NORTH AMKRICAN DIPTEUA. 181 



costal spiin', third Vfin opined at base; apical cell closed in tip of 

 wing; fourth vein curved at hend, apical cross-vein bowed in; iiind 

 cross-vein straight, a little oblique, in middle between small cross-vein 

 and bend of fourth. Type, T. florklensis n. sp. 



Ta<*lliilO|>liyto florideiisis n. sp. 9.— Eye.s brown, frontal vitta l>ro\vn- 

 ish ; sides of fi-ont, face and cheeks silvery-white, vertex somewhat cinereous, 

 anterior pair of ocellar bristles strongest, directed forward and outward : antennre 

 and arista hlackish. second antennal joint bi'ownish at base; proboscis brown, 

 labella tawny; palpi deep yellow, dusky at base; occiput cinereous, sparsely 

 srayhairy and black-biistly. Thorax silvery cinereous, with two narrow black- 

 ish vittiB, and an outer less distinct one, interrupted at suture; scutellum silvery 

 cinereous. Abdomen shining black, bases of segments two to four silvery at 

 base, in some lights the whole abdomen appearing more or less silvery, first and 

 second segments each with a lateral one and a median marginal pair of niacro- 

 chsetffi, third with eight, and anal with six or eight marginal. Legs black, 

 femora more or less distinctly silvery, femora and tibiie bristly; pul villi small, 

 yellowish white. Wings grayish hyaline, tegulfe nearly white, halteres tawny, 

 knobs dark rufous. Length of body 5.5 mm. ; of wing 4 mm. 



PSEIDOWYOTHYRIA n. gen. 



Small blackish species, with thorax and bases of abdominal seg- 

 ments silvery- Belongs in Phytoinae. Head rather triangular in 

 profile, oral profile short; front (9 "?) nearly one-third width of 

 head, nearly equal in width, somewhat prominent in profile, face a 

 little wider; frontal bristles in a single row, rather strong, descend- 

 ing about to base of third antennal joint, vertical and second next 

 pair strongest, about equal, the vertical and next three pairs directed 

 backward, rest more or less inward ; two orbital bristles ( 9 ?). Face 

 receding, epistoma hardly prominent ; fiicial depression about two- 

 thirds width of face, somewhat triangular in outline, moderately 

 deep; facial ridges bri.stly not quite to base of third antennal joint, 

 constricted below; sides of face narrow, bare; cheeks narrow, 

 about one-sixth eye-hight, more or less bristly below ; vibrissa* mod- 

 erately strong, decussate, inserted a little above oral margin. Eyes 

 bare, descending almost as low as vibrissje. Antennje but little 

 shorter than face, second joint hai'dly elongate, third joint fully 

 three times as long as .second, narrow, po.sterior apical corner roun<le(l ; 

 arista moderately long, microscopically pubescent, thickened on basal 

 half, indistinctly jointed at base. Proboscis short, rather stout, la- 

 bella developed ; palpi elongate, club-shaped, thickened toward tip. 

 Thorax not wider than head ; scutellum with a short apical pair of 

 macrochpetae, and three strong lateral pairs, the posterior lateral pair 



TRANS. AM. ENT. SOC. XIX. JUNE, I6i)2. 



