ORGANS FOR BREATHING IN WATER-GRUBS. 157 



like the grub of the gnat, \vc know not, but they 

 perfectly repel water ; and at the point wiiere the 

 insect liangs suspended, a small dimple may be ob- 

 served on the surlace. When it wishes to dive to the 

 bottom, it has the power ot' bringing the ends of the 

 hairs together, without diminishing the ca[)acity of the 

 funnel below ; and a globule of air, for the purpose of 

 breathing under water, is thus enclosed and carried 

 down, appearing, as Swammerdam says, like a bril- 

 liant pearl or polished silver. ' As for my part,' he 

 adds, ' I dare boldly affirm, that the incom[)rchensible 

 greatness of the Deity manifests itself in these mys- 

 terious operations in a particular manner, and affords 

 us an opportunity of examining, as it were, with our 

 senses, the divine nature.'*^ 



Biioy-like itructure In rlic Uiil of a water-grub cir» two-viinjed fly 

 'Strittiomy-i Chianaleon.) 



part 



1 I 



