196 DIPTERA. 
four times as long as the second ; arista thickened in its proximal third. Proboscis black, its terminal 
lips rufous; palpi rufous, thickened towards the tip. Thoracic dorsum yellowish-cinereous, with four 
black stripes—the median ones linear, the outer ones interrupted at the transverse suture ; pleure grey ; 
scutellum blackish, with the posterior half grey. Abdomen subconical ; first segment black ; the following 
segments grey, with broad shining black hind borders, and with discal and marginal macrochete. 
Middle tibie with some long bristles; hind tibie outwardly with several bristles of unequal length. 
Tegule whitish. Wings greyish-hyaline ; small cross-vein nearly on the middle of the discal cell; apical 
and posterior cross-veins straight. 
Hab. Mexico, Tierra Colorada 2000 feet, Venta de Zopilote 2800 feet, and Amula 
6000 feet, all in Guerrero (H. H. Smith). 
Three female specimens. 
20. Anisia accedens, sp. n., °. 
Shining black ; thorax anteriorly grey, with four black stripes; abdomen with narrow white front borders to 
the segments; palpi rufous. 
Length 5 millim. 
Head whitish ; front as broad as the eyes, slightly narrowed behind; frontal band black, as broad as the 
lateral portions ; frontal bristles descending as far as the end of the second antennal joint. Antenne 
black, shorter than the face ; second joint bristly ; third joint three times as long as the second; arista 
thickened to the proximal half. Proboscis black, its terminal lips and the palpi rufous. Thorax and 
scutellum black; thoracic dorsum before the transverse suture with greyish tomentum and four black 
stripes ; laterally the grey tomentum is extended to a band which reaches from the shoulder to the root 
of the wing and to another band on the pleure towards the middle coxw. Abdomen subconical, convex, 
shining black; second and following segments with narrow white front borders, and with discal and 
marginal macrochaxte. Legs black; middle tibie with some long bristles; hind tibie outwardly with 
several bristles of unequal length. Tegule whitish. Wings greyish-hyaline; small cross-vein on the 
middle of the discal cell; apical cross-vein oblique, straight; posterior cross-vein slightly curved. 
Hab. Mzxico, Amula in Guerrero 6000 feet (H. H. Smith). 
Two female specimens. 
21, Anisia peregrina, sp. n., ¢. 
Thorax whitish, with four black stripes; abdomen shining black, with white front borders to the segments ; 
frontal band, antenne, proboscis, palpi, and legs rufous; third vein bristly. 
Length 7 millim, 
Head silvery-white ; front as broad as the eyes ; frontal band rufous, broader than the white lateral portions ; 
frontal bristles descending a little beneath the root of the antenne ; vibrisse inserted near the oral 
margin, surmounted by several other bristles. Antenne rufous, as long as the face; basal joints very 
short, the second with some short bristles; third joint six times as long as the second; base of the arista 
rufous and slightly thickened. Thorax and scutellum greyish-white ; thoracic dorsum with four black 
stripes, the outer ones broader than the others; behind the transverse suture the stripes become 
diffuse in a more general black coloration, which, however, does not reach the hind margin of the thorax.. 
Abdomen elliptical, convex, shining black; second and following segments with white front borders ; 
sometimes a black dorsal stripe appears ; anal segment much shorter than the preceding segment ; all the 
segments with long marginal macrochexte. Legs, including the coxe, yellowish-rufous, the tarsi brown ; 
posterior tibie with some rather long bristles; foot-claws and pulvilli short. Tegule yellowish. Wings 
with a yellowish-grey tint; small cross-vein on the middle of the discal cell ; third vein slightly arcuate 
near its end, and with a row of short bristles extending from the base to the small cross-vein 3 curvature 
of the fourth vein rounded ; apical cross-vein somewhat concave ; posterior cross-vein scarcely curved. 
Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (Hf. H. Smith). 
A single female specimen. 
