THE MYCETOPHILID.t; of north' AMERICA. 247 



bb. Subcostal vein ends opposite or proximad of the base of 

 the radial sector. 

 c. Wing with several distinct brown spots, tibiae each with 

 but a single spur, 

 d. Dorsum black with central stripes, fore metatarsus 

 about equal to tibia in length. West Indies, 



6. pictipeniiis. 

 dd. Thorax opaque brownish black, often with yellow 

 central stripe ; sides, pleura and scutellum yellow ; 

 fore metatarsus shorter than its tibia. Atlantic 

 States. 7. elegans. 



CO. Wing with only a single preapical fascia, or wholly 

 uniform in color, 

 d. Wing without a band or fascia near apex. 

 e. Mesonotum mainly black or dark brown. 



f. Length 2 mm; subcostal crossvein apparently 

 wanting; anal vein not produced to margin; 

 female. Eastern vStates. 8. iiiiinitla n. sp. 

 ff. Length over 3 mm. 



g. Subcostal crossvein wanting; thorax and 

 abdomen black; apex of wing smoky; 

 length 6 mm. 9. nielasoma. 



gg. Subcostal crossvein present, situated far 

 proximad of middle of subcosta; anal vein 

 produced to margin, 

 h. Scutellum, pleura and hind margins of abdo- 

 minal segments yellow, 

 i. Metanotum yellow. lo. pullata. 



ii. Metanotum black; fore metatarsus short- 

 er than tibia. 4. sctigcr n. sp. 

 hh. Thorax wholly black, except humeral angle 

 and at base of wings; hypopygium small 

 (fig. 92). II. nigrita n. sp. 

 ee. Predominant color of mesonotum yellow. 



f. A blackish spot on the proximal part of hind 

 coxa; and adjacent portion of pleura ; abdo- 

 men reddish yellow ; wing with feebly marked 

 band before the tip; length 8 mm. 



12. notabilis. 



