ART. 20 REVISION" OP THE GENUS WINTHEMIA REINHARD 47 



tarsi smaller, and the parafacials narrower. There are other minor 

 differences. The type specimen in the United States National 

 Museum was determined Hemimxisi'poda pinguis by Dr. C. H. T. 

 Townsend. 



(28) WINTHEMIA ANALIS Macquart 



Plate 1, Fiqubb 7 



Miorotrichodes analis Macquaut, Dipt. Exot., suppl. 1, pp. 288-289, 1846. — 

 Beauee, Sitzungber. Kais. Mus., vol. 106, p. 367, 1897. 



Very similar to pinguis, but with the front distinctly broader and 

 with a partial secondary row of frontals outside the main rows 

 below. 



Male. — Front at vertex 0.323 of the head width in the one speci- 

 men. The abdominal cross bands broad as in pinguis and in dorsal 

 view occupying about one-half the length of the segments. Venter 

 with sharply defined patches of dense hairs on third and fourth 

 segments. Outer genital forceps yellow, triangular, about two-thirds 

 as long as inner ones, the tips evenly rounded or blunt ; inner forceps 

 brownish, united except near apex, keeled behind and tapering uni- 

 formly from base outward. 



Length, 10 mm. 



Type. — In collection of J. E. Collin, Newmarket, England. 



Redescribed from a single male specimen in the United States 

 National Museum from Rurrenabaque, Beni, Bolivia (Wm. M. Mann, 

 Mulford Exploration). This specimen was compared with the type 

 in 1929 by Dr. J. M. Aldrich. The National Museum contains a 

 second male specimen labeled Catamarca, Argentina, 1927 (Kisliuk 

 777), which has the same wide front including the partial secondary 

 row of frontal bristles, but the calypters are largely white and the 

 pollen on the abdomen is not disposed in defined cross bands. It is 

 doubtfully included here. 



(29) WINTHEMIA SEXUALIS Curran 



Winthemla sexualis Cueban, Amer. Mus. Nov. No. 260, p. 7, 1927; Dipt. Porto 

 Rico, p. 109, 1928. 



The uppermost frontal bristles stronger than usual, reclinate, 

 situated about in line with anterior ocellus ; venter of third abdomi- 

 nal segment with defined patches of dense hairs, none on fourth; 

 hind tibiae sparsely ciliate with one longer bristle in the row near 

 middle. Female sex unknown. 



Male. — Front 0.212 of the head width in the one specimen, dis- 

 tinctly narrowed before triangle, thence widening rapidly to base of 

 antennae; parafrontals grayish -yellow pollinose to vertex, bearing 

 a few scattered hairs outside of the frontal rows; median stripe 



