EXTERNAL ANATOMY OF INSECTS. 689 
of appendages with which the tarsi are furnished. They 
are seldom armed, like the ¢ibz@, with teeth, or spines, 
or horns; but something of the kind occasionally distin- 
guishes them. In Phileurus, Oryctes, and several other 
Dynastide, the first joint is armed at the apex externally 
with a considerable mucro; in the fore-leg of Dasytes 
ater a similar process is prolonged into a crooked horn’. 
But the most important appendages of the ¢arsz are the 
claws which almost universally arm their extremity, and 
which appear clearly analogous to those of birds, qua- 
drupeds, &c., though probably differing as to their sub- 
stance>, Some few, however, are without them; this, as 
I lately observed, is the case with Phancus with respect 
to the four posterior legs; the anterior ones of Vanessa 
amongst the Lepidoptera, and all those of Stylops and 
many Acari L., are also without them: this is likewise 
the case with the first pair of legs, or the second of the 
pedipalps of Galeodes. In this genus these organs con- 
sist of two joints®. With respect to number they vary 
in different tribes, but not so much as the calcaria: these 
variations may likewise be represented by three numbers. 
The most natural is ¢wo in all the'tarsz, exhibited by the 
Predaceous beetles and the great majority; 2.2.1. are 
to be found in Hoplia, Anisonyx, &c.4; 1.2.2. in Belo- 
stoma ; three in all the legs inthe Araneide* ; in Meloe *, 
Elater, &c., each claw is double or consisting of two, 
which makes four in each leg; and in many Eproboscidea 
* Prate XXVII. Fic. 26. w’. b See above, p. 395. 
© L.. Dufour Deser. de six Arachnides. Annales, &c. 1820. 19. 
4 Prate XXVII. Fic. 51. is the posterior claw of Hoplia. 
e Prate XXIII Fic, 14. f Prats XXVIL. Fic. 52. 
VOL, IIL, ZY 
