326 BRITISH SPECIES OF THE 



Sp. 1. A. pedestris. * 



Borborus pedestris, Meig. VI. 209. No. 30. 



Apterina pedestris, Macq. II. 574. No. 1. 



Dull black, hairy : arista pubescent : scutel very obtusely trian- 

 gular : abdomen of male short, clavate, 2d segment very 

 large, with a longitudinal line ; those which follow very short, 

 the last large : legs long and hairy ; thighs thick, especially the 

 fore pair ; hind shanks with a curved spur ; 2d joint of the feet 

 twice as long as the 1st, not thickened; 1st joint of the fore 

 pair unguiculate in the male : poisers abortive, dusky : wings 

 shorter than the thorax : nerves disposed as in Borborus, but 

 indistinct ; the 2d cross nerve falling on the margin, and forming 

 a continuation of the costal. (Length li — If line.)] 

 Mr. Dale has taken this species in Dorsetshire. I found it 



near London. It occurs in the north both of Germany and 



France. 



Gen. IV. — Limosina. 



Arista pubescens basi geniculata. Areola analis incompleta. 

 Nervi transversi approximati. Nervi longitudinales 4 US . 

 et 5 US . abbreviate. 



Borborus A. e. Meig. VI. 207. 



Limosina . . Macq. S. d B. II. 571. VII. 



Front bristly : arista pubescent, the 1st joint a little elongated : 

 scutel large, flat, with long bristles : middle legs elongated, the 

 shanks usually with lateral spines or bristles ; no spur at the end 

 of the hind shank : costal nerve of the wing often bristly at the 

 base; the 2d main nerve distant from the tip; the 4th and 5th 

 vanishing beyond the principal cross nerve, which is remote from 

 the margin : no anal cell, nor any complete one above the dis- 

 coidal. 



A. Antennce oblique porrectce. 



B. Scutellum disco glabrum, nudum. 



C. Segmentum 4 tum . abdominis in mare ulrinque cirrosum. 



Sp. 1. L. silvatica. Nigra nitida, alis subhyalinis ; halte- 



ribusfuscis. 



Borborus silvaticus, Meig. VI. 207. No. 24. 



■ Curtis, B. E. 469. No. 24. 



Limosina silvaticus, Macq. S. a B. II. 572. No. 1. 



Mycetia claripcnnis, Rob. D. 806. No. 3. 



