246 MAINE AGRICUI,TUll-\Iv EXPERIMENT STATION. I909. 



6. Genus Platyura Meigen. 

 Platyura Meigen, Illiger's Mag. II. 264. 1803; Klass I. loi. 1804. 

 Zelmira Meigen, Nouv. Class. Mouches. 16. 1800. (without 



type). 



Head small, ocelli closely approximated, median smallest; 

 palpi 4 jointed; antennse 2-}-i4 jointed, cylindrical or somewhat 

 compressed, closely sessile. Thorax oval, setose; abdomen with 

 7 visible segments, depressed apically. Legs long, femora 

 somewhat thickened; tibioe spurred, setae very minute. Wings 

 (figs. 84, 85, 86) somewhat broadened, as long or longer than 

 abdomen; costa prolonged beyond the tip of R^-I-b and ending 

 before the tip of the wing; subcosta ends in the costa, rarely 

 ending free, subcostal crossvein usually present, R2+3 very short 

 usually ending in the costa, rarely in Ri; prefurca of media 

 short; anal vein either incomplete or produced to the margin. 



Table of species. 

 a. R2+3 ends in Ri; subcostal crossvein wanting (fig. 85); 

 tibiae each with but one spur. Length 2 mm. West 

 Indies. i. parva. 



aa. R2+3 ends in the costa, beyond the apex of Ri. 



b. Subcostal vein ends noticeably beyond the base of the 

 radial sector. 

 c. A distinct transverse fascia or band at or near the apex 

 of wing, or wings with several spots, 

 d. Wing with band; thorax brown, a median stripe on 

 posterior half and sides yellowish, abdomen dusky, 

 bases of segments yellowish, halteres with black 

 knob. Length 10 mm. Washington. 2. fasciola. 

 dd. Wing spotted ; length 3 mm. 7. elegans. 



cc. Apex of wing hyaline or only indistinctly smoky, no 

 band, 

 d. Apices of abdominal segments black; fore metatarsus 

 longer than its tibia; length 4^ mm. 3. inops. 



dd. Apices of abdominal segments, yellow. 



e. Thoracic vitt^ black; fore metatarsus shorter than 



tibia. 4. setiger n. sp. 



ee. Thoracic vittse reddish yellow. Washington State. 



5. hirida. 



