38 PROCEEDINGS OF THE NATIONAL MUSEUM vol.79 



by narrower pollinose bands; scutellum red beyond base, lightly 

 dusted with gray pollen ; calypters pale to golden yellow. 



Abdomen black, the sides and apex reddish ; last three segments 

 with wide bands of yellowish-gray pollen, shining on hind margins ; 

 first two segments without median marginals ; third with a marginal 

 row ; fourth with several irregular rows near the apex and entirely 

 covered with bristly hairs in front ; hairs depressed on intermediate 

 segments; venter with sharply defined patches of densely matted 

 hairs on third segment, none on fourth ; inner genital forceps black- 

 ish, tapering rapidly at base and very slender beyond terminating 

 in an acute tip ; outer forceps yellow, usually bearing numerous long 

 black hairs on the outer side, equal the length of inner pair, the 

 width uniform from base outward to near apex which is broadly 

 curved on posterior extremity with the anterior corner pointed and 

 slightly produced. 



Legs black; hind tibiae evenly ciliate; mid tibiae with one large 

 bristle on outer front side near middle; claws and pulvilli elongate. 



Wings subhyaline with a brownish tinge at base extending toward 

 tip on costal border; venation normal; no costal spine; third vein 

 with one or two hairs near base. 



Length, 7 to 11 mm. 



Female. — Unknown. 



j'y^e.— U.S.N.M. No. 43346. 



Described from 20 specimens. Five in the United States National 

 Museum as follows: 1, R. Charape, Peru (4,500 feet), September 

 14, 1911 (C. H. T. Townsend) ; 2, Taboga Island, Panama, February 

 14, 1912 (A. Busck) ; 1, Higuito, San Mateo, Costa Rica (Pablo 

 Schild) ; 1, La Providencia, Obispo, Guatemala (C. M. Rouillard). 

 In Professor Hine's collection: 1 from Panzos, Guatemala, March 

 18, 1905 (J. S. Hine). In the American Museum of Natural His- 

 tory: 8, Corozal, Canal Zone, January-February, 1929 (C. H. Cur- 

 ran) ; 2, Patilla Point, Canal Zone, January (C. H. Curran) ; 2, Cha- 

 pada, Brazil (H. H. Smith) ; 2, Barro Colorado Island, Canal Zone, 

 January, 1929 (C. H. Curran). 



The species resembles W. xanthocera, but may be readily separated 

 in the male sex by the absence of orbital bristles and the elongate 

 claws and pulvilli. The female has not been identified in the mate- 

 rial examined. I venture the opinion that it lacks ocellar bristles as 

 in the male, but xanthocera often has them greatly reduced in size 

 and sometimes also entirely wanting. 



(22) WINTHEMIA SINGULARIS, new specieg 



Plate 1, Figure 3 



Male. — Front at vertex 0.258 of the head width (one specimen), 

 hardly widening for some distance below and thence rapidly to base 



