4§ DIPTERA. 
1. Abdomen grey with black reflecting spots, the anal segment 
rufous... . . variegata, v. d. Wulp. 
Abdomen shining black, or + rufous with a broad black dorsal 
band . .. . oe . woe ee we 
2. Thorax and scutellum black, the thoracic dorsum only anteriorly 
grey with black stripes . . . . . . . 1 es + « + = Obscurella, y. d. Wulp. 
Thorax and scutellum yellowish-cinereous . . . . . 3. 
3. Anal segment laterally with whitish reflections (male) ; front 
tarsi not dilated in the female . . . . ..... ~~. . forreri, v.d. Wulp. 
Anal segment without whitish reflections ; front tarsi dilated in 
; the female. 2. 2 1 1 ew ee ee ee ee 
4, Abdomen laterally rufous . . . . . . 1 1 we ee | Smithi, v. d. Wulp. 
Abdomen unicolorous black. . . . . 2... . . «+ « «intermedia, v. d. Wulp. 
1. Nemorea variegata, sp. n., ¢ 2. 
Thorax cinereous, with four black stripes ; abdomen with blackish and cinereous reflecting spots; anal segment 
rufous; antenne and legs black; wings greyish-hyaline. 
Length 7—10°5 millim. 
Head yellowish ; cheeks and sides of the front with brown reflections; front of the male narrow, that of the 
female a little broader than the eyes; frontal band black; frontal bristles on both sides descending in a 
single row to beneath the end of the second antennal joint; beard and pilosity of the occiput whitish ; 
cheeks narrow ; the eyes descending nearly to the inferior part of the head. Antenne black; second joint 
with many short bristles; third joint twice as long as the second, rounded at the tip; arista thickened on 
the proximal half. Proboscis black; palpi thick, black or dark brown in the male, rufous in the female. 
Thorax cinereous, the thoracic dorsum grey with four black stripes, which are also conspicuous behind 
the transverse suture; scutellum piceous. Abdomen ovate; first segment black; second and third 
segments testaceous in the male, black in the female, with whitish or cinereous, irregular, reflecting spots ; 
anal segment in both sexes rufous, with clear (greyish or ochraceous) reflections; second and third 
segments only with marginal macrochete; anal segment with several irregularly-placed macrochete. 
Legs black, bristly ; middle tibie outwardly with a longer bristle ; hind tibie on the outside almost fringe- 
like with many bristles ; foot-claws black, the pulvilli yellowish, elongate in the male; front tarsi of the 
female not dilated. Tegule whitish. Wings nearly hyaline; small cross-vein on the middle of the discal 
cell ; apical cross-vein nearly straight ; posterior cross-vein more or less curved. 
Hab. Mexico, Xucumanatlan 7000 feet and Omilteme 8000 feet, both in Guerrero 
(H. H. Smith). 
Two males and one female. 
Owing to the shape of the head and the eyes, this species belongs to the division of 
Nemorea upon which Rondani has formed his genus Chetolyga. 
2. Nemorza obscurella, sp.n., 3 9. 
Black ; head and anterior part of the thorax cinereous, the latter with five black stripes; palpi rufous ; abdo- 
minal segments only with marginal macrochete. 
Length 9°5-10°5 millim. 
Front cinereous, narrowed behind, in the female broader than the eyes; frontal band blackish, in the male 
nearly as broad as the sides, in the female proportionally narrower ; frontal bristles descending to the end 
of the second antennal joint, in the male in a single row, in the female outwardly with some other bristles. 
Face and cheeks whitish, with cinereous reflections, the cheeks descending somewhat beneath the eyes 
