EXTERNAL ANATOMY OF INSECTS. 659 



twelve in the hexapods that have fallen under my notice, 

 by six dots. 



1. ;• In this arrangement the legs are all planted 

 near to each other, there being little or no interval be- 

 tween the pairs, and between the legs of each pair. It 

 is exemplified in the Leptdoptera, Blatta, and many 

 Diptera. 



2. -i Similar to the preceding, but the anterior pair 

 are distant from the two posterior ; exemplified in the 

 bees [Apis) and most Hymenoptera ,• Chironomus; Scu- 

 tellera ; P achy soma K. a 



3. :: Like the last, but the posterior pair is distant 

 from the two anterior. Examples: Silpha, Necrophorus, 

 Telephorus, &c. 



4*. . :: . Similar to the last, but the legs of the posterior 

 pair are more distant from each other than the four an- 

 terior. Ex. Curculio L. 



5. •• The legs of each pair near each other, but the 

 pairs distant. Ex. Gibbium. 



6. • • Both the legs of each pair and the pairs distant. 

 Ex. Blaps, &c. 



7. ..". Anterior pair distant from the two posterior, 

 and the legs of the middle pair rather moi'e distant 

 from each other than those of the other pairs. Ex. Sca- 

 rab(Bus M C L. 



8. i'\ Like the preceding, only the legs of the mid- 

 dle pair are at a much greater distance from each other. 

 Ex. Copris M C L. 



9. :"; Leo-s of the two posterior pairs distant. Ex. 



Hister, Scaphidium. 



1 It is by this arrangement of the legs that Pachysomia is princi- 

 pally distinguished, as a subgenus, from Scarab&m M'L. 



2 U 2 



