4 THE ENTOMOLOGIST. 
third group (if one may say of the two former that they each 
separately form a group); and there remain in addition 
C. connata, Schr., Sylvarum, F., Femorata, Z., and perhaps 
Fagi, Zadd., respecting which it is not yet proved, not only 
whether it be indigenous, but also whether it be a species. 
This last group was regarded by Klug and subsequently 
by Hartig, following the first-named author, as forming one 
species, Cimbex variabilis, which name I adopted in my first 
catalogue. It is, however, quite certain, and has been shown 
by repeated observations of its metamorphosis, that C. con- 
nata, the first species in my new catalogue, is a distinctly 
separate species; its metamorphosis is described and figured 
in the seventh volume of this publication* (p, 59 et seq., 
pl. 1 and 2). With about equal certainty, chiefly relying on 
the different coloration of the female, it may be taken that 
Sylvarum, #’. (Betule, Zadd.), is a true species. Perhaps 
Fagi will have to be referred to this last species; this is, 
however, doubtful, if, as Brischke considers, the larva displays 
fixed distinguishing characteristics, and feeds exclusively on 
beech. ‘There remains, lastly, one other species, feeding on 
willows, and which will form the subject of this paper. 
There is, however, another difficulty with regard to this 
species. Brischke, who found these insects in great numbers, 
divides them into two groups: the one, which remains of a 
sordid green colour during the whole of its larval existence, 
lives, according to this author, on smooth-leaved willows; 
the other, which at the latter period of its larval state 
becomes reddish, or even flesh-coloured, lives on the leaves 
of the goat-willow (Salix caprea). I have never seen 
these red larvae, but, at the same time, I have never met with 
Cimbex larve on the goat-willow. This being so, we are 
not much concerned with the question whether this larva, 
which is only known to us by description, really represents a 
species or not. Nevertheless, should the pale variety Pallens 
be produced from it, and, as Brischke asserts, from it alone, 
it would occur in the neighbourhood of Arnhem. 
Although willows are very numerous in our well-watered 
country, the larger insects inhabiting this species of tree are 
never met with in large quantities. Perhaps excursions, 
* ‘Tijdschrift voor Entomologie’; translated in ‘ Zoologist’ for 
July, 1869. 
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