THE ENTOMOLOGIST. 6 



Life-histories of Sawjlies. Translated from the Dutch of 

 M. S. C. Snellen van Vollenhoven by J. W. May, Esq. 



(Continued from vol. vii. p. 271.) 

 CiMBEX LUCORUM, L. 



Imago: Linu. S. Nat. 12 ecL, No. 1527; Fabr. Ent. Syst. ii. 

 105, No. 2 ; Klug. Vers. Cimb. p. 85, No. 4 ; Hartig, 

 Biatt-und Holzwespen, p. 68, No, 3. 



Larva : Brischke unci Zaddach in Sclirift d. K. Phys. Oekon. 

 Gesells. zu Konigsb, iii. p. 257, No. 7; pi. ii. fig. 7. 



Cimbex nigra fusco villosa, an tennis rufo anuulatis, tibiis 

 tarsisque fulvis. 



I have at last succeeded in rearing the larva of Cimbex 

 Lucorum. It may, perhaps, be remembered that in the year 

 1843 I published, in the ' Tijdschrift voor natruulijke 

 Geschiedenis en Physiologic' of Messrs. Van der Hoeven and 

 De Vriese, a paper on the larva of Cimbex Lucorum, and that 

 some years later I explained, in the second volume of this 

 publication (' Tijdschrift voor Entomologie'), that I had been 

 mistaken in the name. I have since reared many species of 

 the same genus, some of which have been figured and 

 described, but I had not succeeded in obtaining the species, 

 whose name I had misapplied, until last year, when the larva 

 was sent to me from Gelderland. It is again to my friend, 

 De Roo van Westmaas, that I am indebted for my acquaint- 

 ance with this larva. At the end of June, 1867, he kindly 

 sent to me two young larva?, taken near Velp on birch. In 

 colour and appearance they exactly resembled the larva of 

 Betuleti (see vol. ii. pi. 3, fig. 1); but as the latter feeds 

 exclusively on hawthorn, — and I had learned from the paper 

 of Prof. Zaddach, referred to at the head of this description, 

 that Cimbex Lucorum fed on the birch, — I determined to 

 wait and see whether a subsequent moult would reveal any 

 difference between it and the species I had already described ; 

 and this proved to be the case. After the last moult a con- 

 siderable difference was observable : the larva was paler, and 

 of a more bluish green than that of Betuleti ; tlie skin was 

 smoother, and not so thickly granulated with white points; 

 the shape, and colour, of the spot on the head was different; 



