79 



Rev. T. A. Marshall's monograph of 



front one of these beetles; but Eatzeburg has since 

 made further observations of great interest (Ichn. d. 

 Forst., iii., 61), showing that the parasite deposits its 

 egg not in the larva but in the imago of the Coccinella. 

 Three CoccinclUe, of the species above named, were 

 watched by Eatzeburg, they having attached themselves 

 to some plant and remaining motionless. After a short 

 time there was found beneath the belly of each a grey, 

 pyriform, somewhat transparent cocoon, beset with loose 

 filaments, in which the legs of the beetles were entangled. 

 From these cocoons emerged, between June 10th and 

 14th, three females of P. terminatus. Two of the 

 Coccinella were by this time dead, but the third 

 continued to linger. The parasitic maggots issued from 

 the sutures of the ventral segments, which afterwards 

 closed up, leaving no visible aperture. Dissection of 

 one Coccinella showed the inside to be completely 

 wasted, and the walls of the abdomen collapsed. On a 

 second occasion Eatzeburg introduced a lively $ Perilitus 

 into a glass-topped box containing a Coccinella septem- 

 punctata. The parasite immediately began to pay 

 attention to the victim, moving about with great activity, 

 and examining it on every side. Finally she assumed 

 the characteristic attitude of an Ichneumon preparing to 

 strike, by thrusting the abdomen forwards between the 

 legs, so as to project beyond the head. The abdomen 

 became greatly attenuated, and the terebra extended to 

 its utmost length, supported and embraced by its valves 

 as far as they could reach. Six to ten punctures were 

 made in one minute, always directed towards the ventral 

 sutures. In the course of an hour three or four such 

 attacks were made upon the Coccinella, which seemed 

 unconscious of any danger, and seldom winced. No 

 danger however existed, for the Perilitus was not fecun- 

 dated, and the whole proceeding was only a fruitless 

 exhibition of an instinct. 



Table of Spect 3. 



I. First cubital areolet separated from the prae- 

 di^coiclal. Dicliori, Hal., Dinocamptus, 

 Forst. 

 (5) 2. Radial areolet ending nearer to the tip of the 

 wing than to the stigma, sublanceolate. 

 Terebra straight. 



