ACT. 20 REVISION OF THE GENUS WINTHEMIA REINHARD 29 



Legs black; mid tibiae with one long bristle on front side near 

 middle; hind tibiae with a row including two longer bristles on 

 outer posterior edge; tarsi ordinary; claws and pulvilli shorter 

 than last tarsal joint. 



Wings hyaline ; fourth vein curved inward beyond bend and reach- 

 ing costa considerably before tip of wing; first posterior cell open; 

 third vein with one hair at base ; no costal spine. 



Length, 9 mm. 



Male. — Unknown. 



r^ioe.— Female, U.S.N.M. No. 43343. 



Described from a single specimen collected at Kaslo, British 

 Columbia, by R. P. Currie. 



(15) WINTHEMIA DATANAE Townsend 



Exorista datanae Townsend, Trans. Amer. Ent. Soc, vol. 19, p. 288, 1892. 

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

 Aldrich, Catalogue, p. 474, 1905. 



Although the type series, consisting of three male specimens, is 

 apparently lost, the species can be recognized with hardly any doubt 

 from the original description. It is robust in build like cecropiae 

 but may be readily distinguished in the male sex by the narrower 

 front and the elongated claws and pulvilli. 



Front in male 0.192 of the head width (average of five: 0.18; 0.19; 

 0.17; 0.22; 0.2), rather prominent below; median stripe reddish 

 brown, narrowed behind and extending on either side of triangle to 

 vertex; parafrontals pale yellow to golden pollinose more or less 

 blackish and subshining before vertex, thickly clothed with black 

 hairs; face grayish to yellow pollinose, the sides usually more dis- 

 tinctly yellow, conspicuously black-haired; vibrissae situated some- 

 what above the front edge of mouth; cheeks blackish, thinly gray 

 pollinose and subshining in certain views, thickly covered with short 

 black hairs the lower marginal row of bristles weak, in profile about 

 one-seventh the eye height; palpi yellow rather strongly bowed, 

 bearing longish black hairs on lower edge; antennae blackish, first 

 two joints and third near base on inner side tinged with red, the 

 latter joint hardly twice the length of second ; arista reddish, thick- 

 ened on about proximal third, penultimate joint slightly longer than 

 broad; frontal bristles extending to apex of second antennal joint, 

 the uppermost hairlike and situated well before the triangle ; ocellars 

 present; orbitals none; inner verticals moderately developed, outer 

 ones A^estigial; back of head thickly clothed with whitish hairs usually 

 tinged with yellow above. 



Thorax black, subshining, lightly dusted with gray pollen ; mesono- 

 tum marked with five narrow black stripes often poorly defined, the 



