42 THE FAUNA OF SCOTLAND. 



of Thomson) are only varieties of N. miliaris. The subject, however, requires 

 further elucidation before a definite opinion can be given. The extreme 

 variability of the larvae of miliaris is curious. The two varieties I have 

 described appear to be mainly autumnal forms, although possibly they may 

 also occur in the summer. 



49. N. XANTHOGASTER, Foevster. 



= piliserra, Thorns. 



Eare. Imago on 7th July. Larva in the autumn. Food plants — 

 ISalix cinerea, aurita, viminalis. 

 Possil Marsh (one specimen). 

 The larva rolls down the edges of the willow leaves. 



50. N. SHARPi, Cam.* 



Rare. Imago in June. Larva unknown; 



Taken in Scotland by Dr Sharp. Exact locality unknown. 



51. N. CRAssuLUS, Dhm., Thorns. 



Common, Imago in June. Larva July to September. Food plants — 

 Salix vitellina, etc. 



Possil, Cadder, Milngavie, Kintail, Strath-Glass. 



Braemar, Aberdeen, Sutherlandshire, Eannoch. 



Like the last, this species is a leaf-roller in the larval state (see Proc. 

 Nat. Hist. Soc. Glas. ii., 313). 



52. N. STRONGYLOGASTER, SJp. 11. 



Antennae longer than the body, black, bare, tapering towards the apex, 

 the 3d joint longer than the 4th. Head narrower than the mesothorax, 

 black, the eyes surrounded with a pale brown band; clypeus and labrum 

 white; the tips of the mandibles piceous; vertex shining, coarsely 

 punctured; the frontal area distinct; front broad; antenna! fovea large, 

 deep; antennae widely separated; clypeus deeply and broadly emarginated; 

 palpi long, fuscous. Thorax black, shining; mesonotum wdth a few fine 

 punctures; pronotum broadly edged with white; pleurae half-shining, 

 punctured; the tegulae white. Wings ample, longer than the body, 

 iridescent, hyaline, with a fuscous tinge ; the costa and stigma 

 testaceous; the 1st submarginal nervure is somewhat faint in the middle; 

 the 2d recurrent nervure is received about the length of the 2d sub- 

 marginal nervure in front of the same; the 3d submarginal cellule is 

 longer than broad, widened at the apex. Legs long, testaceous; the coxae, 

 trochanters, and base of femora white; apex of posterior tibiae and all the 

 tarsi fuscous-black. The hinder tarsi are longer than the tibiae, which are 

 deeply grooved. Abdomen not much longer than the head and thorax, 



* E. M. M. xu. 191. 



