to the wing’s tip ; curvature of the 
fourth vein angular, rarely somewhat rounded. 
The large number of species I include in this genus have the apical cell opened at 
or near the wing’s tip, but they cannot be included in any of the preceding genera 
possessing this character. Amnisia is closely related to Telothyria, and differs from that 
genus only by the vibrisse being inserted just at the oral margin. From Lasiona and 
Macquartia it is distinguished by the bare eyes ; from Myobia, Polygaster, Labidigaster, 
and Hypostena by the less elongate shape of the abdomen and legs; from Degeeria and 
Didyma by the absence of bristles on the facial ridges. 
In the genus Anisia I include the following species :— 
1. Second and third abdominal segments with discal and marginal 
macrochete .. . . . . se ew DQ 
Second and third abdominal segments with marginal macro- 
chete only . .... re. 
2. Legs, or at least the femora, rufous Lee . . 8. 
Legs black (in one species the base of the hind femora rufous). 7. 
3. Antenne black. . 2 2 1. 1 1 1. 1 ww ww... inflewa, v. d. Wulp. 
Antenne rufous. . . . . 4. ; 
4, Frontal bristles scarcely descending beneath the root of the 
antenne ... . . . rubripes, v. d. Wulp. 
Frontal bristles descending to the end of the second antennal 
joint . oe ee De 
5. Abdomen cinereous. . . . . .. 1... . + cineraria, v. d. Wulp. 
* dyvoos (unequal). 
