1891.] 125 



G.— GERMARIA, Dsv. 

 Gen. c7i. — This genus is closcl}^ allied to Cro?/i«, and tlio single 

 species which it contains has generally been included in it; the chief 

 points of difference between thorn are that in Gcrmnria there is less 

 tumidity of the cheeks, which are also less setose ; there is greater 

 obliquity of the facial angle ; the facial ia are ciliated along the lower 

 part of their edges ; and the fronto-orbital bristles arc stronger, and 

 extend lower down. 



G. RUFiCEPS, Fin. 

 This fly is black, covered with slate-grey tomentum ; the palpi are yellow ; the 

 antenna; have the first two joints rufous, and the third black ; the arista has the 

 second and third joints of nearly equal lengths ; the thorax has four black lines ; 

 the abdomen is oblong, with tlie second, third, and fourtli segments encircled with a 

 broad whitish band, and hns no discal sctoe ; the wings are armed with a number of 

 small spines at the bases of the first and third veins, and there is a short cubital 

 appendix. Rare ; it is figured in Curtis's British Entomology. 



7.— SIPHONA, Mgn. 



Gen. ch. — The little grey flies contained in this genus are charac- 

 terized by having a long, filiform, horny proboscis, which is twice bent 

 or elbow-ed ; and also by the arista being bent towards the middle, at 

 the junction of the second and third joints, the former of which is a 

 good deal elongated, being more than half as long as the latter; the 

 eyes are bare ; the orbito-frontal bristles are in a double row (on eacb 

 side) in both sexes ; the antennae are rather long, the third joint being 

 two or three times the length of the second ; the abdomen has all the 

 rings of nearly equal width, and without seta) on the disc ; the wings 

 have the apical cross veins rounded at the base, and the first posterior 

 cell terminating near the apex of the wing. 



The frontalia are nearly of equal w'idth in both sexes, and the 

 orbito-frontal bristles being always in a double row, it is difficult at 

 first sight to distinguish the males from the females, owing to whicb 

 causes they have been separated, and described as distinct species ; 

 they may, however, be known from each other by the following 

 characters : the third joint of the antennae is about three times the 

 length of the second in the males, and only about twice as long in the 

 females ; the abdomen is rather narrow and subcylindrical in the males, 

 and thickened at the apex, in the females it is rather wider and flatter, 



