160 Orthonhapha brachycera. 



apical part of the discai vein may be differently situated, the trans- 

 verse vein closing the discai cell may be wanting and other differences 

 may be present. 



S. fenestralis is rather common in Denmark; it occurs in houses 

 on Windows ; Copenhagen, Hellerup ; on Lolland in Maribo ; on Funen 

 in Odense and Faaborg and in Jutland in Vejle and Aalborg. My 

 dates are ^^/r, — ^/s. 



Geographical distribution: — Most parts of Europe; towards the 

 north it is known to middle Scandinavia and in southern Finland; it 

 also occurs in North America. 



2. S. niger De Geer. 



1782. De Geer, Ins. VI, 76, 10, Tab. XI, Fig. 5 {Nemotelus). — 1844. 

 Zett. Dipt. Scand. III, 898,3 et 1849. VIII, 3198,3. - 1862. Schin. F. A. 

 I, 159. — 1903. Kat. palåarkt. Dipt. II, 217. 



Male. Black; eyes well separated, the facets of cqual size. An- 

 tennæ blackish. Thorax rugosely punctate, sparingly clothed with 

 very short, brownish hairs. Abdomen with the same white incisures 

 as in fenestralis, clothed with very short, dark brownish hairs. Legs 

 black or brownish black, tarsi yellow; the hind tibiæ considerably 

 thickened. Wings strongly brownish fumigated with brown veins. 

 Balteres blackish or brown. 



Female. Frons very slightly broader than in the male, the inner 

 eye-margins parallel ; the frons has a depression anteriorly and a faint 

 impressed middle line, along the inner eye-margins it has broad, but 

 somewhat shallow impressed margins; along the posterior edge of the 

 eyes there is a moderately broad margin. The abdominal incisures 

 are brown. 



Length about 5 mmv '' 



S. niger is very rare in Denmark, I only know of three speci- 

 mens, taken many years ago in the nighbourhood of Copenhagen 

 (Drewsen). Zetterstedt mentions that it frequents Umbelliferæ such 

 as Aegopodium, and moreover Syringa, Rosa and Carpinus, but is 

 also found on windows. 



Geographical distribution: — Northern and middle Europe down 

 into France; towards the north to middle Scandinavia. 



