28 PEOCEEDIXGS OF THE NATIONAL MUSEUM vol. 79 



Legs rather stout, black, the knees reddish; mid tibiae Avith one 

 large bristle near middle on outer front side ; hind tibiae eiliate, the 

 bristles not very closely placed, one near middle stouter and longer 

 than the rest; claws and pulvilli as long as last two tarsal joints. 



Wings grayish hyaline, slightly inf uscated near base ; venation as 

 usual ; third vein with one or two hairs near base ; costal spine very 

 minute. 



Length, 10 mm. 



Female. — Unknown. 



Tyfe. — In the American Museum of Natural History. 



Described from one male received from C. H. Curran, collected at 

 Transcona, Manitoba, Canada, June 24, 1924 (G. S. Brooks). 



Although the genitalia are almost identical with those of sinuata., 

 the species may be readily distinguished by the more prominent 

 front and strongly receding face; the abdomen is darker on the 

 sides and the fourth segment with a much narrower pollen band. 

 There are other minor differences. 



(14) WINTHEMIA INTONSA, new species 



Female. — Front at vertex 0.3 of the head width (one specimen),, 

 rather prominent below, the sides thickly covered with dull pale- 

 yellow pollen and bearing scattered fine short hairs; median stripe 

 reddish, not much narrowed before triangle; verticals two pairs; 

 ocellars and orbitals present; frontals descending to apex of second 

 antennal joint, the uppermost two or three bristles in each row 

 stout but not very long, reclinate; antennae reddish, third joint one 

 and one-half times the length of the second; arista long, slender, 

 with a short penultimate joint; sides of face dull pale yellow, thickly 

 clothed with rather coarse black hairs, not much narrowed down- 

 ward; vibrissae situated on lower edge of face; cheeks covered with 

 dense grayish pollen, about one-eighth the eye height ; palpi yellow ; 

 occiput thickly pale-haired. 



Thorax black, gray pollinose, with four dark dorsal stripes and 

 a median one apparent behind the suture in some views; scutellum 

 reddish on apical half, gray pollinose, bearing only two lateral 

 bristles besides a smaller decussate apical and a discal pair; calyp- 

 ters opaque, white. 



Abdomen black in ground color; the intermediate segments en- 

 tirely covered with dense gray pollen; fourth segment wholly red, 

 with reflecting changeable spots on the basal margin above; first 

 segment without median marginals; second with one stout pair; 

 third with a marginal row of about 12; fourth with irregular 

 placed smaller discals and a marginal row ; hairs on dorsum rather 

 long and coarse but depressed. 



