Séance du li Janvier 1^)21 27 



(livides) is tho same aflor Ihe moult as heforc. The 

 only indication that the division may take place in the 

 neifihbouihood oi" the ^h'd joint is that the divisions 

 between Ihe 7nd, Sui and /ith joints hecomes very 

 indistinct jnst hel'oro mouUin^^ Tlie transformation 

 irom 7 to î> joints mnst lake place at tlie mouh, 

 becansf no I'lilly devcdopird imUxidual is (^ver seen 

 Avith cS joints. \\ lien the terminal joint has divided 

 llit.rt^ ai'c al\\a\s i) joints and examination of the cast 

 skins of the 2nd monlt sho>\s tlial I lie aniennae in 

 these vNcre T jointed. 



There is no diffciencc between the sexes in the 

 Ist larval staj.'-e and it is not until the first moult that 

 any appears. The male presnmably then enters tlie Isl 

 pupal staj.;e. 1 have been imsuccesfnl isolating this 

 sta^e probably because it is very similai' to tlie monlt- 

 itjii' female. \ second moull then takes ])lace and Ihe 

 r>nd |)upal staf.;e is entercMl into. I hav(> seen many 

 examples of males in this sta^e and they have already 

 been desciibetl above. Finally the fully developed 

 male emerfres and proceeds to fulfil its mission in 

 life before dyinf.^ Veiy little is known at ])resenl a- 

 bout the development of the male oi' the lengths of 

 the various stages. 



]^(;production in the \ast majority of cases takes 

 plac(> jjarthenoirenelically. Males only occur in very 

 small numbers before August and even later in the 

 year the ])roportion of males to females is very low. 

 Thionj-diout the months when breeding- is proceeding- 

 rapidly paithenogenesis takes place and thr increase in 

 males late in the year may give rise to a hai-dier gener- 

 ation, to meet winter conditions. 



