The Scottish Naturalist. 197 



The oblong brown cocoons are spun in the earth, or, in con- 

 finement, between the leaves. Two broods occur — the first in 

 June or July ; the second in August, September, and the early 

 part of October. The larva was first described by M. Snellen 

 van Vollenhoven in 1843. 



The pupa is bright green, with legs, antennae, and wings, 

 white ; the eyes black. 



Imago. Antennae as long as the body, black above, pale 

 brown underneath ; the second joint entirely black. Head pale 

 green, the crown testaceous ; mandibles black, palpi fuscous ; 

 ocelli situated in a black spot; a small dot behind them, black. 

 Thorax above testaceous ; a black stripe in the centre, touch- 

 ing the head ; meso-thorax with a broad black stripe on each 

 side ; close to these on the inner side is frequently a small black 

 mark ; behind, and nearer the edge, are two somewhat triangular 

 spots, also black ; the white cenchri surrounded by black. Un- 

 derneath it is pale green, the meso-thorax somewhat testaceous. 

 Abdomen light green, the first three or four segments — some- 

 times all the segments — marked with transverse black lines in 

 the centre ; also some dots at the base. Feet light green ; the 

 hinder tibiae with a reddish tinge ; the knees often black ; all 

 the tarsi fuscous ; the coxae somewhat whitish. Wings hyaline, 

 iridescent ; costa and stigma green ; nervures black. Length, 

 3-4 lines • exp. alar 8^-9 lines. When the insect is living the 

 colour is a beautiful green ; with age this assumes a testaceous 

 hue, and finally becomes straw coloured. The thoracic marks 

 also fade. 



The male is much smaller and thinner ; the ocelli situated in 

 a large square black mark ; the back of the head black. The 

 antennae are a little longer than the body. Thorax entirely 

 black above ; pronotum light green. Abdomen black above ; 

 with the segments edged with testaceous ; the sides also tes- 

 taceous. 



Nematus vircscens is a common species in Scotland, occurring 

 from Sutherlandshire to the border. 



No. V.-ATHALIA ROS^]. 



Tenthredo ros^:, Linne'. Fauna Succica, Ed. ii. 1555. (1761); 

 Klug, Blattiv. 87, 2 j Hartig., Blatt-u.-Holzw. 284, 2. 



Phyllotoma RoSiE, Falle'n, Monogr. Tenthr. L. 28, 2. 

 Athalia ros;e, Dahlbom, Prod. Hymen. Scand. 64, 10, pi. 1, 



