374 Oi'thorrhapha brachycera. 



discai veins are parallel, the latter is straight and has a small con- 

 vexity lying just outside the posterior cross-vein ; this latter is placed in 

 the niiddle, somewhat oblique; anal vein short and weak. Axillary 

 lobe small. Squamulæ with a small angulary lobe, bearing a long 

 fringe, and with the inner part with longish hairs. 



The developmental stages are not known. 



The species of Teuchophorus occm- at the horders of water in low 

 herbage and on the water piants, and also on the wet earth, 



Of the genus 10 species are known from the palæarctic region; 

 3 have been found in Denmark. 



Table of Species. 



1. Hind tibiæ in the male bent before the tip, the apical 

 part more or less thickened, hairy or with a spine, and 

 with a curved subapical spine on the ventral side. Squa- 

 mular fringe dark 2. 



— Hind tibiæ in the male not bent before the tip, not 

 thickened, and without any curved subapical spine. Squa- 



mular fringe yellow 3. signatus. 



2. Hind tibiæ in the male with no long straight spine at 

 the beginning of the thickening; vertex and frons blue, 

 shining; hind metatarsus in the female a little shorter 



than the second joint 1 . spinig er ellus. 



— Hind tibiæ in the male with a long, straight spine at 

 the beginning of the thickening; vertex and frons green, 

 a little pruinose; hind metatarsus in the female of the 



length of the second joint 2. uionacanthus. 



Of signatus the female is not known; should it be found, it will, 

 I think, be known by the yellow squamular fringe. 



1. T. spinigerellus Zett. 



1843. Zett. Dipt. Scand. II, 604, 90, et 1849. VIII, 3096, 90 {DoU- 

 chopus). — 1862. Schin. F. A. 1, 236. — 1903. Kat. palåarkt. Dipt. II, 347. 



— Y Porphyrops fiavicoxa Meig. 1824. Syst. Beschr. IV, 57,27. 



Male. Vertex and frons blue, shining. Epistoma narrow down- 

 wards, white. Palpi brownish. Occiput greenish, greyish pruinose; 

 postocular bristles black above, pale below. Antennæ black or brownish 

 black. Thorax green, a little brownish pruinose. Pleura greenish, 

 greyish pruinose; propleura with a few pale hairs. Abdomen green 

 or æneous green, clothed with short, black or brownish hairs, and 

 with hindmarginal bristles, longest on the first segment. Venter grey, 

 with pale hairs. Legs yellow, hind femora a little darkened at the 

 apex, and hind tibiæ more or less darkened on the apical part; tarsi 



