224 Orthorrhqpha brachycera. 



bristles in each row, and between them there are shorter bristles; 

 small acrostichal bristles present. Further generally two humeral 

 bristles, a posthumeral, two notopleural and a postalar bristle, but 

 no supraalar bristle; the bristles are black; besides there are small 

 hairs behind the humeri and in the præsutural depression. Scutellum 

 with two black marginal bristles and numerous small hairs. Pleura 

 light bluish grey, metapleura with fine, whitish hairs. Abdomen olive- 

 brown above, bluish grey at the sides ; it has short, dark, at the sides 

 pale hairs. Venter light bluish grey, with whitish hairs. Exterior 

 genitaha large, the outer (lower) lamellæ grey, the inner (upper) large, 

 thin and compressed, blade-shaped, of light brown colour; the lower 

 lamellæ have somewhat long, yellow hairs. Legs blackish or dark 

 brownish; coxæ light grey pruinose, and also the femora more or 

 less pruinose; the legs are more or less short-haired with brownish 

 to blackish hairs, hind tibiæ with some single bristly hairs below. 



Fig. 9.3. Wing of Cl. bisticfma. 



Wings hyaline, slightly greyish. Veins black or brown. The stigma 

 forming a large, roundish, blackish or brown spot, and the radial 

 vein forming a distinct curve below it; it is placed considerably before 

 the base of the cubital fork; sometimes it is continued a little beyond 

 the radial vein. Balteres blackish brown. 



Female. Agreeing with the male; the eighth ventral segment 

 somewhat long, conical. 



Length 4 — 4,2 mm. 



CL histigma is rare in Denmark, and has only been taken in 

 earlier time, and hitherto only in Jutland at Store Aa and at Hobro 

 (Jacobsen). 



Geographical distribution : — Northern and middle Europe down 

 into Austria; towards the north to northern Scandinavia, and in 

 Finland. 



6. Cl. rhynchops Now, 



1868. Now. Verh. Nat. Ver. Briinn, VI, 89, Tab. II, Fig. 6. — 1869. 

 Loew, Beschr. europ. Dipt. I, 268,159. — 1881, Mik, Verh. zool. bot. Gesell. 

 Wien, XXXI, 327, Tab. XVI, Fig. 15. — 1903. Kat. palåarkt. Dipt. II. 267. 



