The Glow-Worm and Other Beetles 



ing the nymphal state, passes through four 

 forms, which I call the primary larva, the 

 secondary larva, the pseudochrysalis and the 

 tertiary larva. The passage from one of 

 these forms to the next is effected by a simple 

 moult, without any changes in the viscera. 



The primary larva is leathery and settles 

 on the Bee's body. Its object is to get itself 

 carried into a cell filled with honey. On 

 reaching the cell, it devours the Bee's egg; 

 and its part is played. 



The secondary larva is soft and differs 

 completely from the primary larva in its ex- 

 ternal characteristics. It feeds upon the 

 honey contained in the usurped cell. 



The pseudochrysalis is a body deprived 

 of all movement and clad in horny in- 

 teguments which may be compared with those 

 of the pupae and chrysalids. On these in- 

 teguments we see a cephalic mask without 

 distinct or movable parts, six tubercles in- 

 dicating the legs and nine pairs of breathing- 

 holes. In the Sitares the pseudochrysalis is 

 enclosed in a sort of sealed pouch and in the 

 Zonites in a tight-fitting bag formed of the 

 skin of the secondary larva. In the Meloes 

 it is simply half-sheathed in the split skin of 

 the secondary larva. 



The tertiary larva reproduces almost ex- 

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