TRACHEATA 



311 



brown colour. In external appearance it is very like its larger 

 subtropical congener Scolopendra. 



The head bears the multiarticulate antennae, 

 with about forty segments, and just behind their 

 insertion, the eyes, which are composed of 

 twenty-five to forty single eyes grouped together. 

 Immediately behind the head, and articulated 

 with it, is the very narrow segment which bears 

 ventrally the poison claws. Behind this are 

 fifteen similar segments, nine of which are 

 larger than the others, and somewhat irregularly 

 arranged ; each segment is covered dorsally by 

 a squarish tergum ; the difference in size of the 

 segments is not apparent on the ventral surface, 

 the sterna being all of the same size. The terga 

 and sterna are connected laterally by a soft 

 flexible skin which bears the stigmata. 



Appendages of lAfhcMus forficatus. 



1. Antennae. 4. Limb-like appendages. 



2. Mandibles. 5. Poison claws. 



3. Maxillae. 6-20. Fifteen walking-legs. 



The appendages are: (i.) the antennae; (ii.) ^'%^;-lZ''^: 

 a pair of mandibles with a toothed cutting edge, tans. After 

 they are jointed, but, like those of Insects, are 

 devoid of a palp (Fig. 178); (iii.) a pair of t Basilar terete. ^' 

 maxiUae, consisting of a palp and a fused median "-^^^ postceph- 



,. r \ • f V u Ti J ^'"= appendage 



portion; (iv.) a pair or limb-uke appendages (=thirdpostorai). 

 turned forward, with their bases in contact. <^- Ti^^ postceph- 



alic appendage. 



Behind this are (v.) the poison claws, a pair of e. Antenna, 

 stout large claws which contain in their last "^pS^app^ndage 

 two joints the poison gland ; the duct of this (=poison claw), 

 opens on the . convex side of the apex. In ^jendi^s^niLg^d 

 Scolopendra a large basilar segment succeeds the and turned back- 

 head ; this consists of four embryonic segments 

 fused, and bears iv. and v., and sometimes a pair of walking 

 legs, but the latter are frequently lost in the adult (Fig. 177). 

 They do not occur in lAthohius. 



The remaining fifteen segments bear each a pair of seven- 

 jointed legs, arising on the lateral margin of the ventral sur- 



