NORTH AMERICAN DIPTEKA. 97 



more or less interrupted black vittte, covered with hairs and long bristles; scu- 

 telluiu testaceous, darker at base. Abdomen black, segments two to four broadly 

 silvery at base, especially fourth segment, the black with a golden brownish 

 reflection ; first and second segments with a median marginal and a lateral pair 

 of macrochsetse ; third segment with six or eight marginal macrochsetse ; fourth 

 segment armed with marginal and submarginal macrocliajtie ; the whole abdo- 

 men clothed with rather long hairs, especially the hypopygium; venter more 

 or less silvery. Legs black, somewhat silvery, especially the front femora, the 

 tibiae furnished with spiny bristles; pul villi yellowish white. Wings grayish 

 hyaline, slightly yellowish at base; tegulie white, borders slightly yellowish: 

 at base; tegulse white, borders slightly yellowish ; lialteres fu-scous. Length of 

 body about 11 — 13 mm. ; of wing 9.5—11 mm. 



Described from seven specimens ; Michigan, South Dakota. 



Tachiiiomyia flori<lensisD.sp. % .—Eyes and frontal vitta light brown ; 

 sides of front, face and cheeks, .silvery gray; vertex and front with a slight 

 brassy tinge; anterior pair of ocellar bristles strongest, directed forward and 

 strongly outward; antennae brownish black, the first two joints dark rufous, 

 proboscis brownish, palpi very long and bristly, reddish yellow, occiput silvery 

 cinereous, very thickly clothed with long yellowish gray hair. Thorax blackish, 

 more or less silvery-cinereous poUinose, with four heavy blackish vittae, the 

 outer ones interrupted at the suture, the inner ones appearing double; scutellum 

 orange-rufons, blackish at base. Abdomen dark rufous, very hairy and bristly, 

 discal portion of first to third segments blackish, the first segment broadly and 

 the third narrowly so, bases of second and third segments narrowly and base of 

 fourth widely silvery ; first and second segments with one or two lateral macro- 

 chfetse and a median marginal pair, third with eight or ten marginal, and anal 

 with a thick row of marginal interspersed with long hairs and a submarginal 

 pair; hypopygium dark rufous, thickly hairy. Legs black, knees pale rufous, 

 front femora silvery on outside, femora hairy and bristly, tibiae with macrochaetae ; 

 claws and pulvilli very long, claws brownish, pulvilli brownish yellow. Wings 

 grayish hyaline, slightly pale tawny at base; tegulae nearly white, halteres 

 brownish rufous. Length of body fully 16 mm.; of wing 13 mm. 



Described from one specimen ; Florida (C. W. Johnson). 



n.F>0<'H.ETA n. gen. 



Moderately small black species, with abdominal segments silvery 

 at l)ase. Belongs in Tachinina'. Head rather triangidar in profile; 

 front prominent, front ( $ ?) fully one-third width of head at vertex, 

 wider in front, face slightly wider, about one-half width of head ; 

 frontal bristles in a single row, descending below base of third an- 

 tenna! joint, some bristly hairs outside them, three posterior bristles 

 of each row strongest and directed backward ; no orbital bristles. 

 Face receding, epistoma not prominent; facial depression occupying 

 nearly whole width of face, fully four-fifths, rather oval in outline, 

 wider below, moderately deep; facial ridges bristly about half way 



TEA.NS. AM. ENT. SOC. XIX. (13) M.\Y, 1892. 



