1920] Alexander: Tanyderid Flies 405 



Bruchomyia argentina, sp. n. 



General appearance much like a Molophilus; antennae elongate, 

 •setaceous, 30-segmented ; body and wings covered with long con- 

 spicuous hairs; m lacking; a patch of dark hairs at r-m. 



Male. — Length, 4-4.5 mm.; wing, 4.3-5 mm.; antenna about 4 mm. 



Frontal prolongation of the head short, brown, margined with dull 

 yellow; palpi dark brown, conspicuous, covered with abundant long 

 dark hairs. Antennae setaceous, scapal segments dull yellow; flagellvim 

 pale brown, clothed with abundant subappressed dark hairs. Head 

 grayish brown; lateral portions of the vertex with sparse black bristles, 

 the median area with a high, dense crest of whitish hairs. 



Pronotum brown, the lateral portions of the scutellum pale yellow. 

 Mesonotum brown, the praescutum and scutum with three rather 

 narrow gray stripes, the interspaces and a broad median strip provided 

 with abundant black hairs; remainder of the mesonotum brown with 

 abundant pale hairs. Pleura pale brownish yellow, the episternum 

 more brownish, provided with long whitish hairs. Halteres stout, 

 dark brown. Legs with the coxae very long and slender, provided with 

 hairs; trochanters comparatively small; remainder of the legs brown, 

 covered with an abundant pale appressed pubescence and scattered 

 erect bristles. Wings pale yellow, a little suffused with darker beneath 

 the end of vein Sc; veins pale brown; veins and margin fringed with an 

 abundant, long, dark-colored pubescence, longest at the region of the 

 anal angle ; a conspicuous patch of blackish brown hairs at r-m and the 

 deflection of R^. Venation, (Fig. 2). 



Abdomen brownish testaceous, the tergites margined caudally with 

 darker; surface of the abdomen covered with long whitish hairs. 



Habitat'. Argentina. 



Holotype, c^, La Granja, Alta Gracia, Province de Cordoba, 

 April 1-8, 1920 (Charles Bruch). 



Paratopotypes, 3 cf's. 



Type in the collection of the writer; paratype and other 

 specimens in the collection of the La Plata Museum. 



