MASICERA. 109 
Two. male and four female specimens. | | 
This species is distinguished from all its congeners by.the black base and costa of 
the wings, the black markings being still more intense in the female. 
10. Masicera bistrigata, sp. n., °. 
Yellowish-cinereous ; frontal band, two broad stripes on the thorax, hind margins of the abdominal segments, 
antenne, and legs black; palpi and terminal lips of the proboscis rufous. — 
Length 6°5 millim. oe 
Front yellowish, as broad as the eyes, not narrowed behind ; frontal band as broad as the yellowish lateral 
portions ; frontal bristles descending on each side in a single row to the second antennal joint ; face 
silvery-white, slightly retracted ; oral margin not prominent ; vibrisse surmounted by some short bristles; 
eyes large, occupying the whole lateral part of the head. Antenne as long as the face; second joint 
with a longer and some very short bristles ; third joint six times as long as the second; arista thickened 
to the proximal half. Proboscis black, with the terminal lips pale rufous; palpi obscure at the base, 
distinctly thickened and pale rufous towards the tip. Thoracic dorsum yellowish-cinereous, almost ochra- 
ceous, with two broad black stripes, which almost reach the hind margin; scutellum yellowish-cinereous, 
with blackish reflections; pleure grey, with black reflections. Abdomen ovate, convex, yellowish-grey ; 
first segment, the hind margins of the following segments (to one third of their length), and an indistinct 
dorsal stripe, black; sometimes the whole surface is blackish, except a narrow front border to the 
segments ; the first and second segments have only lateral macrochete, the third has a row of about eight 
marginal macrocheete, and there are some others round the anus; ventral surface dark greyish. Front 
tibia with some short bristles; middle tibiee outwardly with a long bristle; hind tibie outwardly with 
several bristles of unequal length. Tegule whitish. Wings greyish-hyaline ; third vein with short 
bristles from the base to the small cross-vein, which is inserted a little before the middle of the discal 
cell; curvation of the fourth vein with a blunt angle ; apical cross-vein nearly straight; posterior cross- 
vein very slightly curved. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith). 
A single female specimen. 
11. Masicera normula, sp.n., ¢ 2. 
Cinereous; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenne, and legs black; palpi 
rufous; scutellum testaceous, at least towards the hind margin ; frontal bristles on each side in a 
single row. 
Length 7-9 millim. 
Front cinereous, as broad as the eyes, in the female a little broader; frontal band as broad as the lateral 
portions ; frontal bristles descending on each side in a single row beneath the root of the antennz; face 
whitish ; vibrissee surmounted by several shorter bristles. Antennz nearly as long as the face; second 
joint with short bristles ; third joint three or four times as long as the second ; arista thickened to 
the proximal half. Proboscis black ; palpi dark rufous, in some specimens black with a rufous tip. 
Thorax whitish-cinereous, with four black stripes, these being most conspicuous before the transverse 
suture; scutellum cinereous, with the hind margin testaceous, sometimes wholly of the latter. colour. 
Abdomen ovate, cinereous, with blackish reflecting spots and an indistinct black dorsal stripe ; the first 
segment wholly black, shorter than the second; the front margins of the second and following segments 
whitish ; a pair of macrochete on the hind margin of the first and second segments, a row of macro- 
checte on the hind margin of the third segment, and several macrochetze on the anal segment; ventral 
surface blackish. Front tibiee outwardly with short bristles ; middle tibia with some long bristles; 
hind tibie outwardly with a row of bristles of unequal length ; foot-claws and pulvilli elongate in the 
male, the pulvilli yellowish. Tegule whitish. Wings greyish-hyaline ; a dilute brown streak between 
the first and second veins; small cross-vein before the middle of the discal cell; curvation of the fourth 
vein rectanglar ; apical cross-vein a little concave ; posterior cross-vein slightly curved. 
