310 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.51. 



in; cubitus at right angle, farther from margin; hind cross vein at 

 about 45° to inner margin, halfway between small cross vein and 

 cubitus. Tegulae not so enlarged. 



ZOSTEROPSIS RUTHERFORDI, new species. 



Length of body, 6 mm.; of wing, 4.75 mm. Two males, Pera- 

 deniya, Ceylon, June 16, 1913, and July 7, 1914 (A. Rutherford). 



Black, rather shining. Face, cheeks, and orbits silvery; para- 

 frontals, thorax, and scutellum thinly silvery; four thoracic vittae 

 moderately narrow and nearly equal, the pollen inclosed by the two 

 of each side with a dull golden tinge. Last three abdominal seg- 

 ments rather broadly but thinly silvery on base. Wings deeply 

 smoky except area behind fifth vein, that outside hind and apical 

 cross veins, and the distal half of apical cell. Tegulae dilute smoky, 

 the outer portion of front scale whitish. 



Holotype.—'No. 20036, U.S.N.M. (July 7). 



Named in honor of Mi*. A. Rutherford. 



MUSCINOTHELAIRA, new genus. 



Genotype. — Muscinothelaira lutzi, new species. 



Differs from Euthelaira as follows: Female. Form Muscina-like. 

 Eyes only thinly hairy. Head more flattened, the front not promi- 

 nent in profile. Front and face a little wider in proportion to eye- 

 surface, cheeks a little wider. Palpi bowed, well thickened apically. 

 Second antennal joint rather short; third joint about four times 

 second. Arista sparsely pubescent. Only two sternopleurals. Three 

 lateral scutellars; only a pair of divergent hairs on apex of scuteUum. 

 Abdomen short-oval, about same length and width as thorax. Ab- 

 dominal macrochaetae not so strong. Legs shorter, tarsi delicate, 

 the front tarsi not dilated; claws short. Wings broad, extending 

 far behind tip of abdomen, slightly bulged on costal border. 



MUSCINOTHELAIRA LUTZI, new species. 



Length of body, 7 mm.; of wing, 7.5 mm. One female, Sao Paulo, 

 Brazil (Dr. A. Lutz). 



Parafrontals, face, and cheeks silvery-white pollinose, with a watery 

 uster. Frontaha brown. First two antennal joints dark rufous ; palpi 

 rufous. Third antennal j oint and vertex black. Thorax and scutellum 

 black, thinly silvery; four vittae nearly equal, the outer ones broadly 

 interrupted. Abdomen brown to dark brown or blackish; very 

 thinly silvery, showing most on sides, faintly on incisures, but appar- 

 ent in oblique hghts elsewhere. Legs dark brown; tibiae bro\vn. 

 Wings nearly clear, a deeply infuscate area extending from small 

 cross vein and tip of auxiliary vein to tip of second vein. Tegulae 

 smoky-translucent, the outer edge of front scale opaque. 



Holotype.— No. 20037, U.S.N.M. 



Named in honor of Dr. Adolpho Lutz. 



