RHYNCHODEXIA. 229 
yellowish-white. Wings grey, with black venation; small cross-vein on the middle of the discal cell ; 
apical cross-vein slightly concave; posterior cross-vein curved. 
_ Hab. Mexico, Ciudad in Durango 8100 feet (Forrer), Xucumanatlan in Guerrero 
7000 feet (H. H. Smith). 
Two male specimens. 
5. Rhynchodexia simulans, sp. n., c. 
Blackish; basal joints of the antenne, palpi, scutellum, and sides of the abdomen rufous, the abdomen with 
whitish reflecting spots ; hind tibiee straight. 
Length 12°5 millim. 
Agrees with R. conjuncta, and only differs from it by its larger size, the rufous scutellum, a more conical 
abdomen, the straight hind tibia, and the curvature of the fourth vein more sharply angular. 
Hab. Mexico, Northern Sonora (Morrison). 
Two male specimens. 
6. Rhynchodexia fraterna, sp.n., ¢ 2. 
‘Thorax and scutellum cinereous, the thorax with black stripes ; abdomen rufous, with a black dorsal band (¢ ) 
or testaceous (@), in both sexes with whitish reflecting spots; antenne and palpi rufous, the third 
antennal joint brown ; legs black. 
Length 9-14°5 millim. 
Head yellowish-grey ; front convex, in the male much narrowed behind, in the female broader than the eyes ; 
frontal band blackish; cheeks bare, almost without rufous reflections ; occiput grey: vibrissal swellings 
parallel. Antenne short, rufous; second joint prominent, with long bristles ; third joint twice as long 
as the second, usually brown towards the tip; arista thickened at the base, long-plumose. Proboscis 
shining black, with rufous terminal lips; palpi rufous, cylindrical, slender, in the female slightly 
thickened towards the tip. Thorax cinereous, with three distinct black longitudinal stripes, and on each 
side of the median stripe a narrow black line; scutellum cinereous. Abdomen of the male conical, 
rufous, with a broad black dorsal band, whitish reflecting spots, and many discal and marginal macro- 
cheete ; in the female ovate, testaceous, though darker in the dorsal region, and likewise with whitish 
reflecting spots, the discal and marginal macrochete present, but less numerous than in the male. Legs 
black; front femora on the upper- and undersides with regularly arranged bristles; middle and hind 
femora on the underside only with bristles on the proximal half, and towards the tip with obliquely 
arranged long hairs; front tibie with short, the middle and hind tibie with some longer bristles ; foot- 
claws and pulvilli elongate in the male, the pulvilli yellowish-grey. Tegule yellowish. Wings grey, at 
the base and costa with a dilute brownish-yellow tint; small cross-vein on the middle of the discal 
cell; curvature of the fourth vein usually somewhat rounded; apical and posterior cross-veins slightly 
curved. 
Hab. Muxico, Tepic, Santiago de Iscuintla (Schumann), Orizaba (Ff. D. G. and H. 
H. Smith), Acapulco, Tierra Colorada, Rincon, Venta de Zopilote, Chilpancingo, and 
“Amula, all in Guerrero, 2000 to 6000 feet, Cuernavaca in Morelos, Atoyac in Vera 
Cruz, Teapa in Tabasco (H. H. Smith). 
Several specimens of both sexes. They vary much in size and in the extension of 
the white reflections on the abdomen; in some of them these reflections are so much 
enlarged that the abdomen seems to be covered by a whitish tomentum. ‘Three of the 
largest specimens (males) agree fully with a typical example of Rhamphinina major, 
