72 
DIPTERA. 
segment) ; macrochete are only at the hind margin of the third segment and on the anal segment. Legs 
black; middle tibiee with some long bristles; hind tibie outwardly fringe-like with bristles and with a 
longer bristle below the middle; foot-claws and pulvilli slightly elongate, the pulvilli yellowish. Tegule 
whitish. Wings nearly hyaline; small cross-vein a little before the middle of the discal cell ; apical and 
posterior cross-veins oblique, the apical nearly straight, the posterior distinctly curved. 
Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith). 
A single male specimen. 
92. Exorista humilis, sp.n., ¢. 
Shining black ; head whitish ; thorax with whitish tomentum and black stripes; abdomen ovate, with grey 
front borders to the segments, 
Length 6 millim. 
Front as broad as the eyes, scarcely narrowed behind ; frontal band black, narrower than the lateral portions, 
which are blackish with a white reflection; frontal bristles on both sides descending in a curved row to 
just beneath the end of the second antennal joint; face and cheeks white, with grey reflections ; pilosity 
of the eyes only conspicuous when viewed under a lens ; vibrisse surmounted by several shorter bristles. 
Antenne black, nearly as long as the face; second joint short, bristly ; third joint five times as long as 
the second; arista thickened in its proximal half. Proboscis and palpi black, the palpi thicker towards 
the tip. Thoracic dorsum with a whitish tomentum and four black stripes; a fifth, median, stripe is less 
conspicuous ; scutellum black. Abdomen ovate, pointed towards the anus, shining black, with a somewhat 
bronze tint, grey or cinereous reflections, and whitish front borders to the segments ; long macrochete 
are on the hind margins of the second and third segments, and several on the anal segment. Legs black; 
middle tibiae with some long bristles ; hind tibie outwardly with bristles of unequal length ; foot-claws 
and pulvilli elongate, the pulvilli whitish. YTegulw grey, with a yellowish margin. Wings greyish- 
hyaline ; small cross-vein distinctly before the middle of the discal cell; apical and posterior cross-veins 
nearly straight. 
Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 
A single male specimen. 
93. Exorista maura, sp. n., 2. 
Black ; head whitish ; thorax greyish, with black stripes ; palpi rufous; small cross-vein before the middle of 
the discal cell. 
Length 10 millim. 
Head white, with dark grey reflections; front broader than the eyes; frontal band blackish-brown, narrow ; 
frontal bristles descending to the number of four beneath the root of the antenna ; pilosity of the eyes 
short, yellowish ; beard white. Antenne black, shorter than the face; second joint bristly; third joint 
four times as long as the second; arista thickened in its proximal half. Proboscis black ; palpi exserted, 
pale rufous, infuscated at the base. Thorax with grey tomentum, especially anteriorly and on the pleure ; _ 
thoracic dorsum with four black stripes; sometimes a fifth stripe appears between the two median stripes ; 
scutellum black. Abdomen ovate, convex, shining black, with a slight bluish tint; the second and third 
segments have very narrow whitish front borders, the second also with greyish reflections, which in the 
middle are interrupted by a black dorsal stripe ; macrocheet# are on the hind margins of all the segments, 
and there are several on the anal segment. Legs black; middle tibie with some long bristles; hind 
tibie outwardly fringe-like with short bristles. Tegule whitish. Wings greyish-hyaline; small cross- 
vein perpendicular and before the middle of the discal cell; apical cross-vein nearly straight ; posteriox 
cross-vein slightly curved. 
Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith). 
Two female specimens. 
