154 Orthoirliaplia liiachyceia. 



is amphipneustic. The Icngtli is 12 mm. — Tiie piipa is yeilowish 

 brown, it has in front four small tubercles placed in a quadrate, the 

 two upper bearing each a short, sliff hair. The antennal sheaths are 

 directed to each side. The fourth to eight abdominal segments each 

 with a girdle of bristle-shaped spines of unequal lengths at the hind 

 margins, the spines being shortest on the tirst segments; on the doreal 

 side of the second and third abdominal segment tliere is a transverse 

 row of similar bul short spines. (Beling counts here, as he also does 

 in his descriptinn of the pupa of Leptis. nine abdominal segments, 

 he thus evidently considers the third thoracic segment as belonging 

 to the abdomen; according to Ihis interpretation it is in reality the 

 third to seventh abdominal segments that bear girdles of spines, and 

 the first and second that bear rows of small spines.) The last seg- 

 ment has a transverse row of spines above. disconnected in the 

 middle, and two large spines belovv. The length is 10 nnn. The 

 larva was found in the earth in May, it thus hibernates. 



The species seem generally to be rare. 



Of the genus at most (> species are known from the palæarctic 

 region; one has hitherto bcen found in Denmark. 



1. S. crassicornis Panz. 



1807. Atherix. Panz. Fn. Germ. CV. 10. — 1842. Atherix, Zelt. Dipt. 

 Scand. I. 223, 1. — 18(52. Ptiolina, Scliin. F. A. 1, 179. — 1903. Kat. 

 palåarkt. Dipt. 11, 87. 



Male. Front blackish, face grey. Antennæ with the basal joint 

 long and very thick, grey, clothed with long, black hairs: the apical 

 joints brownish. Palpi black, black haired. Thorax greyisli black. 

 indistinctly striped, the disc with longish black hairs, the metapleura 

 with a tuft of long, pale hairs. Abdomen greyish black, clothed with long, 

 brownish hairs. Venter greyish black. Legs black or brownish, the 

 knees narrowly yellow. The coxæ and femora with longish hairs; 

 tibiæ and tarsi short haired, on tlie hind tibiæ a fringe of short hairs. 

 Wings pale brownish fumigated, especially towards the anterior margin, 

 the veins brown; the stigma faint, pale brownish. llalteres brown, 

 the peduncle lighter. 



Female. Front very broad, grey or brownish grey; first joint of 

 the antennæ darker than in the male and less hairy. Palpi greyish 

 brown, yellow haired. Thorax greyish with three more or less distinct. 

 dark longitudinal stripes. Abdomen light brownish grey, clothed with 

 short, golden yellow hairs, but not covered with them. Legs brown. 

 Wings less fumigated than in the male. 



Length G.o — 8 mm. 



