ART. 10 TROPICAL AMERICAN DIPTERA VAN DUZEE 29 



17, cross vein thirteen-liftieths of a millimeter long; anal angle of 

 wing not at all prominent. 



Described from one male taken by J. M. Aldrich, May 1, 1926, at 

 El Salto, Antigua, Guatemala. 



Tijpe.—M^lQ, Cat. No. 41042, U.S.N.INI. 



Genus NOTHOSYMPYCNUS Wheeler 



Nothosi/mpi/cnus Wheeler, Proc. Califori^a Acad. Sci., vol. 2, 1899, p. 51. 

 NOTHOSYMPYCNUS UNIPILUS, new species 



Male. — Length 3 mm. Face narrow, silvery white, its sides par- 

 allel; front bright shining blue-green; first antennal joint black (other 

 joints broken off). 



Dorsum of thorax shining blue-green, a little dulled with brown 

 pollen; pleurae green with gray pollen. Abdomen and hypopygium 

 blaclrish bronze, basal segments more brown, venter j^ellow. Hypopy- 

 gium rather large, shining, its hairs pale, appendages very small, 

 yellow. 



Coxae, femora and fore and middle tibiae yellow ; tips of posterior 

 femora, and the posterior tibiae brownish; fore coxae with minute 

 yellow hairs, without black bristles at tip ; femora nearly bare below ; 

 bristles of posterior tibiae nearly as long as the diameter of the 

 tibia; fore tarsi (fig. 41) black from the tip of the third joint, which 

 has a long pale hair below near its middle; fore tibiae as 37; joints 

 of fore tarsi as 4r-31-ll-15-7; first two joints of posterior tarsi as 

 21-25. Halteres yellow. 



Wings slightly tinged with brown ; third and fourth veins parallel, 

 fourth ending in the apex of the wing; last section of fifth vein 37, 

 cross vein ten-fiftieths of a millimeter long; wing narrowed at base. 



Described from one male taken by J. M. Aldrich, May 1, 1926, at 

 El Salto, Antigua, Guatemala. 



Type.— Male, Cat. No. 41043, U,S.N.M. 



This is very much like furcatus, new species, but the apical joints 

 of fore tarsi are a little thicker, the third has a long hair below ; this 

 has small but distinct yellow hypopygial lamellae, while those of 

 furcatus seem to be all black; the last section of fifth vein is a very 

 little longer and the cross vein shorter in this form ; the face is silvery 

 white in this and more yellowish in furcatus. 



NOTHOSYMPYCNUS FURCATUS. new species 



Male. — Length 2.5 mm. Face wider above, narrow below, yellow- 

 ish; front dark shining blue, almost violet, ocellar tubercle black; 

 antennae broken off in the type. 



