206 Orthorrhapha brachycera. 



two veins to Lhe margin, the lower is the upper branch of the postical 

 vein. which closes the discål cell below; sometimes there is a small 

 veinlet indicating a beginning of an upper branch of the dlscal vein, 

 and further the wing-membrane has always a fold here; the lower 

 branch of the postical vein is somewhat recurrent; the anal vein does 

 not reach the margin. The discai cell is of moderate length;* the 

 basal cells rather large, the anal cell a little shorter than the second 

 basal cell. Stigma absent, but the apical part of the costal cell may 

 be more or less coloured. The axillary lobe well developed. Alula 

 not developed, the margin here fringed. Alar squamula small, with a 

 long fringe. — In sphenoptera the discai cell is very long, and the 

 axillary lobe almost not developed. 



So far as I am aware the developmental stages of Leptopeza are 

 not known. 



The species of this genus occur in woods, in low herbage and 

 on bushes on open, but humid and somewhat shaded piaces. 



Of the genus 6 species are known from the palæarctic region; 

 two have hitherto been found in Denmark. 



Table of Species. 



1 . Thorax black in the male, yellow in the female ; wings 

 with tlie axillary lobe well developed, and the discai cell 

 moderately long 1. flavipes. 



— Thorax black in both sexes, the prothoracic parts silvery; 

 wings narrow, with the axillary lobe almost not developed, 

 and the discai cell very long 2. sphenoptera. 



1. L. flavipes Meig. 



1820. Meig. Syst. Beschr. II, 353, 4, J* {Ocydromia). — 1842. Stæg. 

 Krøyer's Tidsskr. IV, 99. — 1842. Zett. Dipt. Scand. I, 242, 2, et 1849. 

 VIII, 2997, 2, et 1859. XIII, 4979, 2, <^. - 1862. Schin. F. A. I. 82. — 

 1903. Kat. palåarkt. Dipt. II, 261. — Ocydromia ruficoUis: 1820. Meig. 

 Syst. Beschr. II, 353, 3, Tab. XXI, Fig. 24, 9. — 1842. Zett. Dipt. Scand. 

 I, 241, 1, et 1849. VIII, 2996, 1, et 1859. XIII, 4979, 1, ?. 



Male. The very narrow epistoma blackish; palpi yellow. Occiput 

 blackish, at the top with long, black hairs, for the rest yellow-haired. 

 Antennæ black or brownish black. Thorax black, shining; the disc 

 is clothed with short, whitish hairs, which are so arranged, that 

 there is a uniserial dorsocentral row on each side, while the acro- 

 stichal hairs are pluriserial and occupy the whole middle space; the 

 dorsocentral hairs are the longest, and they become long and bristly 

 behind; in front both the acrostichal and dorsocentral hairs change 

 into a dense pruinosity. There are some small humeral hairs, one 

 long and some shorter notopleural bristles, a supraalar and a postalar 



