OCCURRING ABOUT HOLYWOOD. 157 



in the female have the last 4 joints dilated ovate, successively 

 diminishing : wings greyish, hyaline : resembles a Campylomyza : 

 the wings are of the same form, and the subcostal nervures even 

 so disposed, but the inner is curved backwards at the transverse 

 nervure, and emits a forked one to the margin, and the hind forked 

 one of Campylomyza is replaced by two separate simple ones. 



Cecidomyia annulipes. 



Meigen's description must have been made from a rubbed specimen. 

 In mine the wings are bluish, with annular rosy spots, appearing 

 in oblique lights, the whole disk clothed with grey down : the tip 

 of the wing has a small velvety spot of a cream colour. 



SCATOPSE B. 

 Metatarsus posticus maris hand abbreviatus, antennarum articuli tres 

 apicales arete connati. 



S. infumata. Nigra, holosericea, alls fuliginosis, halteribus 

 nigris, tibiis antice albis. (Long. .075.) 



Bibio leucopterus. 



Female glabrous black, with slender legs, otherwise like the female 



of B. Marci. 



Occurs at Coombe Wood: also about Holywood. 



B. nigriventris. Fem. Nigra; pedibus rvfis, alls fusco-nervosiSf 

 stigmate nigro. (Long. .26.) 



The male being unknovra, the specific character cannot be fully 

 drawn up. It most resembles B. fuhiventris, with which it 

 agrees in the length of the legs, the distinct nervures, and black 

 stigma : it is smaller, with black body and rufous legs : it appears 

 about a fortnight later than B, Johannis^ for which it seems to be 

 commonly mistaken. 



B. hybridus. 



Half the size of B. lanigerus $ , with which it agrees in general 

 character, wings, and colour ; but the pubescence is more scanty 

 and black, except on the abdomen, where it is somewhat pale : 

 that of the thighs is yellow, in B. lanigerus : from B. ferruginatus 

 $ , it differs by the finer pubescence, more obsolete stigma, rather 

 shorter tarsi, and ferruginous tibiae. 



B. varipes $ . 



Taken at Bexley in the summer, when most of tlie other 

 species had long disappeared. 



