310 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



are being placed in the U. S. National Museum collection and one 

 each in the collections of A. H. Sturtevant and George Steyskal; the 

 remainder are in the author's collection. 



Latheticomyia lineata^ new species 



Figure 2,c,d 



Male and female: Face tan in middle, whitish on facial orbits, 

 cheeks whitish becoming tan behind and below, that portion below the 

 row of oral hairs tan to brown and conspicuously shining; vibrissa 

 single, thin, followed by an irregular row of 8-10 hairs ending with 

 the buccal bristle; tiny hairs of upper face scarcely visible on the 

 only male due to a partial collapse of the head, but on the females 

 there are 10-15 black hairs, easily visible. Clypeus tan to brown, 

 narrow; palpi tan with coarse black hairs; proboscis pale. 



Front with color pattern as in figure 2,c; orbits whitish yellow to 

 just beyond middle orbital, this yellow area continuing broadly onto 

 rear of head on each side; dark part of front burnt brown in color with 

 the postlunular area more orange and beset with small scattered 

 hairs. Antennae mostly brown, becoming pale yellowish only on 

 lower inner surface; arista dark, microscopically pubescent. Anterior 

 orbital bristle about two-thirds the length of the other two. 



The color pattern of the mesonotum is shown in figure 2,c, but in 

 general the contrast between light and dark areas is not so striking 

 as in tricolor and infumata; similarly, in figure 2,d, the contrast of 

 colors on the legs is not as extreme as shown. The dark areas of 

 the mesonotum are bro^vnish with thin poUinosit}^, with the median 

 yellow area continued anteriorly along the dorsocentral Unes to a 

 varying degree, only rarely reaching the humeral yellow area. The 

 pale streak between the alar and dorsocentral bristles may also be 

 largely obliterated. 



Scutellum mostly yellow, the brown being limited to the basal 

 angles; disc with scattered black hau-s; basal scutellars two-thirds the 

 length of second pair, the latter about one-third the length of the 

 apical pair. Acrostichal hairs irregularly 4-6 rowed at the sutural 

 level, reduced to two rows on the yellow area posteriorly, the pre- 

 scutellar pair only a little enlarged. Prescutellar dorsocentrals 

 noticeably larger than the four anterior ones. Halteres yellow. 



Abdominal tergites dark brown with their apical margins creamy 

 yellow. In the only male the genitalia are obscured by the legs but 

 appear to be of the same general type as in tricolor. 



Body length of female (abdomen extended), 3.5 mm. ; wing, 2.8 mm. 



Types: Holotype female, USNM 62898, Horse Thief Basin Recrea- 

 tion Area, Prescott National Forest, about 25 miles south (airline) 

 of Prescott, Ariz., June 18, 1951. Paratypes as follows: 1 female. Oak 



