232 DIPTERA. 
bristles ; foot-claws and pulvilli elongate in the male, the pulvilli yellowish-grey. Tegule yellowish. 
Wings brownish-grey ; small cross-vein on the middle of the discal cell; curvature of the fourth vein 
somewhat rounded; apical cross-vein concave ; posterior cross-vein curved. 
Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 
Five specimens (four males, one female). 
11. Rhynchodexia strigilata, sp.n., 2. 
Grey ; thoracic dorsum with five black stripes ; scutellum greyish-rufous ; abdomen with blackish reflections ; 
basal joints of the antenne, palpi, and legs, including the coxe, rufous ; tarsi black. 
Length 12 millim. 
Head sericeous-white, with dark grey, and on the lower portions brownish-rufous, reflections ; front as broad 
as the eyes; frontal band dark brown; vibrissal swellings slightly convergent. Antenne with the first 
two joints and the base of the third rufous, the latter for the rest brownish-black ; second joint with some 
bristles ; third joint twice as long as the second ; arista densely but not long-plumose. Proboscis black ; 
palpi rufous, slender. Thorax grey, before the transverse suture with five black stripes—the three median 
linear and close together, convergent towards the head, the two lateral stripes broader and prolonged 
behind the suture; scutellum rufous, but covered with a whitish-grey tomentum. Abdomen elongate- 
oval, pointed towards the apex, grey, with irregular and ill-defined blackish-brown reflections ; second and 
third segments with a pair of discal macrochete, which, however, are shorter than those on the hind 
margins ; anal segment with several macrochete. Legs, including the coxe, rufous, the coxe and the 
underside of the femora with whitish reflections; tarsi black; tibia with scattered bristles. Tegule 
whitish, with a yellow margin. Wings grey, the base yellowish ; small cross-vein on the middle of the 
discal cell; apical and posterior cross-veins curved. 
Hab. Mexico, Ciudad in Durango 8100 feet (Forrer). 
A single female specimen. 
12. Rhynchodexia macroptera, sp. n., 2. 
Cinereous; thoracic dorsum with black stripes ; scutellum greyish-rufous ; abdomen with blackish reflecting 
spots; base of the antenne, palpi, and legs (including the cox) rufous ; tarsi black. 
Length 8-9 millim. 
Head light grey; oral margin and lower portion of the cheeks with rufous reflections; front broader than the 
eyes ; frontal band blackish or brown; vibrissal swellings parallel. Antenne with the first two joints 
and the base of the third rufous, the latter for the rest blackish; second joint prominent, with some 
bristly hairs; third joint twice as long as the second ; arista black, thickened at the base, finely plumose. 
Proboscis shining black, scarcely longer than the head ; palpi rufous, slender, slightly thickened towards 
the tip. Thorax cinereous, with five black dorsal stripes, the three median linear and close together ; 
scutellum rufous, but covered by a grey tomentum. Abdomen ovate, cinereous, with dark brown or 
blackish reflecting spots; second segment with two marginal macrochete ; third and anal segments with 
a row of submarginal and a pair of discal macrochete, the discal ones of the third segment sometimes 
absent (or broken off ?) ; ventral surface grey. Legs rufous, with black tarsi; all the tibie with scattered 
and rather long bristles. Tegule whitish. Wings brownish-grey, proportionately large; small cross-vein 
on the middle of the discal cell; curvature of the fourth vein somewhat rounded ; apical and posterior 
cross-veins distinctly curved. 
Hab. Mexico, Venta de Zopilote 2800 feet, Amula 6000 feet, Omilteme 8000 feet, 
Sierra de las Aguas Escondidas 9500 feet, all in Guerrero, Mexico city (H. H. Smith). 
A large series of specimens, all females. 
