198 NEMATUS SALICIS-OINEEEJ). 



The small size and white legs will serve to distinguish 

 this little insect from the other gall-makers. 



I bred it from a berry-shaped gall of a greyish-green 

 colour, covered closely with fine white hairs, sent me 

 by Dr. White from the neighbourhood of Dunkeld, 

 where it occurred on the leaves of a sallow, probably 

 Salix aurita. The larva was white, with the head 

 obscure fuscous, the eye-spots black, the mouth brown, 

 and the segments projected considerably. Previous to 

 pupation I noticed that the end of the body was rather 

 sharply pointed ; the colour was dirty white. The 

 larvae were sent at the end of September, and continued 

 feeding to the end of October, when they spun their 

 cocoons, attached to the bottom of the breeding jar. 

 They did not make a hole for the expulsion of the 

 frass, which is very fine and powdery. Nor, as already 

 remarked, did they, previous to spinning, become of a 

 slate colour, thus differing from the larvse of the other 

 gall-makers found in berry-shaped galls. 



The pupa was white. The imago made its appear- 

 ance on the 1st May, about fourteen days after becoming 

 a pupa. 



100. NEMATUS SALIOIS-CINEEE^B. 

 Vol. I, PL V, fig. 7, Gall. 



Tenthredo salicis cinerea, Betz., Degeer, 319 ; De Vil., Lin. Ent., 



iii, 113, 89 ; Degeer, Mem., ii, 1013, 

 25 ; Tab. 38, f. 2631. 



intercus, Pz, F. G., Heft 90, pi. xi. 

 Nematus gallarum, Htg., Blattw., 220, 55. 



saliceti, var., Zett., I. L., 351, 49. 



Foerster, Verb. pr. Rhein., xi, 336. 



mminalis, Vol., Tijd., ii, 145, pi. 10; Br. and Zad., Schr. 



Ges. Konig., xvi, Taf. 6, f. 11 ; 1. c., 

 xxiv, 345 ; Andre, Species, i, 140, 

 pi. x, f. 8; Cat, 17,* 76. 



astivus, Thorns., Opusc, Ent., 638, 51. 



cinerete, Thorns., Hym. Sc., i, 160, 94. 

 Degeeri, Dufour, Ann. Soc. Ent., Fr., 1847, 583. 



