EXORISTA. 69 
15. Exorista flavirostris, sp.n.,¢ @. (Tab. III. fig. 7; 7a, head in profile.) 
Thoracic dorsum bluish-grey ; scutellum testaceous ; abdomen light cinereous, with brown reflections and black 
hind borders to the segments; antenne and legs black; palpi and terminal lips of the proboscis 
yellowish-rufous. 
Length 9 millim. 
Head yellowish-white ; front (at least in the male) less broad than the diameter of the eyes; frontal band 
black; frontal bristles descending on both sides to the number of three beneath the root of the antenne ; 
vibrissze surmounted by some shorter bristles. Eyes with a rather dense and long pile. Antenne a 
little shorter than the face ; second joint with short bristles; third joint five or six times as long as the 
second ; arista thickened to one-third of its length. Proboscis black at the base, its large terminal lips 
yellowish-rufous ; palpi yellowish-rufous, rather thick. Thoracic dorsum with a bluish-grey tomentum 
and four obsolete dark lines; pleure: cinereous ; scutellum testaceous, partly covered with bluish tomentum 
like that on the thorax. Abdomen ovate, whitish-cinereous, with brown reflections ; first segment black ; 
the following segments with black hind borders and a black dorsal stripe; anus shining black; macro- 
cheetee rather long, only at the hind margins of the segments ; in the male on each side of the anus is a 
tuft of black hairs ; ventral face dark rufous, with whitish tomentum. Front tibie outwardly with a row 
of short bristles; middle tibie with some longer bristles; the hind tibiee with the bristles on the outer edge 
almost fringe-like, and with a longer bristle in the middle ; foot-claws and pulvilli elongate in the male, 
short in the female, the pulvilli yellowish. Tegule whitish. Wings greyish-hyaline ; small cross-vein 4 
little before the middle of the discal cell; apical cross-vein slightly curved; posterior cross-vein nearly 
straight, inserted on two-thirds of the apical cell. 
Hab. Mexico, Orizaba (coll. Bellardi), Teapa in Tabasco (H. H. Smith). 
A male and three female specimens. 
16. Exorista interstincta, sp. n., 2. 
Ovate, cinereous ; thorax with three black stripes, on each side of the median stripe a black line ; scutellum 
testaceous ; abdomen not longer than the thorax, variegated with black and cinereous; antenne and legs 
black ; palpi rufous. 
Length 5 millim. 
Head greyish ; front a little broader than the eyes, with parallel sides; frontal band black ; frontal bristles 
weak, descending to the end of the second antennal joint. Antenne shorter than the face, the second 
joint showing a tendency to become rufous; third joint three times as long as the second ; arista thickened 
on the proximal half. Proboscis black; palpi pale rufous. Thorax cinereous, with three broad black 
stripes over its whole length ; anteriorly on either side of the median band a black line ; scutellum testa- 
ceous, blackish at the base. Abdomen broadly ovate ; first segment black, the following segments cine- 
reous with black reflections, which on the second and third segments usually appear in the form of two 
trigonal spots at the hind borders and an interrupted dorsal band; on the anal segment the dorsal band 
alone is conspicuous; on the hind margin of the second segment are two macrochete, on that of the 
third segment a row of longer macrochzxte ; the anal segment is short and beset with bristly hairs. Legs 
black; hind tibie slightly enlarged, outwardly fringed with short bristles, and with a longer bristle 
below the middle. Tegule whitish. Wings greyish-hyaline ; small cross-vein a little before the middle 
of the discal cell; apical cross-vein nearly straight ; posterior cross-vein slightly curved. 
Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith). 
A single female specimen. 
