10 ARKIV FÖR ZOOLOGI. BAND 11. NIO 26. 



front. Front margin of prothorax semicircular. A transverse 

 furrow one third from the front margin; the furrow hardly 

 reaches the lateral margins. Meso- and metathorax blackish, 

 dorsally and ventrally, and with reddish brown streaks and 

 spöts. Abdomen brownish yellow with blackish lateral mar- 

 gins and with some irregular dark spöts above. Legs yellow- 

 ish brown to reddish brown; the hind pair paler than the 

 others. Femora blackish; the for^ and the intermediate ones 

 with a reddish brown streak above and below. Tibiae with 

 a blackish band at the tip. Legs, especially the före ones, 

 with whitish hairs, mingled with some blackish ones. Mem- 

 brane of wings h3^aline; nervature brownish to blackish with 

 whitish interruptions. The wings, especially the forewings, 

 with long sooty brown streaks. 



Length of forewing 16 mm; that of hindwing 14 mm. 



One specimen from Kimberley district, N. W. Australia, 

 May. 



Acanthoplectron n. g. 



Wings long and slender, gradually broadened towards 

 apex, which is rather obtuse. Costal area in the forewing 

 narrow and of the same breadth from base to the ptero- 

 stigma; some few crossveins before pterostigma forked. Apical 

 area with a few crossveins, arranged in one row. Bs arises 

 at the level of the fork of Cui. Three crossveins in the radial 

 area before the origin of Bs. No Banksian lines. The angle 

 between Cu^ and Cwip very acute. Cu^ straight. 2 A and 3 A 

 separate and only connected by a very short crossvein; they 

 are running close to each other from base to the connection 

 by the crossvein. 2 A unforked; 3 A forked. The costal area 

 in the hindwing of the same shape as in the forewing. Some 

 few crossveins in the apical area. Two crossveins before 

 origin of Es. lA and 2 A present; one crossvein between 

 them. Legs short and stout; femora and tibiae of the same 

 length; tarsi of före legs as long as tibiae, of hind legs a little 

 shorter. Spurs stout, almost bent in a right angle and with 

 a pointed dent internally. Spurs as long as three or four 

 tarsal joints united. The fifth joint about as long as the 

 four others united. Abdomen as long as the forewing. 



Genotype is the below described species. 



