Aphiochaeta. 261 



ish, veins brownish; costa reaching to or about to the middle, 1 aboiit 

 double 2 and about equal to or longer than 2 + 3, but somewhat 

 varying, 2 considerably longer than 3; costal cilia moderately short 

 to almost midway between short and long; angle at fork somewhat 

 large; fourth vein evenly curved in the whole length, a little recurved 

 just at apex, it is obliterated just at the base. Halteres black. 



Female. Similar; antennæ small; hind femora likewise with long 

 hairs below the basal half. 



Length 1,4 — 1,8 mm. 



I have compared my specimens with typical specimens from 

 Wood, kindly sent me from Mr. Collin. 



A. riidis is rare in Denmark; Holte (Th. Mortensen), and in 

 Jutland at Skamling south of Kolding, Jelhng, Ry and Egense Skov 

 at the east end of Limfjorden (the author); the dates are V? — ^V? in 

 1917 to 1921. 



Geographical distribution: — Besides from Denmark the species 

 is at present with certainty only recorded from England, but, according 

 to a communication from Pater Schmitz, it seems to be distributed 

 also in middle Europe. 



24. A. depilata Lundbk. 



192L Lundbk. Vidensk. Medd. fra Dansk naturh. Foren. 72, 132, 2. 



Male. Frons low, twice as broad as high at the sides, greyish 

 black, dull ; bristles as in rudis^ the bristles of the lower row likewise 

 near to each other, but the outer placed lower, in nearly the same 

 height as the inner, and this latter thus less near the margin; upper 

 supraantennals still more distant. Antennæ blackish, large, third 

 joint oval, reaching above the centre of the eye, arista short-pubescent. 

 Palpi yellow, somew4iat small as in rudis, the bristles scarcely so long. 

 Thorax black, a little shining, with brownish pubescence. Mesopleura 

 bristly, with one long bristle, but not so long as in rudis. Abdomen 

 dull black and haired as in rudis. Hypopygium likewise large, knob- 

 shaped; it is black and has hairs below- whicli seem to be placed more 

 densely and bunch-like than in rudis., one of them is a little longer 

 and curved inwards; anal tube yellow% of medium size; when the 

 subanal body is exposed, a very large, black polished, hook-like piece 

 is seen, tapering into a long, band-shaped, pointed end, it has also 

 at the base another, broader piece. Legs yellowish, the posterior 

 slightly darker, the apical half of hind femora brownish; front tarsi 



