Syrphus. 301 



in the niiddle and sloping at the sides; sometimes it is almost, or 

 actually, narrowly interrupted in the middle; the second band is 

 similar but a iittle nearer the front margin ; the bands go near to but 

 do not quite reach the margin vvith their upper eorners; fourth and 

 fifth segments have narrow, yeliow hind margins, the latter also yei- 

 low spots at the basal eorners. The hairs follow the ground colour 

 but are mainly black at apex; at the sides they are long and yeliow 

 at the base, for the rest short and black. Venter yeliow with black, 

 transverse spots on the middle of the segments; it has long, pale, on 

 the apical half mainly black hairs. Genitalia of medium size, eighth 

 segment black except just at base, with black hairs. Legs yeliow, 

 anterior femora with the base black, hind femora more black gener- 

 ally to near the apex, tarsi with the middle joints more or less 

 brownish, hind tarsi often upon the whole darker. The long hairs on 

 femora black and yeliow or almost all black, the short hairs black 

 on hind femora and tibiæ and also partly on middle femora, for the 

 rest yeliow. Wings hyaline or slightly tinged. Squamulæ pale yeliow 

 with a darker fringe. Balteres yeliow. 



Female. Vertex of medium breadth, bluish, shining; frons with 

 two small side dust spots which cause a short, black furca to proceed 

 from the vertex, the lower third is yeliow, as in the male generally 

 with two spots or a black lunule above the antennæ; the hairs all 

 black. Abdominal markings somewhat narrower than in the male, 

 the bands going over the margin just at their upper eorners. Legs 

 paler as the femora are quite yeliow or only a Iittle black at the base. 



Length 8,5 — 10,5 mm. 



The larva is as usual transversely corrugated ; it is not chagreened 

 but very densely clothed with short, fine spines, and it has the usual 

 soft bristles placed transversely on the corrugations and at the sides 

 on small warts; the arrangement is as in the other larvæ; the bristles 

 are relatively long. The posterior spiracular process is quite short, a 

 liltle cleft just at the end. The ventral proleg-like warts rather distinct. 

 The colour is reddish grey with some blackish markings and a nar- 

 row, black middle line. The length is 13 mm. The pupa is of the 

 common shape, not much attenuated behind; it is likewise finely 

 spinulose, but the longer bristles are rather indistinct; the colour is 

 similar to thai of the larva. The length is about 7 mm. 



This species has sometimes been compared with nitidicoHis, and 

 Strobl and Thaihammer even consider it as a variety of this species. 

 I am quite of the same opinion as Verrall, when he says that he finds 

 the two species very different, and does not understand that they 

 can be considered as the same species, and like hini I should think 



