ORDER TRACHEARIiE. 501 



Phalangium, 



Which have the forceps projecting, much shorter than the 

 body, and the eyes placed upon a common tubercle. 



Their feet are very long, very slender, and when detached 

 from the body, they exhibit, for a few instants, some signs of 

 irritability. The generative organ of the male has the form of 

 a dart, terminating in a semi-barb. The female has a mem- 

 braneous oviduct, in the form of a thread, flexible, and 

 annulated. The tracheas are tubular. 



Phalangium cornutum, Lin., male; Opilio, ejusd. female, 

 Herbst., Monog. phal. i. 3. male, ihid. i. female. Body oval, 

 reddish, or ash-colour above, white underneath, palpi long ; 

 two ranges of small spines on the tubercle which carries the 

 eyes, and prickles on the thighs. Forceps horned in the 

 male ; a blackish band with its edges festooned in the female. 



A celebrated English entomologist, Mr. Kirby, has formed, 

 under the name of Gonoleptes, a peculiar genus, or species, 

 which have the palpi spiny, with the last two articulations 

 almost of the same size, subovoid, and with a strong terminal 

 claw, and the haunches of the two posterior feet very large, 

 soldered together, and forming a plate under the body. These 

 feet are remote from the others, and thrown backwards. 



In phalangium proper, the palpi are filiform, without 

 spines, terminated by an articulation, much longer than the 

 preceding, and with a small hook at the end. All the feet 

 are approximated, with haunches similar and contiguous at 

 their origin. Such are all our indigenous species. 



SiRO, Latr., 



With projecting forceps almost as long as the body ; eyes 

 apart, and each carried on an isolated tubercle, or without 

 support. 



