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C. R. CROSBY : CHALC1S-FLIES KROM ZUMBO 



8; 



ríorly, moderately concave, with the anterior elevation largc and 

 regularly rounded ; mesonotum and scutellum (inely and regularly 

 reticuíate-punctate ; on the scutellum the reticulation is distinctly 

 longitudinal. Base of scutellum one fourth as wide as anterior tnarr 

 gin of axilla. Large pleural plate rather coarsely reticulate-punc- 

 tatc around the margin, the punctures becoming gradually íiner 

 and denser toward the center. Post-scutellum very short, the late- 

 ral trans verse ly triangulate pprtions connected by a narrow band. 

 Propodeufn transverse, lateral margins rounded, spiracles large, 

 oval. 



Antenn.c gently clavate, with scape yellow. Fiagellum brown- 

 ish ; scape long, slender and curved outward ; pedicel obconic, as 

 long as first and second funicle joints ; first joint one halí as long 

 as second; succeeding joints slightly shorter and distinctly broad- 

 er ; club rounded at tip and consisting of three closely united 

 joints. Legs brown, middle and posterior knees and tip of tíbia? 

 yeMowish, posterior tarsi lighter than the others. Anterior femora 

 considerably compressed and widened beneath. Middle tarsal joint 

 armed beneath with short, blunt, black spines as follows : first 

 joint, two doubie rows, the outér rows of about 12 spines and the 

 inner ones shorter; second joint, two rows of 4 or 5 spines each ; 

 third joint. two or three on each side ; fourth a single pair near 

 the tip. Wings hyaline except for a narrow longitudinal triangular 

 area along posterior margin which is infuscate ; marginal vein a 

 little shorter than submarginal, post marginal and stigmal about 

 equal ; stigmal vein slightly curved forward, club small, claw of 

 club long and straight and extehding farther toward tip of wing 

 than the club. Area back of sub-marginal bare except for a few 

 scattered hairs, rest of wing densely clothed with tine hairs ; area 

 back of marginal with much coarser hairs, margin ciliate. Four alar 

 sensória arranged in a straight line on the claw of stigmal club. 



Abdómen brown. broadest at the íifth segment, rounded be- 

 hincl ; second segment two-thirds as long as wide ; third short ; se- 

 cond and third deeply incised behind ; fourth and fifth sub-equal, 

 medially emarginate ; sixth a little longer than second, posterior 

 margin entire ; seventh one-third as long as sixth and with poste- 

 rior margin and median longitudinal line white. Basal segments re- 



