2 WILLISTON: DIPTERA BRASILIANA. 
Paramyia nigra, n. sp. 
Female. Black. Front opaque, with a long, shining triangle, 
reaching nearly to the front border. Pace more yellowish; in some 
reflections silvery on the sides. Proximal portion of the proboscis 
piceous; distal portion yellowish. | Thorax shining; mesonotum 
with rather abundant, short, black hair. Abdomen less shining than 
the mesonotum. The knees narrowly, the front and middle tibia 
and tip of the hind tibie, and all the tarsi yellow. Wings tinged 
with brownish. Length 2% mm. 
One specimen, Grenada, H. H. Smith. 
Beckeriella, gen. nov. 
Front very broad and short; a single, small, fronto-orbital bristle 
present on each side. No bristle on the second joint of the anten- 
nw; arista pectinate. Face about one-third the width of the head; 
flattened and receding onthe upper half, the lower half or third pro- 
jecting; with one or two small bristles on each side; clypeus promi- 
nent. Mesonotum without bristles save one on each side in front 
of the scutellum; hair very short, the acrostichal ones in two rows. 
Scutellum much swollen, with along projecting spine on each angle, 
into which is inserted a bristle. Abdomen broad and arched; rough- 
ened; first segment very short, the fifth and sixth (female) together 
about equal to two-thirds the length of the fourth. Claws curved; 
pulvilli present. Third and fourth longitudinal veins of the wings 
convex anteriorly, the fifth ventricose posteriorly; the costal vein 
reaches to the fourth vein. Eyes bare. Oral opening small. 
This genus has not a little resemblance to the following, and al- 
so to Lytogaster, from both of which it will be easily distinguished 
by the structure of the head, as well as by other characters. The 
male probably has only three visible abdominal segments. 
It gives me pleasure to dedicate this genus to Mr. Theo. Becker, 
who is doing work of much value to American students in dipterol- 
ogy. 
Beckeriella bispinosa. 
Ephydra bispinosa Vhomson, Eugenies Resa, 593. Rio de Janeiro. 
i} 
Female. Front brown pollinose, opaque. Face moderately 
shining black. Antennae reddish yellow. Cheeks very narrow. 
Mesonotum shining, somewhat metallic black, with indistinct stripes 
of fine white pubescence. Halteres black. Pleure shining black; 
finely whitish or yellowish pubescent. Abdomen moderately shin- 
ing, somewhat metallic black, with delicate white pubescence, leav- 
ine the narrow hind margin of the third and fourth segments shin- 
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