THE ENTOMOLOGIST. 7 
legs. The spiracles are bordered with black, the margins 
being somewhat expanded on the under side, so that they 
present the outline of a hart’s hoof; above them are the 
orifices of the glands. 
This larva differs from that of Connata in the absence of 
the yellow lines on the back next to the blue stripe; also in 
the ground colour being less green, and in having no row 
of darker dots above the spiracles; the skin below these is 
also less verrucose. [From the larva of Sylvarum it differs in 
being less yellow and more of a gray tint; the head also is 
darker, and the dorsal stripe begins higher up and extends 
further; it is also more verrucose below the spiracles. 
As regards food, Femorata eats the leaves of the willow, 
while Connata feeds on alder, and Sylvarum on birch. 
Femorata lives in the larva state from June to August or 
September. It does not pass the pupa state on the branches, 
but makes its cocoon in the mould or at the roots of the trees. 
The cocoon is of a dark colour. ‘The insect only enters into 
the pupa state a fortnight or three weeks before its emergence 
as an imago, which, like the other species, gnaws off a piece 
of the cocoon. Some larve remain two winters or, more 
accurately, a year and a half in the cocoon. 
The only difference between the male of this species and 
that of Connata is that the wings do not exhibit any blue 
tinge. I do not consider it necessary to give a detailed 
description of this insect; a comparison of figs. 4 and 5 with 
fig. 16 of plate 2, vol. vii., first series, will suffice. I should 
only say that the colour of the body appears to me to be 
darker, while the antenne are more entirely red. I cannot, 
however, state confidently that these characters always 
prevail. 
The female also differs very little from that of the species 
mentioned. The thorax, which is more of a bronze colour in 
Connata, is, together with the head, in this species more 
thickly covered with woolly, brownish yellow hairs. The 
purple of the abdomen is in this species much blacker, has 
less of a coppery tint, and generally does not extend so far 
backwards: for example, in Connata, segments 1 and 2 and 
a triangle on segment 3 are of that colour; in Femorata only 
the first segment, with triangles on the centre of two or more 
succeeding segments. 
