178 'Jn\y, i 



discul niid marginal sctao are present ; wings yellow, first posterior cell partly open ; 

 legs grey, with upper surfaces of the femora and tarsi black, and tibiae ferruginous ; \ 



the legs are paler in the female than in the male. Very rare. \ 



i 



F. NIGRICANS, Egg. 

 Black and glabrous ; frontal stripe piceous, about as wide as the sides of the 

 frontalia, which are rough and vesicular, of a grey colour, with black reflections ; 

 fronto-orbital setae large, and reaching to the end of the second antennal joint ; i 

 cheeks white, with dark reflections, and ciliated with a row of small hairs, which 1 

 extend half way down the face ; facial setse long and strong, extending more than ', 

 half way up the face ; vibrissa? large ; antennae grey, with the third joint thick, and I 

 from five to six times longer than the second ; arista thickened to the middle ; palpi 

 black ; thorax black and shining, the front margin, with the shoulders and sides 

 being clothed with white pubescence, it is marked by four longitudinal black stripes, '■ 

 the middle pair being narrow, and the outer ones wide ; there are four post-sutural j 

 outer dorso-central bristles ; scutellum black, with the apex sometimes rufous ; j 

 metathorax light grey ; abdomen black, glabrous, and spinose, with seta) both on 

 the disc and margin of the segments, and having a band of white reflections on the 

 front margins of the last three rings, which is complete on the second ring, but only 

 marked on the sides of the others ; legs black. Yery rare ; I have only seen one 

 example, which I captured at Windermere, in June, 1884. 



Schiner refers the Fabricia facta, of Meigen, to this genus, and states that 

 Frontina austera, of the same author, is only the female of the same species. I 

 have a continental specimen of F. austera, which possesses the characters peculiar 

 to the genus Frontina, but those described by Meigen and Walker as belonging to 

 F. pacta are so different (the frontalia of the male being narrow, and the antennae 

 shortened), that I think the two flies cannot be referred to the same genus, or belong 

 to the same species. 



37.— BAUMHAUERIA, Mgn. 



Gen. ch. — Head large ; eyes small and nude ; frontalia very wide, 

 and witb the face somewhat swollen ; cheeks sometimes hairy ; an- 

 tennae long, the third joint being fully six times as long as the second ; 

 facialia ciliated ; wings with the first posterior cell closed at the apex, 

 or, a little, before it. 



This genus bears such a close affinity to the former, that I have 

 placed them in juxtaposition, out of their proper order in my list ; 

 their characters are so much alike that it is difficult to know in which 

 to place certain species, thus, F. Iceta is sometimes called a Bau7n- 

 haueria, and B. marmorata a Frontina : the typical species of the 

 former genus is B. goniceformis, Mgn., in which the first posterior cell 

 is quite closed, and has a short stalk, it has not, however, been found 

 in Britain 



B. MARMOllATA, F. 



T. vertiginosa, Mgn. 

 . Frontal stripe rufous or flavescent, much narrower than the sides of the fron- 



