28 t Jul y- 



to the common M. vespertina, but differs by having the abdomen narrower and more 

 elongated ; the halteres black, not yellow ; the wings clear, not blackened ; the 

 posterior tibiae ciliated along both sides, not bare ; and furnished with a single 

 strong spine at the end, on the inner side. 



M. ALLOTALLA, Meig. 

 This is rather an aberrant species, the generic position of which is somewhat 

 doubtful j by the shape of the abdomen it resembles a Hydrophoria, but the anal 

 vein is not prolonged to the border of the wing. It seems to be rare, or rather local. 



M. urbana, Meig. 

 In one variety of this common species the males have the anterior femora pale 

 like the females, without any black colour, even at their bases. 



M. ANGELICA, Scop- 



It is almost impossible to distinguish this species from M. urhana, which it 

 closely resembles, by the description of the older authors. Meigen described it as 

 having both scutellum and abdomen ferruginous, and evidently confused it with 

 quite a different species. Fallen, Zetterstedt, and Schiner, chiefly distinguish it 

 from M. urhana by the external transverse vein of the wings being more upright 

 than in that species ; this character, however, is quite insufficient, and it remained 

 for Kondani to point out a true characteristic difference. He noticed that in 31. 

 angelica the penultimate or third abdominal segment was crossed in the middle of 

 the dorsum by a transverse row of strong bristles, in addition to the row on the 

 distal margin ; while in 31. urhana the middle or disc of the same segment is without 

 distinct bristles. Besides this character, the arista has much shorter hairs in 31. 

 angelica than in 31. urhana ; the external transverse vein is much less oblique ; the 

 fore femora in the females are partially blackened at their bases, and not wholly 

 yellow as in 31. urhana. Kondani says that the size of the former is rather less than 

 that of the latter species. 



This fly is decidedly rare in England. I have only seen one female, which I 

 captured in September, 1878, at Clapham-in-Craven, Yorkshire. 



Among some unarranged British Diptera collected many years ago, I find a 

 single male of an apparently new species of 31ydaa, related in some points to M. 

 angelica and 31. urhana. It is more elongated in shape and rather larger than either 

 of those species ; the penultimate abdominal segment is furnished both on the disc 

 and margin with numerous long setae, irregularly arranged ; the longitudinal dorsal 

 abdominal stripe is wider and more maculiform ; and the legs have peculiarly long 

 tarsi. Unfortunately, it is too imperfect for accurate description, the terminal joints 

 of the antennas being absent, as well as both the anterior legs. 



M. sepaeata, Meig. 



This species closely resembles 31. impuncta, but differs in having the basal 

 joints of the antennae and the palpi black, and not pale as in the latter species ; the 

 arista has also rather shorter hairs ; and the eyes in the male are rather wider apart. 

 It is rare. 



M. FLAYEOLA, Fall. 

 This species closely resembles Hyetodesia pallida, but the eyes are bare and not 

 hairy, and the arista has shorter hairs. The females of this species are not uncommon, 

 but the males are seldom met with. 



(To be continued). 



