Addenda et Corrigenda. 445 



the basal part; there are some hairs on the sides beiow, among which 

 one conspicuous and bristly; the lower hinder corners sharp, finely 

 hairy; ventral plate narrow, black; anal tube long, rather high out- 

 wards, black, it is curved downwards and has no apical hairs. Legs 

 brown, front legs not, or almost not paler, hind femora blackish; 

 front tarsi with the foiir last joints a little dilated outwards, the 

 fifth the most; the last or two last joints blackish; hind femora with 

 the hairs below the basal half somewhat strong, but not long, they are 

 densest and longest at the base, being shorter outwards; bristles on 

 hind tibiæ of some lengtli, but not strong, on the basal part fme. 

 Wings a little tinged, veins brownish; costa not reaching to the middle, 

 0,46 of the wing-length, costal divisions about as 13 — 8 — 4 (which 

 is about the same as Schmitz gives viz 14 — 9 — 4); costal cilia long; 

 fork not long, the angle not large; fourth vein a little curved in its 

 first part, for the rest very slightly curved, almost straight, Halteres 

 yellow. 



Female. Unknown. 



Length 1,6 to fully 2 mm. 



This species belongs to the group with sordida and its allies, 

 but is sufficiently distinct. 



A. prodiicta is rare in Denmark, only two males have been taken, 

 at Esbjerg V? and on Fanø ^"Z? 1921 (Th. Mortensen). 



Geographical distribution: — Besides known from Pomerania. 



Page 350 after A. mixta add : 



98 a. A. Collini Wood. 



1909. Wood, Ent. Month. Mag. 2, XX, 28, 36 {Phora). — 1914. Briies, 

 Bull. Wisc. Nat. Hist. Soc. XII, 115. — 1919. Schmitz, Jaaib. Natuurh. Ge- 

 nootsch. Limburg 1918, 162. 



Male. Frons broader than high, greyish black, dull; inner bristle 

 of lower row a little below the outer and about in the middle between 

 it and the upper supraantennal; supraantennal bristles unequal, the 

 low^er quite small or minute; upper supraantennals nearer together 

 than the inner bristles of middle row and the lower a little more ap- 

 proximate. Antennæ brown to black, of ordinary size, arista distinctly 

 pubescent. Palpi yellow, of ordinary size, bristles well developed. 

 Thorax black, generally with the humeri and postalar calli, and often 

 also the sides reddish, rarely thorax wholly reddish; it is a little shining, 

 with brown pubescence. Pleura more or less reddish. Mesopleura bare. 



