The Glow- Worm and Other Beetles 



ous row. Lastly, at the opposite end is a 

 little pit, the sign of the anal pore. 



Of the six pseudochrysalids which a lucky 

 accident placed at my disposal, four were 

 dead; the other two were furnished by Zo- 

 nitis mutica. This justified my forecast, 

 which from the first, with analogy for my 

 guide, made me attribute these curious or- 

 ganizations to the genus Zonitis. The 

 meloidal parasite of the Osmiae, therefore, 

 is recognized. We have still to make the 

 acquaintance of the primary larva, which 

 gets itself carried by the Osmia into the cell 

 full of honey, and the tertiary larva, the one 

 which, at a given moment, must be found con- 

 tained in the pseudochrysalis, a larva which 

 will be succeeded by the nymph. 



Let us recapitulate the strange metamor- 

 phoses which I have sketched. Every 

 Beetle-larva, before attaining the nymphal 

 stage, undergoes a greater or smaller num- 

 ber of moults, of changes of skin; but these 

 moults, which are intended to favour the de- 

 velopment of the larva by ridding it of co- 

 vering that has become too tight for it, in no 

 way alter its external shape. After any 

 moult that it may have undergone, the larva 

 retains the same characteristics. If it begin 

 by being tough, it will not become tender; if 

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