322 BRITISH SPECIES OF THE 



the winter. The identity of Meigen's insect, wliich is described 

 as having a testaceous face, is doubtful. I have deferred to 

 the authority of Macquart in uniting them. 



Sp. 2. B. suillorum. Niger nitidus, halleribus albidis ; alls 

 ferrugineis, nervis transversis infuscatis. 



Mycetia tibiahs, Rob. D. 806. No. 2. 



Very like the last : the bristles on the outside of the middle shanks are 

 much finer ; the legs more slender ; the thighs of male unarmed, 

 and only the fore pair thickened ; the 2d joint of the hind 

 feet slender : the posterior coxae, the trochanters and feet, and the 

 extreme base of the shanks, are rust brown, the fore and hind feet 

 darker : the cross nerves of the wings are constantly suffused 

 with brown. (Length 1| ; wings, 3 lines.) 



Inhabits fungi in England and Ireland, but is rather uncom- 

 mon. I cannot determine whether Macquart's 9th species 

 may not be the same, though the great difference of size makes 

 it less likely. In any case the name punctipennis will have 

 to be dropped, as it is already used by Wiedemann. 



Var. /3, — Shanks and feet ferruginous ; end of the fore slianks and 

 base of the fore and hind feet brown. 



Mycetia communis, Rob. D. 805. No. 1. 

 Taken by Mr. F. Walker near London. 



Sp. 3. B. niger. Niger, opacus, villosus, halteribus fuscis ; 

 alls hyalinis. 



Borborus niger, Meig. VI. 201. No. 6. 

 Macq. S. a B. II. 566. No. 3. 



Dull black, hairy : a glossy line down the front : arista thickly 

 pubescent : thorax slightly tinged with green : segments of the 

 abdomen nearly equal : knees and feet dusky : fore thighs thick, 

 hairy : first joint of the fore feet unguiculate at the tip in the male ; 

 middle shanks with strong bristles or spines on the outside ; the 

 2d joint of the hind feet scarcely thickened : poisers dusky : 

 wings obscurely hyaline, with brown nerves. (Length 2| ; 

 wings, 4^ lines.) 



Not common in Ireland ; generally on mountain heaths. 

 Mr. Walker has taken a specimen in England. 



