U68 Thk Zoologist— December, 1868. 



doubt on account of its short compressed figure that Linnaeus gave it 

 the name of Tenthredo ovata. 



The perfect insect is 9 millimetres long and expands to 16 mm. 

 The head is black, somewhat shining and punctured, more especially 

 on the sides behind the eyes; just above the place of insertion of the 

 antennas are two larger smooth pretty deep depressions, as if intended 

 to contain the first two joints of the antennas. From one of these 

 depressions rises a narrow band which traverses the forehead, running 

 round the most anterior of the three ocelli, and ends in the depression 

 of the opposite side. Vertex and forehead are clothed with fine gray 

 hairs. Mandibles very acute ; palpi pale. 



The antennae are 9-jointed. The first joint rounded, the second 

 cup-shaped, the third cylindrical, thicker at the end and longer than 

 the two preceding joints together. These three joints are black, as is 

 also the greater part of the fourth, which is of the same form as the 

 preceding one, but is little more than half the length ; the fifth joint is 

 broader, but inserted obliquely into the fourth ; the following joints 

 become gradually shorter and narrower, so that the antenna is pointed 

 at its termination. From the apex of the fourth joint the antennae are 

 black on the outer side only, for the rest white (fig. 9). I do not find 

 that any author has hitherto noticed the oblique insertion of the fifth 

 joint. 



The prothorax, the sides and the anterior triangular division of the 

 mesothorax are bright red, shining and sparsely hirsute. The sides 

 of the breast, the scutellum and the part of the dorsum imme- 

 diately behind it are thickly punctured; cenchri and tegulse 

 brownish. 



"N lags iridescent, more or less smoke-coloured ; in some individuals 

 a pale brown band traverses the anterior wings. The anterior division 

 of the anal cell is obliquely divided, so that this insect belongs to the 

 third section, Eriocampa, of Hartig. The thickened stigma and the 

 remaining nervines are black or very deep brown, the only exception 

 being that the costal nervure is white at the base. The abdomen 

 being flat above and somewhat curved below, its section is triangular; 

 it is, moreover, smooth, shining, black; the apex above the ovipositor 

 is clothed with shining silvery hairs ; a considerable portion of the 

 legs is similarly clothed — these latter are black with white bands 

 round the bases of the tibiae, those of the posterior tibiae being the 

 broadest. 



Fig. 10 represents the saw and ovipositor highly magnified ; they 



