DIPTEROUS TRIBE OF SPH^ROCERID^. 329 



evidently dilated in the male, in which also the fore shanks are 

 clavate and furrowed, and the hind feet have two joints dilated : 

 poisers brown or blackish : wings rarely hyaline, generally dusky : 

 nerves darker ; base of the costal ciliate with short hairs ; the 2d 

 ending nearer to the 3d than 1st: interval of the cross nerves 

 generally one-half longer than the principal one. (Length 1 ; 

 wings 2\ lines, sometimes less.) 



In profusion every where on dunghills and hotbeds, more 

 rarely on fungi. 



Sp. 7. L. ochripes. Nigra capite pedibus que rujis ; tarsis 

 postieis nigris. 



Borborus ochripes, Meig. VI. 209. No. 29. 

 Limosina ochripes . Macq. S. a B. II. 572. No. 5. 



Head tawny red, a dot on the crown, and the occiput black ; antenna? 

 black, or red at the base : arista very delicately pubescent : thorax 

 and abdomen black : scutel shorter than metathorax : legs pubes- 

 cent, tawny ; hind feet, generally also the fore pair and ends of 

 fore shanks, blackish ; middle shanks with few bristles ; 2d joint 

 of hind feet linear, twice as long as first : poisers whitish : wings 

 almost hyaline : nerves pale ; base of the costal pubescent ; 2d 

 half way between 1st and 3d; interval of cross nerves nearly 

 twice as long as the principal one : generally larger than the 

 preceding. 



Not rare on sandy coasts of Ireland. New Forest, and near 

 London ; Mr. Walker. 



Sp. 8. L. scutellaris. Nigra scutello aterrimo ; facie, coxis, 

 genubus que testaceis ; halteribus albidis ; tarsorum posti- 

 corum articulis duobus incrassatis. 



Like the last in character : head black, face and fore margin of 

 the front pale testaceous : thorax glossy black : scutel elongate, 

 opaque, deep black : abdomen dull black : shanks and feet dusky : 

 the fore coxae, the base of the shanks, often the entire of the middle 

 shanks and feet testaceous or rust brown : 2d joint of the hind feet 

 twice as long as the first, and thickened : poisers whitish : wings 

 hyaline, with pale brown nerves, the costal darker ; 2d terminating 

 much nearer to the 3d, which does not quite reach the tip of the 

 wing : smaller than No. 6. 

 With No. 6, but not common ; north of Ireland. Near 



London ; Mr. Walker. 



NO. IV. VOL. III. u u 



