480 Syrphidae. 



with an apical spur of the described shape on the hind tibiæ of the 

 male, and upon the whole with the hind tibiæ of such a shape. 



M. equestris is rare i Denmark; Copenhagen in gardens, Ordrup 

 Mose, Ørholm (the author). Fuglevad, Søllerød (Klocker); on Funen at 

 Odense, and in Jutland at Munkebjerg at Vejle Fjord (N. P. Jørgensen) 

 and at Silkeborg (Esben Petersen). The dates are ^^U — '^h. Further 

 I possess a specimen bred from a flower-pot by Mr. E. Suenson, the 

 imago came on ^^/d. As the species besides in gardens also has been 

 taken on other localities it now seems to live in Denmark, but it is 

 of course introduced, and it has never appeared in any number nor 

 done any damage. The species evidently spreads towards the north, 

 thus Dr. AmmitzboU has kindly communicated to me that in 1915 

 the species was in May to July one of the most common Syrphids in 

 the vicinity of Ystad in southern Scania, while there were earlier taken 

 only three specimens in 1910. 



Geographical distribution : — The species is distributed over all 

 middle and southern Europc, and in North Africa; it was not known 

 from Sweden before 1910 (Ringdahl, Entora. Tidskr. 32, 1911, 124), 

 but it now seems common in southern Sweden (see above). 



IV. Milesiinae. 



34. Tropidia Meig. 



Species of medium size and a somewhat narrow shape, with 

 reddish markings on abdomen; they are slightly haired. Head semi- 

 globular, not short, as broad as thorax and a little broader than high; 

 it is slightly excavated behind. Eyes touching in the male, separated, 

 but not broadly, in the female; they are bare; the facets in the male 

 somewhat considerably enlarged on the upper front part. Antennæ 

 inserted in the middle of the head; they are short, third joint nearly 

 square; the basal joints have small hairs, the third and the arista 

 microscopically hairy. Epistoma keel-shaped, without central knob, 

 straight from the antennæ to the mouth edge and not descending; 

 it is black and yellow but pale pruinose, with a black, bare middle 

 stripe. Frons and epistoma without hairs. Jowls not descending; 

 they are separated from epistoma by a furrow which stretches up to 

 the middle of epistoma separating ofif narrow, short-haired eye-margins. 

 Oral cone and proboscis of some length; clypeus of usual shape. 

 Labrum long, of the usual construction, the median process the longest, 

 cleft and with emergences at the apex; the upper lateral process 

 delicate, the lower drawn a little out at the apex; hypopharynx a 



