Pipiza. 



75 



pubescence; in both sexes the anterior legs are paler, and the fringe 

 on hind tibiæ longer, though this latter difference is not large; finally 

 the upper marginal cross-vein is less angularly bent. 



C. vitripemiis seems to be somewhat rare in Denmark, it has only 

 been taken in Ordrup Mose and Dyrehaven, and a single specimen 

 on Lolland at Lohals (Stæger, the author) ; the dates are ^^h — ^Vs. 



Geographical distribution:— The species is recorded down into 

 Italy; it was not known to Zetterstedt, but according to Wahlgren 

 (Entom. Tidskr. XIII, 1909, 17) it occurs to the southern Sweden. 



6. Pipiza Fall. 



Species of medium size, black or slightly æneous, generally with 

 pale abdominal spots. Head about semiglobular, broader than thorax 

 and a little broader than high, hoUowed behind. Eyes touching in 



Heads of P. bimaculata in profile. 

 Fig. 23. Male. Fig. 24. Feniale. 



the male, broadly separated in the female. Frons in the male small, 

 not arched, and in both sexes conically protruding. In the female 

 the frons has distinct, larger or smaller side dust spots (only wanting 

 or almost so in quadrimaculata), and on these spots there are at the 

 eye-margin longish, inwards directed hairs: the frons has a more or 

 less pronounced, broad and shallow, sometimes indistinct transverse 

 depression, bordered above by an angular line with the top forwards. 

 Eyes densely hairy, the facets of equal size. Antennæ inserted on the 

 prominent frons, in or a little below the middle of the head; they 

 are short, the third joint somewhat quadratic or rectangular, not 

 elongate or very slightly so, generally largest in the female; arista 

 inserted somewhat near the base of the third joint, it is thickened in 



