20 DIPTERA. 
blackish-grey, in the male narrowed behind; median band piceous ; frontal bristles rather stout, on both 
sides descending in a single row to a little below the root of the antennw; beard pale yellow ; pilosity of 
the occiput grey; above behind the eyes is a row of short black bristles. Antennz black, the two basal 
joints sometimes more piceous in tint; second joint bristly ; third joint in the male twice, in the female 
once and a half, as long as the second, broader at the end; arista rather distinctly jointed, thickened 
to a little beyond the middle, the distal part showing under a strong lens a microscopical pubescence. 
Proboscis shining black. Thorax with long and robust macrochetz ; scutellum with two rows of erect 
spines, and at the hind margin with long macrochete lying over the first abdominal segments. Abdomen 
with numerous spines, not only at the hind margin but also in the middle of the segments; on the last 
segment the spines are placed more irregularly, and round the anus they degenerate into the usual 
macrochets. Legs bright ochraceous, the femora testaceous ; cox and femora on the lower part with 
long bristles; front tibie outwardly over their entire length fringed with black bristles; the bristles on 
the outside of the intermediate and posterior tibiew, and especially those of the former, long and stout; 
foot-claws yellow, with black tips, in the male elongated and surrounded by long yellow hairs; in the 
female the front tarsi are a little dilated. Tegule brown, with their margin still more obscure in colour. 
Wings dark brown, especially along the costa ; small cross-vein placed before the middle of the discal cell ; 
both exterior cross-veins curved. 
Hab. Costa Rica, Rio Sucio, Cache, Volcan de Irazu 6000 to 7000 feet (fogers). 
Several specimens. This species bears a most striking resemblance to Dejeania 
pallipes, Macq.; but it is usually smaller in size, and may easily be distinguished by 
the absence of the long exserted palpi, by the third joint of the antennz being not 
longer than the second (in D. pallipes it is conspicuously longer), the stouter macro- 
cheetee on the upper part of the thorax, and by having bristles on the front tibize out- 
wardly over their entire length. 
9. Saundersia laticornis, sp.n.,¢. (Tab. I. figg. 15; 15a, head in profile ; 
15 6, antenna.) 
Thorax greyish-yellow ; scutellum rufous, the abdomen black, both densely spinose ; head yellowish ; antenne 
and legs rufous, the third joint of the former broad, subtriangular; tegule and base of the wings fulvous. 
Length 10 millim. . 
Head pale ochraceous; front blackish-grey, narrowed behind, with a narrow brownish-red median band; 
frontal bristles descending to a little beneath the root of the antenne; cheeks with a hardly perceptible 
pile ; vibrissee surmounted by three or four smaller bristles; beard pale yellow; pilosity of the occiput 
more greyish in tint; behind the orbit of the eyes is a row of rather long black hairs. Antenne fulvous; 
the entire upper part of the second joint beset with short bristles; third joint once and a half as long 
as the second, enlarged towards the end and truncate, thus almost triangular; arista rather distinctly 
jointed, gradually tapering and pubescent towards the end. Proboscis sbining black, slender, nearly as 
long as the thorax. Thorax covered with a greyish-yellow (in certain lights almost ochraceous) tomentum, 
with four distinct longitudinal black stripes, a black pilosity, and long macrochete. Abdomen convex, 
black, its entire surface beset with spines. Legs fulvous, with black pile; tarsi slender, the terminal 
joint surrounded by black hairs ; claws with black tips. Tegule fulvous. Wings grey, with a slight 
reddish tinge, fulvous at the base and at the beginning of the costa; small cross-vein placed just before 
the middle of the discal cell; curvature of the fourth vein with an acute angle; apical cross-vein curved 
at its base; posterior cross-vein but little curved. 
Hab. Costa Rica, Rio Sucio (Rogers). 
A single male specimen. 
