MASICERA. 111 
face a little retracted; above the vibrisse some shorter bristles, two or three of which are inserted 
much higher up on the facial ridges. Eyes not quite reaching the inferior part of the head. Antenne 
distinctly shorter than the face ; third joint three or four times as long as the second; arista thickened 
to the proximal half and with a short pile on the upper part. Proboscis and palpi rufous, the palpi 
cylindrical and with a whitish reflection. Thorax whitish-grey, with four black stripes, which are very 
distinct before the transverse suture, but less defined behind it; scutellum grey. Abdomen conical ; 
first segment black ; second and third segments grey, with irregular black reflecting spots; anal segment 
rufous, with a greyish front border; on the hind margins of the second and third segments are strong 
macrochete ; on the anal segment the macrochete form a double row; ventral surface (except the anal 
segment) blackish, with white reflections. Front and hind tibie with short, the middle tibie with some 
longer bristles. Tegula whitish. Wings brownish-grey, slightly infuscated along the costa, and with a 
short costal spine ; small cross-vein a little before the middle of the discal cell; curvation of the fourth 
vein nearly rectangular and with a vestige of a short appendage; apical cross-vein concave ; posterior 
cross-vein slightly curved. 
Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith). 
A single female specimen. 
This species differs from the others of the genus in the pubescent arista, the costal 
spine, and the appendage at the curvation of the fourth vein. In having bristles on 
the facial ridges, it shows some affinity with Prospherysa, these bristles, however, 
being few in number and not forming a row, the species seems to be better placed in 
Masicera. 
15. Masicera trichoneura, sp. n., 2. 
Cinereous ; antennew, hind borders of the abdominal segments, and legs black; palpi rufous ; first and third 
veins of the wings bristly. 
Length 8 millim. 
Head white, a little broader than the thorax; front twice as broad as the eyes; frontal band as broad as the 
white lateral portions, blackish, but sometimes inconspicuous in a whitish reflection ; just above the antennz 
a white point, surrounded by a blackish ring ; frontal bristles stout, but few in number, and inserted on 
black points, two or three of them beneath the root of the antennw; above the vibrisse some short 
bristles; beard white. Antenne a little shorter than the face ; second joint with a bristle; third joint 
three times as long as the second, truncate at the tip; arista long, thickened to the proximal half. 
Proboscis black, with the terminal lips pale rufous; palpi pale rufous, slender. Thorax and scutellum 
cinereous; thoracic dorsum with four black lines—the intermediate lines only conspicuous before the 
transverse suture, the outer ones interrupted and somewhat obsolete. Abdomen conical ; first segment 
black ; the following segments grey, with their posterior half shining black; macrochzte robust, at the 
hind margins of the second and following segments; anus truncate and surrounded by many bristles, 
All the tibie with rather long bristles. Tegule whitish. Wings nearly hyaline; first vein with short 
bristles over its whole length ; third vein bristly to beyond the small cross-vein, the latter resting on the 
middle of the discal cell; apical cross-vein concave; posterior cross-vein straight. 
Hab. Mexico, Xucumanatlan 7000 feet in Guerrero (H. H. Simith). 
A single female specimen. 
In the bristly veins and other characters this species has some affinity with the genus 
Plagia; but, owing to the less oblique position of the exterior cross-veins, it is better 
placed 4 in the genus Masicera. 
' 
ae 
