INCREASE IN SIZE OF EGGS. 



121 



of the eggs of some increasing in size during the pro- 

 cess ol' liiitcliing. 1 he lact ii[pears to have first been 

 not iced by the celc l)ruted Valhsnieri in his observa- 

 tions on saw-liies {Ti)ithn(Hni(Uv, Leach).* Other 

 instances were subsequently discovered by R'aumur, 

 De Geer, Derhani, R sel, and the younger Huber, 

 ' It oirght not,' says R auinur, speaking of gall flies 

 {Cijiiipiila', Westwood), 'to be passed in silence, 

 that the vgfr which I found in the gall appeared to 

 me considerably larger than the eggs of the same spe- 

 cies when they prcceed from the body of the fly, or 

 even w hen tluv are taken from the mother fly near the 

 time of their being laid. The whole of those 1 took 

 from the mother flies which I killed were remarkably 



1*. ==«^ 



Generation of a water-mite (Hijrlrit'hna nbstcr^ens). 

 a o, the wnler scoipion, in vlii'se liody the mite fives her epgs. 

 6 i, a mapniOed view ol one of its claws. .-, a tioth-hke l^roce^s for 

 restrainii g the motion ol the joint, rf, the watei mite. <, a greatly 

 magnified view i,f one of iL> eggs. /, the hook by which it is iuseited 

 into the body of the scorpion. 



* See Insect Architecture, pp. 157-8. 

 VI. 11 



