Aphiochaeta. 279 



shining, with blackish brown pubescence. Mesopleura bristly, with 

 one conspicuous longer bristle. Abdomen black, dull, the very short 

 hairs almost only visible at the hind margins of the segments and a 

 little more distinct at the sides and hind margin of the sixth segment. 

 Hypopygium somewhat large, greyish black, at the lower anterior 

 corners there is a series of hairs, directed downwards; a complicated, 

 black subanal body with a hook-shaped, at the end furcated process 

 J is generally exposed, and a small, narrow, yellowish ventral plate 

 I is sometimes seen; anal tube of medium size, black, paler at apex. 

 Legs black or brownish black, the front legs, especially tibiæ and 

 tarsi, paler; hind femora broad, below the basal half with longish 

 hairs; hind tibial bristles distinct, but somewhat small. Wings nearly 

 clear, yet slightly yellowish, veins brown, the thick veins blackish 

 brown; costa 0,40 of the wing-length, costal divisions about as 3 — 1 — 1 ; 

 costal cilia long, but moderately; fourth vein evenly and slightly 

 curved in its whole lengtli. Halteres black. 



Female. Similar to the male, only the antennæ smaller and the 

 hairs below hind femora shorter. 



Length. About 1 to nearly 1,5 mm. 



Wood says that the lower supraantennals are quite small, but 

 this is not correct, they are only somewhat smaller than the upper, 

 but they are often difficult to see. 



A. pectoralis is rather common in Denmark; Ørholm, Holte, Geel 

 Skov, on Langeland at Lohals and in Jutland at Jelling, Ry and in 

 Egense Skov at the east end of Limfjorden (the author) and at Agger 

 on the w^est coast (Th. Mortensen); the dates are Ve— ^Vio in 1918 

 to 1921. I generally took it with the net in low herbage and especially 

 in grass in woods; the female has appeared much rarer to me than 

 the male. 



Geographical distribution: — Besides in Denmark occurring in 

 England and there common, and, according to a specimen sent from 

 Pater Schmitz, in Holland, but it is no doubt more widely distributed. 



Group IV. 



Scutellum with two bristles. 



Mesopleura bristly with the bristles uniform, all small. 



Costa long. 



39. A. lucifrons Schmitz. 



1918. Schmitz, Entom. Ber. Nederl. Ent. Ver. V, 58. - 1919. Schmitz, 

 Jaarb. Natuurh. Genootsch. Limburg 1918, 157. 



