Collin — Notes on Specimens of Borhoridce and some Ephydridce. 245 



" Black, pubescent : face reddish : arista thickly pubescent : legs 

 nearly naked, dusky ; the fore pair, the knees and shanks rust-brown : 

 middle shanks with a pair of bristles only on the outside : poisers brown : 

 wings brownish : the costal nerve a little bristly at the base ; 2d nerve 

 as in the last : interval of the cross-nerves not longer than the small 

 one. (Less than No. 18.) 



" In the same situations." 



The comparatively small distance between the two cross-veins renders this 

 species easy of identification. Several specimens in the collection. 



16. Idmosina fuscipennis Hal. — Originally (1833) described as follows : — 



" B. fuscipennis. Niger, pedibus piceis, thorace scutelloque ferruginosis 

 setosis, alisfuscis, halteribus luteis. (Long. "09.) 



" Resembles B. Uniosus, but is smaller, and the wings darker : the 



disk of the scutel, as well as the thorax, set with bristles ; both have a 



very dull ferruginous tinge : 1st joint of hind feet very broad, 2d twice 



as long, scarcely at all thickened : seta of antennae black. 



" Common on marine rejectamenta." 



This description might be said to apply to ferruginata Stenh., but in 



reality was made evidently from somewhat immature specimens of a quite 



distinct species, as may be gathered from Haliday's redescription of the 



species in 1836 ; moreover there were no specimens of ferruginata in the box 



containing Haliday's Borhoridce, but there were six specimens of a species near 



liniosa with the same bristly base to costa, distinct spine on middle trochanters 



and incurved bristles on front of thorax, but having, in addition to the 8 



marginal bristles on seutellum of lutosa,fontinalis, &c., two other stout bristles 



surrounded with minute bristles and situated on the disc, one at each side ; 



the middle femora of the male also bear a small distinct spine at the base 



beneath. 



17. Limosina vagans Hal. — Originally (1833) described as follows : — 



" B. vagans. Niger, opacus, sciitello piibescente, alis denigratis, 

 halteribus luteis. (Long. '06.) 



" Resembles B. Zosterw, but the disk of the scutel is pubescent and 

 not so flat : feet short, fore pair a little dilated." 



This description was elaborated considerably in 1836, and as the species 

 has not been recognized on the Continent, and the work in which it was 

 redescribed is difiBcult to obtain, it may be as well to quote the redescription 

 in full. 



2q2 



