Oct.. igi2 Bulletin of the Brooklyn Entomological Society 18 



or domestica. Whether the specimen listed from Mexico (Teapa 

 in Tabasco) by Professor Williston (Biol. Cent. Amer. Diptera 1, 

 Suppl. 226, Dec. 1900) refers to this variety or not is uncertain. 

 Rhipidia annulicornis Enderlein. 



I have four specimens that agree closely with Enderlein 's 

 description except in their smaller size. The female has never been 

 described, and I make this the allotype. 



Allotype, female, quite like the male in color; valves of the 

 ovipositor are rather short, tergal valves very slender, arcuated; 

 sternal valves bladelike, almost straight. 



Male: Length, 4.1 mm.; wing, 5.2-5.4 mm. Female: 4.3- 

 -4.4 mm.; wing, 5.4-5.5 mm. 



Allotype, female, Trinidad, June (Aug. Busck) ; three speci- 

 mens, 2cf 1 ? with the allotype. Allotype and Id' 1 ? in Coll. 

 U. S. Nat. Mus.; \& in author's collection. Some of the speci- 

 mens are very pale as though newly transformed. 

 Rhipidia schwarzi sp. n. 



Antennae subpectinate ; mesothoracic prsescutum with a 

 broad pale margin ; wings with numerous dots in the cells ; anten- 

 nae mostly black. 



Male: Length about 5.5 mm.; wing, 5.4-6.3 mm. (type). 

 femora, 4.3 mm.; tibia, 5.2 mm. 



Male: Head: rostrum and palpi dark brownish-black. 

 Antennae, first segment elongate-cylindrical; flagellar segments 

 strongly subpectinated, less marked on the apical segments. 

 Antennae dark brown, segments 12-13 white. Front, vertex and 

 occiput dark brown, thickly gray-pollinose, clearer gray behind. 



Thorax : Pronotum above almost white, especially the scutel- 

 lum. Mesonotum, praescutum, lateral and cephalic margin 

 broadly pale yellow, very conspicuous, narrowest just before the 

 wing root, broadest in front; remainder of the sclerite rich chest- 

 nut-brown, darkest brown just inside the pale lateral band; scutum, 

 lobes dull chestnut, pale, grayish, medially and on sides. Pleurae 

 brown, dorsal edge light yellow, continued back from the pra^scutal 

 margin, becoming almost white behind the wing root, a dark brown 

 stripe extending from the cervical sclerites caudad, running above 

 the fore coxa, beneath the root of the halteres, fu.sing with the dark 

 abdominal pleural stripe ; ventral portions of pleurae and the ster- 

 num pale, grayish-pollinose. Halteres light yellow, knob a little 



