234 Tachinidae. 



dark stripes; three præsutural acrostichals which are not paired but 

 forming one row. Abdomen greyish or yellowish grey pruinose, hind 

 margins very narrowly whitish; the segments each with three black 

 spots at hind margin, the lateral small; fifth segment sometimes 

 black on apical part; besides each segment has a black lateral spot, 

 not seen from above. Abdomen is black-haired, with marginal bristles, 

 none on second, a pair on third and fourth segment. Genitaha black. 



Fig. 68. Wing of H. heteroneura. 



shining. Legs black, with knees more or less reddish, sometimes also 

 tibiæ reddish. Wings a little tinged ; veins blackish. Squamulæ whitish. 

 Halteres yellow. 



Female. I do not know the female; it is recorded to have the 

 legs paler. 



Length 3,5 mm. 



H. heteroneura is rare in Denmark, I know only two specimens, 

 both males, Dyrehaven (the author) and Tisvilde (Kryger); the 

 dates are from June. 



Geographical distribution: — Europe; towards the north to 

 Southern Sweden, and in Finland. 



37. Ptydioneura B. B. 



Species of small size, whitish to yellowish pruinose, with black 

 bands or spots on abdomen. Head broader than thorax, flat behind, 

 higher than long. Frons as broad as or broader than the eye, about 

 equal in both sexes or broader in female, a little or more strongly 

 protruding. Jowls narrow. In both sexes ocellar, inner and smaller 

 outer vertical and two orbital bristles. Behind postocular bristles 

 black hairs. Frontal bristles reaching to lunula, the uppermost 

 reclinate in both sexes. Gheeks fmely hairy above, or longer down- 

 wards, but for the rest bare. Vibrissæ ascending to near upper end. 



