264 Tachinidae. 



cylindrical or elongated ovate, black and shining, with very narrow 

 pale incisures; it has black hairs and somewhat small, fine and de- 

 cumbent marginal bristles as rows on all segments. Genitalia forming 

 a knob below apex of abdomen; upper forceps apparently forming 

 two hooks, each with a long, backwards directed hair. Legs black or 



Fig. 72. Wing of C. atra. 



blackish, somewhat robust, especially front legs which are also some- 

 what long. Wings and veins brown. Squamulæ yellowish brown. 

 H alteres yellow. 



Female. I have not seen the female, and it was also unknown to 

 Zetterstedt and Sintenis ; according to Stein, it is quite similar to the 

 male, except for the genitalia. 



Length 2,5 — 2,7 mm. 



C. atra is rare in Denmark, I know only two specimens, both 

 males; Sortsø Skov in South Sealand and in Jutland at Hov near 

 Odder (the author); the dates are in July. 



Geographical distribution: — Northern and middle Europe; 

 towards the north to southern Sweden. 



VIII. Dexiinae. 



50. Syntomocera Schin. 



Somewhat large species, black, greyish pruinose. Head not 

 broader than thorax, slightly convex behind and somewhat puffed 

 out below, higlier than long. Frons in male narrow above, in female 

 very broad, somewhat protruding. Jowls broad, more than half as 

 broad as the eye is high, broadest in female. In both sexes ocellar 

 and inner vertical bristles, in female also outer vertical and some 

 orbital bristles. Postocellar and occipital bristles somewhat large. 

 Behind postocular bristles black hairs. Frontal bristles reaching to 

 insertion of antennæ, all crossing in male, in female an outwards 



