106 DIPTERA. 
yellowish-cinereous ; thoracic dorsum with four black stripes, which are prolonged behind the transverse 
suture. Abdomen elongate; first segment black, nearly as long as the second; this and the following 
segments cinereous with the posterior half black, and with discal and marginal macrochewte, the marginal 
macrochztz of the third segment longer than the others; anal segment in the female pointed and with 
many bristles on the ventral side. Legs with scattered bristles; a rather long bristle on the middle 
of the posterior tibie ; foot-claws and pulvilli elongate in the male. Tegule and wings greyish ;- small 
cross-vein before the ‘middle of the discal cell; curvation of the fourth vein with a blunt angle; apical 
cross-vein nearly straight ; posterior cross-vein ‘slightly curved. 
Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet, Cuernavaca in Morelos, 
Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith). 
Two male and three female specimens. 
3. Masicera sodalis, sp.n., ¢ 2. 
Cinereous; frontal band, four thoracic stripes, hind borders of the abdominal segments, antenna, proboscis, 
and legs black; palpi rufous; discal and marginal macrochete on the abdomen. 
Length 5°5 millim. 
Closely allied to the preceding species, but differing in the coloration of the front, which is similar to that of 
the face (whitish with grey reflections). The front and the frontal band are narrower than in M. strigata ; 
and the wings are more obscure, especially along the costa. 
Hab. Mexico, Venta de Zopilote 2800 feet and Amula 6000 feet, both in Guerrero, 
Teapa in Tabasco (H. H. Smith). 
Two male and four female specimens. 
4, Masicera abdominalis, sp. n., ¢. 
Dark cinereous ; palpi and anal segment rufous; frontal band, four stripes on the thorax, antenns, and legs 
black ; no discal macrochets on the abdomen. 
Length 6 millim. 
Head yellowish-cinereous ; face perpendicular, not prominent (neither towards the front nor at the oral margin) ; 
facial ridges with some weak bristles reaching to nearly half the face; frontal band black, narrow, not 
fully prolonged to the vertex. Antenne a little shorter than the face, very slender; third joint nearly 
four times as long as the second ; arista thickened to the proximal half. Palpi dark rufous. Thoracic 
dorsum with four black stripes—the median stripes linear, the outer ones broader and prolonged behind 
the transverse suture. Abdomen ovate ; the first three segments cinereous, with slight blackish reflections ; 
sometimes a black dorsal band appears; anal segment yellowish-rufous; the second and third segments 
laterally with some reddish coloration ; macrochetze of these segments only at the hind margins, those of 
the anal segment less strong. Legs with scattered bristles. Tegule whitish-yellow. Wings greyish ; 
small cross-vein a little before the middle of the discal cell ; apical and posterior cross-veins nearly straight. 
Hab. Mexico, Temax in North Yucatan (Gauwmer). 
A single female specimen. 
5. Masicera tantilla, sp.n., ¢. 
Cinereous ; frontal band, four thoracic stripes, hind borders of the abdominal segments, antenne, palpi, and legs 
black ; small cross-vein on the middle of the discal cell. 
Length 5°5 millim. 
This species bears a striking resemblance to MU. strigata and M. sodalis, but may easily be distinguished from 
