Stiatiomyiidae. 69 



on several localities; vicinity of Copenhagen, Lersø, at Snekkersten 

 and at Faxe: Lolland at Maribo; Funen at Faaborg and in Jutland 

 at Søholt near Ebeltoft. I once have taken a specimen in a garden. 

 .My dates are -'/u — ^''/t. 



Geographical distribution : — Northern and middle Europe down 

 into Francc, towards north to the middle of Sweden but liere rare. 



10. Beris Latr. 



Species of rather small size, thorax black or metallic. abdomen 

 black, brownish or yellowish red. Head semiglobular, somewliat 

 tlattened behind, broader tlian high, as broad as or very slightly 

 broader than the thorax. Antennæ inserted nearly in the middle 

 of the front side of the head. Face and epistoma broad, retreating, 

 yowis not descending below the eyes, horizontal, but the mouth 

 edge is, on the other hånd, somewhat ringlike produced all round. 

 Antennæ somewhat elongated, ten-jointed, the two basal joints of 

 equal length, the rest forming an annulated, fusiform part, the first 

 and last joints of which are the longest. Eyes hairy, unicolorous. 

 touching in the male, widely separated in the female; in the male the 

 upper facets are slightly larger than the lower, or the facets are 

 almost equal. The oral cone is very short; clypeus small; proboscls 

 also very short with a small labrum and hypopharynx; there are no 

 maxillæ but small one-jointed maxillary palpi; the labella are not 

 very broad, they protrude a little forwards and may be spread so as 

 to form together a plate. Thorax a little longer than broad, scutellum 

 with six bristle-bearing spines'). Abdomen somewhat elongated, as 

 broad as or slightly broader than thorax, consisting of seven segments 

 of which the last is, in the male, small and often hidden. The male 

 genitalia show a median apparatus with two styles and a pair of 

 hookformed lateral lamellæ with thick bases; the female genitalia have 

 a pair of small styles. Legs with the hind metatarsi thickened. Wings 

 with the radial vein distinct and the cubital vein forked: from the 

 discai cell rise three veins of which the third is the anterior branch 

 of the postical vein, this branch closes the discai cell beneath; there 

 is thus no postical cross-vein; there are four posterior cells, the third 

 and fourth being fused. In rest the wings lie parallel over the abdomen. 



The larvæ of the genus are, as far as I am aware, not known; 

 Walker (Dipt. Brit. I, 12) states that the pupa of B. dutlybeata „has 

 been found in moos*. Handlirsch (Verh. zool. hot. Gesellsch. Wien, 



M Individual aberrations with from four to eighl spines are sometimes to be found. 



