Asilidae. 83 



with long whitish hairs; femora black, tibiæ yellowish ferrugineous 

 with black tips; tarsi blackish, the basal half or more of the meta- 

 tai'si and the base of the following joints yellowish. The hairs and 

 bristles of the different categories present as in cyanurus but with 

 the following differences: on the posterior side of the front femora 

 there are some spine-like bristles which are yellow; those on the 

 front side of the middle femora, on the posterior side of the front 

 tibiæ and on the front and posterior sides of the middle tibiæ are 

 yellow; also some on the tarsi may be yellow. Wings hyaline with 

 the apex and the posterior margin greyish fumigated, the border of 

 the fumigation somewhat distinct; veins brown. Halteres yellow. 



Feniale. Ovipositor black, shining, the sixth and seventh segments 

 take part in its formation; the lamellæ are somewhat long. 



Length 12 — 17 mm. 



This species is in the male easily distingiiished from cyanurus by 

 the not bluish last abdominal segments and by the shape of the geni- 

 talia; in both sexes the colour of the spine-like bristles and of the 

 tarsi are good characters. 



N. cothurnatus is very rare in Denmark; only one specimen, a 

 male, has been caught at Skelskør (H. J. Hansen). 



Geographical distribution: — Northern and middle Europe down 

 to France; towards the north to middle Scandinavia and Finland. 



Remarks. There is some reason to believe that a third species 

 of Neoitamus. N. socius Low, should also be found in Denmark as it 

 is found both in Sweden and Germany; it is very nearly related to 

 cyanurus and the male has like this the sixth and seventh abdominal 

 segments bluish, but in this sex it is easily known by the genitalia, 

 the inner branch of the lower forceps not being crescent-shaped and 

 being truncate at the apex. The female is very similar to cyanurus, 

 but among other characters the tarsi are generally paler, the metatarsus 

 being reddish except the apex and the other tarsal joints having a reddish 

 base ; also the tips of the tibiæ are generally black to a somewhat 

 greater extent. 



17. Epitriptus Low. 



Species of medium or somewhat small size and of yellowish grey 

 colour. Face broad, widened downwards ; epistomal cailus not large, 

 occupying little more than half the height of the epistoma. Antennæ 

 inserted somewhat above the middle, the first joint with long hairs 

 below. The facets in the front part of the eyes somewhat enlarged. 

 Dorsocentral bristles scarcely continued to the middle. The abdominal 

 segments with bristles at the hind margin ; venter witli strong, bristly 



G* 



