Nemorilla. 327 



numerous. Orbits with fine, jowls with stronger black hairs. Occiput 

 black, downwards grey along the eye-margin, with yellowish hairs. 

 Eyes pale-hairy. Antennæ black, second and third joint of about 

 equal length, or third slightly longer; arista thickened in about basal 

 half, second joint short. Palpi black. Thorax black, somewhat shining, 

 greyish pruinose, with three broad black stripes, the median much 

 broader than the lateral, so that thorax appears black with two stripes 

 and the sides greyish; scutellum black, greyish pruinose, Thorax 

 black-haired. Two sternopleural bristles (rarely three). Abdomen 

 black, with or without small red side markings; the three last seg- 

 ments grey or yellowish grey pruinose, with black spots in such a 

 way that abdomen is pruinose with second segment black, third 

 with a median and to each side of it a lateral spot, fourth and fifth 

 with a black middle line; sometimes also lateral spots visible on fourth 

 segment. Abdomen black-haired, second segment with a pair of 

 marginal bristles, third with discai and marginal bristles in various 

 numbers, and fourth with numerous discai and a row of marginal 

 bristles. Legs black. Wings nearly clear, a little dark at base; veins 

 black; discai angle rectangular; apical cross-vein about straight; 

 posterior cross-vein doubly curved. Squamulæ yellowish. Halteres 

 brownish yellow. 



Female. Similar; frons a little broader than the eye; jowls nan- 

 rower than in male; antennæ somewhat reddish. 



Length, Rather varying, 4,5 to about 8 mm. 



N. floralis is not common in Denmark; Ordrup, Charlottenlund 

 (Stæger), Dyrehaven (the author), Tisvilde (Worm Hansen, Kryger), 

 and in Jutland at Lemvig; the dates are ^^e — ^^/lo- ^s hosts are known 

 Euproctis chrysorrhoea^ Mamestra persicariae, Plusia gamma and 

 festucae, Eurrhypara urticata, Sylepta ruralis, Acrobasis consociella, 

 Phlyctaenodes sticticalis, Acalla ferrugana, Tortrix viridana, Notocelia 

 uddmaniana, Carpocapsa pomonella, Hyponomeuta malinella, Tachyp- 

 tilia pomonella and Psecadia bipunctella, further the non Danish 

 Rhodophaea svavella, Cacoesia murinana and Oenophthira pilleriana. 

 Two of our specimens are labelled as bred from Tortrix viburniana 

 and Emydia grammica, formerly not known as hosts for the species; 

 the larva of T. viburniana was taken on ^^ti the fly coming on ^^/g. 



Geographical distribution: — Europe down into Italy; towards 

 the north to northern Scandinavia. It occurs also in North America. 



Remarks: N. maculosa Meig. and notabilis Meig. are now, and 

 no doubt correctly, considered as one species floralis Fall. 



