LIFE-HISTORIES OF SAWFLIES. TAS 
red. The third joint of the antenne red, with black base 
(fig. 10). Abdomen, segments 3 to 6 red. The legs had all the 
tibie purplish red-brown, and the tarsi yellowish brown-red. 
Further, the same as fig. 7. 
I have already mentioned, in my ‘ New Catalogue of Indi- 
genous Hymenoptera,’ that entirely black females of Cumbex 
sylvarum occur in the Netherlands, and Mr. A. A. van Bemmelen 
obtained such an example from a cocoon found at Driebergen. 
In addition to these differences in coloration Zaddach mentions 
two others, both in female examples. In one the abdomen, 
which was black, had some of its segments ornamented with two 
yellow spots (C. decemmaculata, Leach); in the other the whole 
insect was brownish yellow, with the exception of the dorsum of 
the thorax, a spot on the pectus, and the base of the abdomen. 
As far as I have been able to learn these varieties have not been 
found to occur in the Netherlands. 
In conclusion I must here add from my note-book the 
description of a larva received on the 18th of September, 1862, 
from Mr. de Roo van Westmaas. It was found at Velp, in 
a lane of elm and beech trees, and was full grown, so that it had 
already begun to spin up when I received it. The size was the 
same as that of C. lutea from the willow. Head pale yellow, 
trophi greenish, under-hp brown. Eyes small, black, with very 
small shining black rings round them. Body yellowish green, 
yellow at the sides on the last two segments; a narrow blue 
dorsal line, not beginning at the head, and only proceeding 
as far as the eleventh segment. The sides of the body and 
the posterior segments closely set with white spines; spiracles 
oval, shining black; the excretory openings above them purple. 
All the legs yellowish green; claws brown. This larva did 
not undergo its metamorphosis. To what species can it have 
belonged? ‘The description agrees very well with our species 
Sylvarum, excepting the words “spiracles oval.” In addition 
to this the statement that 1t was found in an avenue formed 
entirely by elms and beeches does not seem to point to a species 
feeding exclusively on birch. 
