48 THE ENTOMOLOGIST. 



the antennae appeared motionless. The copulation did not 

 last much longer than a minute, when the female pushed 

 away the male with two strong kicks, and then took to flight ; 

 the male remained quite still for some moments, and then 

 also flew away, and betook himself to the elder-bush, where 

 he roved about for some time, until I lost sight of him. The 

 female is 1 centimetre long, the male 8 or 9 mm. : both are 

 black, dull on the head and thorax ; abdomen and legs 

 shining. The following parts are white (that is to say, 

 bluish white during life, and either sordid white or ivory after 

 death) : in the female, the clypeus either entirely or only on 

 the margin ; the tip of the labrum : in the male both are 

 entirely white; the palpi with white rings or wholly white, 

 differing in individuals : some have two small white triangular 

 spots on the head. In both sexes the superior margin of the 

 collar and the anterior margin of the shoulder-plates are also 

 white; likewise, in the female, two very small points on the 

 sculellum ; and in both sexes the cenchri, and the border of 

 the first abdominal ring on the dorsum. The following parts 

 of the leg are white in both sexes, though in the female to a 

 somewhat less extent than in the male, namely, the trochanters 

 of all the legs, the whole of the anterior surface of the first 

 pair, with the exception of the coxae, the extremity of the 

 femur of the intermediate pair anteriorly with that of the 

 tarsi, and a broad ring round the tibiae ; on the last pair, the 

 extremities of the coxa?, a spot (very large in the female) on 

 the posterior surface, and a broad ring on the femur; the 

 posterior tarsi are black. Lastly, there is a white spot on the 

 dorsum of the last abdominal segment in the female, the 

 anal appendages in the male being also white ; the abdominal 

 rings in this sex having gray margins during the life of the 

 insect. 



It need not be said that the male is more slender than the 

 female ; there was also a difference in the antennae, especially 

 recognizable in the living insect. In the male these organs 

 are somewhat shorter and thicker (see fig. 15), and the joints 

 more equal in breadth, and thus less easily distinguishable, 

 while in the female each joint is smaller at the base than at 

 the apex ; the wings are smoke-coloured and iridescent, the 

 anterior pair being somewhat darker than the posterior. 



About a fortnight after I had observed the last images on 



