56 Syrphidae. 



This interesting species has hitherto only been known in the 

 female sex, though both Loew and Schiner were inclined to think 

 that the sole specimen each of these authors had was a male in spite 

 of the separated eyes; I think this error is caused by the ovipositor 

 of the female being somewhat protruding on the ventral side, and 

 thus mistaken for male genitalia. Schiner, therefore, ascribes the 

 genus separated eyes in both sexes. Rondani says (1. c.) the same, 

 and states that he has seen type-specimens of both sexes which may 

 be an error, as Loew had, at all events originally, only one specimen; 

 he also says that he has himself taken both sexes, which is certainly 

 likewise erroneous. 



T. primus is rare in Denmark, only five specimens have been 

 caught in 1906 and 1909; Copenhagen in a garden, Amager, Ordrup 

 Mose (the author); the dates are ^^/s — "'k. 



Geographical distribution: — The species is but little known; it 

 has, besides in Denmark, been taken in Austria and Italy. 



3. Pipizella Rond. 



Species of rather small size and of black, generally a little æneous 

 colour, in one single case with abdominal spots in the female. Head 

 about semiglobular, a httle broader than high, and a little broader 

 than thorax, hollowed behind. Eyes touching in the male for a shorter 

 or longer distance, broadly separated in the female. Frons in the 

 male arched and in none of the sexes conically protruding. In the 

 female the frons with a slight transverse depression, or this wanting, 

 and with very slight, almost no side dust spots, only in Heringi these 

 larger; on the sides at the eye-margin, about in the middle, just at 

 the dust spots or where these should be there is a short row of hairs, 

 a little longer than the other side hairs, and directed a little inwards 

 towards the middle. Eyes densely hairy, generally longest in the male; 

 the facets of equal size. Antennæ inserted near to each other, in or 

 slightly above the middle; they are shorter or longer, generally a 

 little longer in the female; the third joint more or less elongated, of 

 linear or a little oval shape; arista inserted at the base of the third 

 joint, thickened in the basal part, with very short basal joints, only 

 seen under the microscope. The two first antennal joints a little 

 haired, the third and the arista microscopically hairy. Epistoma a 

 little arched, straight, without any central knob, at the mouth edge 

 slightly or almost not reflexed; it is black, and is longish-haired. 

 Jowls almost not descending below the eyes, in front of them a deep 

 pit. The oral cone rather short. Glypeus horse-shoe-shaped ; pro- 



