MASICERA. 105 
16. First and third veins with short bristles . . . . . + . érichoneura, v. d. Wulp. 
First and third veins without bristles . . . . - - . . I%. 
17, Yellowish-cinereous, with narrow black hind borders to the 
abdominal segments . . . . + - + + + + + « « flavescens, v. d. Wulp. 
Whitish-grey, with broad black hind borders to the abdominal 
segments. . . . + « « » bilineata, v. d. Wulp. 
18. Body broadly ovate; second and third abdominal segments 
with a black dorsal stripe and two lateral spots . . . . curta, v.d. Wulp. 
Body elongate-oval; abdomen with blackish hind borders to 
the segments . 2. 2. 2 ee ee ee et eee YD 
19. Bristles above the vibrisse reaching higher than the end of | 
the antenne ; apical cross-vein straight . . . . . . dgecta, v. d. Wulp. 
Only some bristles immediately above the vibrisse . . . . 20. | 
20. Hind tibiz outwardly with a row of short bristles . . . . sordida, v. d. Wulp. 
Hind tibize outwardly with some long and stout bristles . . calcarata, v. d. Wulp. 
1. Masicera luctuosa, sp. n., ¢ 2. 
Cinereous ; frontal band, four thoracic stripes, broad hind borders to the abdominal segments, antenne, palpi, 
and legs black ; discal and marginal macrochete on the abdomen. 
Length 5:°5-7°5 millim. . 
Front of the male narrower than the eyes, in the female somewhat broader ; frontal bristles descending on 
each side in a single row to beneath the second antennal joint; vibrisse surmounted by some bristles ; 
cheeks narrow; beard whitish. Antenne a little shorter than the face; second joint bristly ; third joint 
three times as long as the second; arista thickened to the proximal half. Proboscis black, the terminal 
lips with long yellow hairs; palpi thickened towards the tip. Thorax and scutellum cinereous ; thoracic 
dorsum with four black stripes, which are prolonged behind the transverse suture, but do not fully reach 
the hind margin of the thorax. Abdomen conical; first segment black ; the following segments cinereous, 
with the posterior half black, the black colour more or less extended as reflections; sometimes a black 
dorsal stripe appears; discal and marginal macrochete are present on the second and following segments. 
Middle tibiee 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 grey with a yellowish margin. Tegule greyish. 
Wings hyaline, in some specimens slightly brownish along the costa; small cross-vein on the middle of 
the discal cell; curvation of the fourth vein with a blunt angle; apical cross-vein straight; posterior 
cross-vein curved. 
Hab. Mexico, Xucumanatlan in Guerrero 7000 feet, Atoyac in Vera Cruz, Teapa in 
Tabasco (H. H. Smith). 
« Several specimens. 
2. Masicera strigata, sp. n., ¢ 2. 
Cinereous ; front ochraceous ; face white; frontal band, four thoracic stripes, hind borders of the abdominal 
segments, antenne, proboscis, and legs black; palpi rufous ; discal and marginal macrochate on the 
abdomen. 
Length 6°5 millim. 
Front a little prominent, as broad as the eyes ; frontal band as broad as the lateral portions; frontal bristles 
few in number, three of them descending beneath the root of the antenne ; face, posterior orbits of the 
eyes, and beard white. Antenne nearly as long as the face; second joint with short bristles ; third 
- joint three times as long as the second ; arista thickened to ‘less than half its length. Thorax and scutellum 
BIOL. CENTR.-AMER., Dipt., Vol. II., Ifarch 1890. p 
