164 MUSCID^. 



tertius subconicus, secundo duplo longior ; arista pubescens. Alee longce. 



Pedes validi, pilosi. 



Body smooth, shinina;, elongate, nearly linear, with a few hairs and 

 bristles. Erontalia Ijroad ; face oblique ; facialia without bristles ; epi- 

 stoma very prominent. Eyes bare. Proboscis thick, short. Palpi 

 linear. AnteiUKB not reaching the epistoma ; third joint nearly conical^ 

 full twice the length of the second ; arista pubescent along the whole 

 length, more than thrice the length of the third joint. Thorax subfusi- 

 form. JFings long; costal vein ending on the hind border at some 

 little distance from the tip of the wing ; subcostal vein ending at about 

 one-thii-d of the length of the wing; mediastinal vein ending at far 

 beyond half the length ; radial vein ending at about seven-eighths of 

 the length of the costa ; cubital vein ending at the tip of the wing ; 

 cubital and prsebrachial veins very slightly diverging from the pra^bra- 

 chial transverse, very slightly converging from thence to the border ; 

 discal transverse nearly straight, very slightly oblique, parted by very 

 much more than its length from the pra^brachial transverse, and by full 

 half its length from the border. Pobrachial and anal areolets rather 

 long. Abdomen longer than the thorax. Legs stout, hairy. Male. 

 Abdomen nearly linear. Fem. Abdomen fusiform. 



The species inhabit shady woods. 



1. flaveola, P. E. S. iv. 343. 130 (1792); Meig. ; Mcq. ; Zett. 

 Fidva vel testacea, arista subpubescente, thorace nonnunquam quadrivit- 

 tato, alis sublimjndis, abdomine nonnunquam fusco. Long. 3-5 ; alar. 

 8-12 lin. 



Tawny or testaceous. Head pale testaceous beneath. Frontalia 

 bright tawny. Third joint of the antennae brown towards the tip ; 

 arista black, thinly and minutely pubescent. Thorax occasionally with 

 four very indistinct darker stripes. Wings nearly limpid ; discal trans- 

 verse vein parted by twice its length from the pra^brachial transverse. 

 Tarsi brown towards the tips. Var. Abdomen brown ; tip tawny. 



Generally distributed. (E. S. I.) 



2. prseusta, Meig. Zw. v, 257. 3 (1826); Mcq.; Zett. Pulva, 

 antennis luteis, thorace fusco-subquadrivittato, alls fulvo-subchiereis, 

 venis longitudinalibus apice transversisque fusco-nebulosis. Long. 3-5 ; 

 alar. 8-12 lin. 



Tawny. Head testaceous beneath. Prontalia luteous. Antennae 

 luteous ; sixth joint black, tawny at the base. Thorax with four slight 

 brownish stripes. Wings greyish, tawny in front and at the base ; trans- 

 verse veins and tips of longitudinal veins clouded with brotvn. Sutures 

 of abdominal segments blackish. 



Generally distributed. Mr. Spence informs me that he has 

 reared it from truffles. (E. S. I.) 



3. anilis, Pal. Sciora. 16. 2 (1820) ; Meig. ; Zett. Testacea, arista 



