EXTERNAL ANATOMY OF INSECTS. 679 



m this Order is represented by 0:0:4; this you will see 

 in all the Locusts; in Acrida, Conocephala, Pterophylla ; 

 and in Truxalis, Pneumora, &c; in Phasma there are 

 none. v In Mantis, if the terminal process of the cubitus 

 is excluded, it will be 0:2:2; in Gryllotalpa, admitting 

 the terminal teeth of that part 3 as analogues of spurs, 

 the number is 4:4:1; in Tridactylus Latr. 0:0:5 b ; in 

 Gryllus Latr. 3:3:5; in Gryllus monstrosus, 4:4:6. In 

 the whole Hemiptera Order I have discovered no instance 

 of an insect furnished with the real spurs : for though in 

 Tettigonia F., Cercopis, &c., there are implanted spines in 

 the posterior tibia, and several at the apex, there are none 

 of them clearly analogous to real spurs. In the Lepido- 

 ptera the most general arrangement appears to be -J-: 2:-|; 

 and next to this, ^:2:2. In this Order most commonly 

 there is no spur at the end of the cubit, but one resem- 

 bling a thumb c arms its middle ; in Pieris, &c, this 

 thumb is not present, so that the number is 0:2:2; in 

 Agai-ista Leach, JSrebus, &c, you will find -£-: 2: 4, the 

 posterior cdlcaria being all terminal ; and in Attacus 

 Atlas, all these organs are obsolete except the thumb. 

 In the Neuroptera the most general arrangement is 

 2:2:2; but in the Libellulina, although the legs are very 

 spinose, there are no spurs. In the Trichoptera K., in 

 Phryganea rhombica and affinities, the number of them 

 is expressed by £:+:£; and in those with long antennas, 

 P. atra, &c, by f :f :•§. In the Hymenoptera the number 

 1:2:2 is most prevalent ; and next to this, as in Apis L., 

 1:1:2. In the Ichneumones minuti L. the spurs are 



a Plate XV. Fig. 6. v" . b Coquebert Illuslr.Ic. iii. 



/. xxlf. 3. D. ° Plate XXVII. Fig. 29. v ". 



