ART. 20 EEVISION" OF THE GENUS WINTHEMIA REINHARD 31 



bristles agree with the other details mentioned in the original descrip- 

 tion. The genitalia are quite alike in structure and show no tangible 

 characters. 



(16) WINTHEMIA RUFOPICTA Bigot 



Chaetolyga rufopicta Bigot, Annales, p. 259, 1888. — Bkauer and Bekgenstamm, 



Sitzungsber. Kais. Mus., vol. 106, p. 349, 1897. 

 Tricholyga fulvidapex Bigot, Annales, p. 265, 1888. 

 Csactolyga fulvidapex Bigot, Brauer and Bergenstamm, Sitzungsber. Kais. 



Mus., vol. 106, pp. 24, 352, 1897. 

 Mystacella tessellata van dee Win.p, Biologia Dipt., vol. 2, p. 56, 1890. 

 Exorlsta cilia ta Townsend, Trans. Amer. Ent. Soc, vol. IS, p. 363, 1891. 

 Winthemia quadripustulata (part) Coquillett, Revis. Tachin., p. 125, 1897. — 



Aldeich, Catalogue, p. 474, 1905. 

 Winthemia rufopicta Bigot, Aldrich, Catalogue, p. 474, 1905. 



This is perhaps the commonest species of the genus in North 

 America. Coquillett misidentified it and listed the form as a syno- 

 nym of quadripustulata in his Revision. This was accepted by most 

 subsequent authors, and our literature now contains many confused 

 records that can not be accepted without verification. 



One of the striking characters of the species is the greatly nar- 

 rowed front in the male sex. In 100 specimens selected at random 

 the front at the narrowest part by micrometer measurements ranged 

 from 0.12 to 0.18 of the head width; only 3 specimens exceeded 0.17; 

 and 86 specimens were within the limits of 0.13 to O.IG. The cheeks 

 in both sexes are uncommonly narrow in profile view. 



Male. — Parafrontals blackish and subshining near vertex, densely 

 gray poUinose downward, clothed with short black hairs thicker on 

 either side of triangle; median stripe brownish or black, narrowed 

 behind but wider than one parafrontal at triangle; inner verticals 

 rather short, outer ones vestigial; orbitals none; frontals 10 to 12, 

 directed inward and extending below middle of second antennal 

 joint, uppermost bristles weak, situated considerably before triangle ; 

 the latter densely haired with a pair of short proclinate hardly 

 divergent bristles; face and cheeks gray pollinose on red ground 

 color ; paraf acial narrow, sparsely to moderately clothed with slender 

 black hairs ; antennae about two-thirds the length of face, black, third 

 joint red near base on inner side, slender, one and one-half times as 

 long as second; arista rather short, slightly thickened near base, 

 penultimate joint usually as broad as long; vibrissae approximated 

 and somewhat above the front edge of mouth; palpi yellow, black- 

 haired to tips, cheek in profile almost linear, about one-fifteenth the 

 eye height; beard white. 



Thorax, black subshining, lightly dusted with gray pollen, marked 

 with five narrow black stripes often indistinct ; scutellum red except 



