issi. 28 



to tli<? coiiiuion .1/. ve.ipertiiia, bill (lifl'i'i's Kv luiviii:; llic ;ih(loinrn narrower anil moro 

 flongated ; tlif IiaUcres black, not jollow ; tin- winj^s clear, not blackened; llio 

 posterior tibiiL' I'iliati'd aloin^ both sides, not l)are ; and I'ui'nished with a single 

 stroni; spine al, (lie end, on tlie iiuier si(b'. 



]\l. .VJJ.OTAJ>LA, Mcig. 

 'J'liis is rather aii aberi'ant species, the generic position of which is somcwliat 

 doubtful ; by the siiape of the abdomen it resenddes a Ilijdrophoria, but the anal 

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



M. UREAXA, Mei'i;-. 

 In one variety of this common species the niah's liave tlie anterior fenun-a pale 

 like the femali^s, without any black eoh)ur. even at their bases. 



]\r. AXOELicj':, Scop. 



It is almost inipossil)le lo distinguish this s^iecies from M. ttrhana, which it 

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

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

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

 from J/, urhana by the external transverse vein of the wings being more upright 

 than in that si)ecies ; this charactei', however, is quite insutlicient, and it remained 

 for Eondani to point out a (rue characteristic difference. He noticed that in 21. 

 angelica' tlie penultimate t>r 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 J7. urlana the middle or disc of tlie .same segm?nt is without 

 distinct bristles. Besides this character, the arista has niucli shorter hairs in .1/. 

 angelica; than in M. urlana ; the external transverse vein is much less oblicpie ; the 

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

 yellow as in M. urhana. Eondani says that the size of the former is rather less than 

 that of the latter species. 



This fly is decidedly i-are in England. I have only seen one female, which 1 

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



Among sonic unarranged British Biptera collected many years ao;o, I find a 

 single male of an apparently new species of Mt/dcea, related in some points to J/. 

 angeliccE and M. nrhana. It is more elongated in shape and rather larger than eitlicr 

 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 peeuliarlv long 

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

 of the antcnufe being absent, as \vell as both the anterior legs. 



M. SEPAEATA, Meig. 

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

 joints of the antenme 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. FLAVEOLA, Pall. 

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

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

 but the males are seldom met with. 



(To he ronfi'iiur'dj. 



