INTERNAL ANATOMY OF INSECTS. 173 



than that of the male. I once observed a pair of Pen- 

 tatoma oleracea, a very pretty bug, in coitu, both sexes 

 being ornamented with while spots, and by them stood 

 a third distinguished from them by red ones. I do not, 

 however, build on this circumstance, though singular ; 

 but mention it merely that you may keep it in your eye. 

 It would be curious should it turn up, that, to answer 

 some particular end of PROVIDENCE, in some tribes of 

 insects there are two kinds of males, as in the gregarious 

 ones two descriptions of females. 



I am, &c. 



