PREFACE. Xlii 



of the fins and tail, with the fpinofe and foft 

 rays in each ; the turn of the lateral line, 

 with the form, colour and difpofition of 

 the fcales. 



In infefts, the feafon when each of the 

 different kinds appear fhould be obferved ; 

 the number, fubftance, and particular fhape 

 of their wings, with the pofition of them 

 when the infeft is at reft ; the fhape of the 

 antennae or horns, with the number of joints 

 in each ; the form of the head, mouth and 

 eyes, more particularly of the head in 

 beetles, of the mouth in bees, wafps, flies, 

 and gnats, and of the eyes in fpiders ; the 

 number and fize of the legs ; the fhape of 

 the thighs, feet and claws ; the ftmgs pecu- 

 liar to the hymenoptera clafs, and the ufes 

 they are applied to : but the natural hifto- 

 ry of infefts mould in a peculiar manner 

 engage the traveller's attention, as it is of 

 more confequence to difcover the natural 

 hiftory of one deftru&ive or ufeful in (eft, 

 than merely to colleft and bring over twenty 

 in their perfect ftate ; the former, at the 

 fame time that it makes the feieoce more 

 entertaining, bids fair to benefit mankind, 

 while the latter ferves only to fill the cabi- 

 nets of the curious ; he Ihould therefore 

 carefully obferve the manner in which in- 



fe6is 



