Agria. 211 



1911. Abhandl. Nat. Gesell. Gorlitz, 27, 35, Tab. III, Fig. 1. — 1921, Baer, 

 Zeitschr. f. angew. Entom. VII, 391. — 1924. Stein, Arch. f. Naturgesch. 

 90, 6, 204, 1, p. p. 



Male. Frons narrow, about one fifth of the breadth of the eye, 

 slightly protruding. Orbits and cheeks greyish silvery, the former 

 dark above; frontal stripe black, widening downwards. Orbits and 

 cheeks with fine hairs; jowls black-haired. Occiput grey, with all 

 black hairs. Antennæ black, third joint scarcely twice as long as 

 second. Palpi black. Thorax grey pruinose, with three black stripes, 

 to each side of the median a narrow black stripe anterior to the 

 suture. Thorax black-haired. Abdomen grey or brownish grey prui- 

 nose, second segment mainly black, the others with a longitudinal 

 median spot and a roundish black spot to each side, the median spots 

 united to a black middle stripe; the spots are rather fixed though 

 somewhat shifting according to view. Abdomen black-haired, with 

 only marginal bristles as rows on fourth and fifth segment. Upper 

 forceps cleft only at apex, straight, lower forceps of the same length, 

 red, the arms curved backwards towards apex. Legs black; middle 

 femora with a short posteroventral, apical comb of short, strong 

 spinules. Wings a little brownish tinged; veins blackish. Squamulæ 

 brownish. Halteres yellowish. 



Female. Similar; frons about as broad as the eye. 



Length 6,5 — 7,5 mm. 



A. affinis does not seem to be common in Denmark, I possess 

 only a small material; Damhusmosen, Tisvilde and on Bornholm; the 

 dates are in July. One of my specimens is bred from Stilpnotia salicis 

 and belongs to the breeding mentioned by Nielsen (Mindeskr. f. 

 Japetus Steenstrup, København 1913, 8); others are bred from 

 Larentia nigrojasciaria., emerging on 1^4, and two specimens are bred 

 from pupæ found in flood refuse. It is otherwise known as parasite 

 on Lymantria monacha, dispar, Dendrolimus pini, Aporia crataegi 

 and also recorded from Empria abdominalis and Pachytylus migra- 

 torius. The records of it from Hyponomeuta species refer more 

 probably to the following species. The species seems to have two 

 yearly generations; the pupæ from July and August may develop 

 same year, but most of them hibernate. — Zetterstedt 1. c. XIII, 6179 

 mentions the larva in a dead Mololontha vulgaris, but Fallen and 

 Zetterstedt have probably had both this and the following species. 



Geographical distribution: — Europe; towards the north to 

 middle Sweden, and in Finland; it occurs also in North America. 



14* 



