110 C. H. TYLER TOWNSEND. 



joint more or less rufous, third joint more than three times as long as second ; 

 vittfe and macrochfetse same; claws and pulvilli short. Wings with one costal 

 spine, the costo-apical region yellowish infuscated, fourth vein with distinct, 

 wrinkle at bend ; tegulfe nearly white, or slightly yellowish on border, halteres 

 pale tawny, knobs whitish. Length of body 4.5 mm. ; of wing 3 mm. 



Described from one specimen ; Carlinville, 111. (Chas. Robertson). 



SARCOTA€HIlVEL,l.A n. gen. 

 Black and grayish, more or less shining species of rather small 

 size, with the habitus of the Sarcophagidse. Belongs in Tachininse. 

 Head quadrilateral in profile, the frontal outline sloping; front a 

 little prominent, about two-sevenths width of head in % , n little 

 wider at vertex and before, face twice as wide as widest part of front; 

 frontal bristles in a single row descending about as low as base of 

 third antennal joint, vertical bristles strongest and directed strongly 

 backward, next two bristles also directed backward, the rest inward ; 

 no orbital bristles in h . Face nearly perpendicular, epistoma some- 

 what prominent; facial depression three-fifths width of face, wider 

 below, more or less triangular in outline, rather shallow; facial ridges 

 bare, except a few bristles above vibrissre, well constricted below ; 

 sides of face moderately wide, with a few bristles below near orbital 

 margin ; cheeks moderately wide, fully one-third of eye-hight, some- 

 what hairy posteriorly, with a row of bristles on lower border; vi- 

 brissa moderately strong, decussate, inserted on oral margin. Eyes 

 bare, descending fully three-fourths as low as oral margin. Antennae 

 shorter than face, second joint rather elongate, third joint hardly 

 one and one-half times as long as second, moderately wide, posterior 

 apical corner rounded ; arista moderately long, thickened on basal 

 third, rather long pubescent on thickened portion, apparently o- 

 jointed, basal joints short. Proboscis about as long as hight of 

 head, stout, labella rather large; palpi well developed, club-shaped, 

 considerably thickened toward tip. Thorax about as wide as head ; 

 scutellum with a weak, apical, strongly decussate pair of macroclijetse, 

 a suba[)ical pair extending about to middle of third abdominal seg- 

 ment and a shorter lateral pair. Abdomen no wider than thorax, 

 rather elongate-conical in outline, vaulted, not flattened ( Z ), first 

 segment hardly shortened ; macrochastre only marginal ; hypopygium 

 of nmle exserted. Legs of moderate length, somewhat bi'istly, espe- 

 cially the middle and hind tibiae ; claws and pulvilli of Z consider- 

 ably elongated. Wings somewhat longer than abdomen, with strong 

 costal spine, third vein bristly part way to small cross-vein ; apical 



