;321 



necessary Avitli the hind and middle legs. The tip of the 

 abdomen is bent down in both sexes and after some manipu- 

 lation the female straightens ont the tip of the abdomen, ex- 

 . tends the long hidden terminal segment and intromission 

 follows. The male during intromission keeps in constant up 

 and down motion on the hind legs as a ])ivot l)ending the head, 

 prothorax. and tip of the abdomen. Separation appears to 

 take place in response to movements of the long last seg- 

 ments of the female in search for suitable places for ovipo- 

 istion. 



The combats between the males seemed very mild, males 

 disputing possession of a female with the one in possession 

 Ijeing fought away with the hind and middle legs and if 

 persistent to some extent with the jaws. If the lualc liad 

 been in possession for some time, however, he seems often to 

 give up the struggle readily. It was noticeable that at first 

 in a tube containing a large male and several smaller ones 

 and only a single female, tli(^.l^rg;e. male was able to keep pos- 

 session for a considerable time, bu.t was finally replaced by 

 smaller ones. 



The adults paid no attention to honey placed with them 

 for food. Mating and oviposition continued from early in the 

 afternoon, when they were first placed under observation, until 

 sundown at least, and indeed throughout the next day. 



Eggs laid June 13 at about 2 :;30 p. m. were not hatched 

 on June 16 but were found to have hatched by 10 a. m. June 

 IS and the young larvae found in the tube where they had 

 been placed, escape from the egg having taken place through 

 a slit in the proximal end. The first instar larva is legless, 

 not unlike the older ones, and the middle of its body, its eni]ity 

 mid-gut constitutes a large airspace. 



From eggs laid in the lab(u'at(>rv during July, adults were 

 secured in i)-2 days, the indoor lu-eeding indicating about 

 tWo luonths as the usual time required for the development 

 from egg to adult. 



From the branches of Euphorbia brought in to breed out 



