6 THE ENTOMOLOGIST. 



and the stigmata (fig. 3) were elliptical, with a slight undula- 

 tion of the sides. Although there was no difference in the 

 shape of the head of my two larvae, the ground tone of the 

 colour was different, as was also the appearance of the pale, 

 sepia-coloured spot on the vertex. In one the colour was 

 faint reddish yellow, with two wedge-shaped transverse spots 

 separate from each other; in the other the head was yellow, 

 of the colour of wax, with a large transverse spot on the 

 vertex, terminating in a point at either end. In both, the 

 eyes, which were small, were placed in very deep black 

 round spots. The head of the first-named species is repre- 

 sented at fig. 2. 



Fig. 1 was drawn about a week too soon, as the larva was 

 not then full grown. They grow nearly to the size of fig. 2, 

 on plate 3 of the second volume, and then the little wart-like 

 eminences on the sides are more projecting, and are of a still 

 paler tint. Further, it will be hardly necessary to add that 

 the larva had twenty-two legs, but it is worthy of record that 

 the claws of the anterior legs were black. 



I have not been able to observe that the larvaj in question 

 had the faculty of ejecting fluid from their sides, as is the 

 case with other Cimbices ; I also failed to perceive any 

 openings or valves above the stigmata : the same negative 

 observation is made by Brischke. 



On the 25th of July the larvse began to spin up among the 

 twigs of the birch. The cocoon (fig. 4) was hard, and of a 

 brown colour. As I had only two cocoons I did not like to 

 open one, and so I am unable to say anything about the 

 pupa, which, in all probability, strongly resembles that of the 

 so nearly allied species. 



On the 9th of April of this year (1868) I found two males 

 alive in the box in which I had kept the cocoons, from which 

 a little round piece had been cut out in the usual way: we had 

 had rather warm and very sunny days towards the end of 

 March and the beginning of April. 



The following is a description of these tvv'o males, one of 

 which is represented, with the wings extended, at fig. 5 ; the 

 other, at rest, at fig. 6 : — 



At the first glance the whole body appears to be black, but 

 on closer examination it is seen to be of a dark, bronzy 

 earth-colour. The head below the antennae, the clypeus, 



