ARTHEOPOD FAUNA OF THE WEST INDIES. 457 



This species, described from a single female, is unknown to me. 

 In colour, which, is perhaps one o£ the best specific characters 

 for the genus, it appears to resemble closely the foregoing. On 

 account, however, of its much greater size, 1 refrain from uniting 

 the two. 



Pamily ScoLOPENDHiDiE. 



The West-Indian genera of this family may be recognized as 

 follows : — 



a. With 23 pairs of legs ; eyes absent ; tarso-meta- 

 tarsi of most of the legs entire; prosternal 

 plates of maxillipedes absent. 

 a^. Anal legs without claw and with multi -arti- 

 culated tarso-metatarsus ; sulci of sterna 

 cross-shaped, and of terga four in number. . Newportia. 

 b^. Anal legs normal ; terga and sterna without 

 sulci, or bisulcate. 



d^. Seventh somite without stigmata Otocryptops. 



6^. Seventh somite with stigmata Scolopocryptops. 



h. With 21 pairs of legs. 



a^. Eyes absent ; prosternal plates absent ; 

 tarso-metatarsi of most of the legs 

 undivided ; terga and sterna sulcate as 



in Newportia Cryptops. 



6^. Four eyes on each side of the head ; pro- 

 sternal plates present ; tarso-metatarsi 

 of all the legs divided, 

 a*. The seventh segment with a pair of 



stigmata, the rest as in Otostigma . . Rhysida. 

 bK The seventh segment without stigmata, 

 a'. Head-plate not overlapping the first 

 tergite ; stigmata small and sub- 

 circular. 

 a^. Head not sulcate ; basal plate 

 invisible ; anal legs long and 

 slender, and with small claws . . Otostigma. 

 i*. Head sulcate ; basal plate visible ; 

 anal legs shorter, very thick, 



with large claw Cupipes. 



b'. Head overlapping the first tergite ; 



stigmata large or elongate Scolopendra. 



Li>N. JOrilN. — ZOOLOGY, YOL. XXIV. 35 



