176 BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



Genus IV.— RHYSIDA. 



1844. — Branchiostoma Newport. Trans. Linn. Soc, 411 (UthoMoides), 

 1862.— Bhysida Wood. Journ. Acad. Nat. Sci. Phila., 40. 



Type. — Branchiostoma UthoMoides Newport. 



Etymology: pv<r6q, corrugated. 



As Branchiostoma Newport is preoccupied {Branchiostoma Costa, 

 1834, Pisces), Dr. Wood in 1862 jDroposed the genus Bhysida. 



This name has always been disregarded, but, as Newport's name is 

 preoccupied, we must use Bhysida in its place. 



This genus contains the following species : 



• 12. Rhysida celer. 



1870. — Branchiostoma celer Humbert and Saussure, Eev. et Mag. Zool., 202 (Carolina) ; 

 Saussure and Humbert, Etud. Myr., 122, Tab. VI, f. 16, 187; Kohlrausch, 

 Archiv Naturg., 69, 1878; Meinert, Proc. Amer. Pbil. Soc, 183, 1886 [Kings- 

 ton, Jamaica; Polvon, Nicaragua); Meinert, Myr. Mus. Haun., in, 18, 1886 

 (Riacho del Oro, Buenos Ayres); Underwood, Ent. Amer., 63, 1887. 



Habitat. — Central America, West Indies; Carolina (Saussure). 



Etymology. — Lat., quick. 



The locality (Carolina) assigned to this species by Humbert and 

 Saussure is probably erroneous and no doubt their specimen was from 

 Mexico or some West Indian island, where, on the same trip, most of 

 their collecting was done. For a description of this species see " Mein- 

 ert, Proc. Amer. Phil. Soc, 183, 1886." 



Subfamily IV. — Scolopendropsenue. 



1844. — Scolopendrinw Newport. Trans. Linn. Soc, 378 (in part). 



1847, — Scolopendrides heteropodes Gervais. Apteres, iv, 243. 



1870. — Scolopendropsii Humbert and Saussure, Eev. and Mag. Zo61., 204, 



Analysis of the genera of Scolopendropsime. 



a. Ocelli present ; tarsi triarticulate Scolopendropsis Brandt. 



aa. Ocelli absent. 



o. Tarsi of anal legs triarticulate. 

 c. Dorsal plates not sulcate, first without a transverse sulcus as in many species 



of Scolopendra, last somewhat pointed Scolopocryptops. — V. 



cc. Dorsal plates bisulcate, first transversely, last not pointed. 



Otocryctops Haase. 

 ob. Tarsi of anal pair of legs 14-jointed Newportia Gervais. 



Genus V.- SCOLOPOCRYPTOPS. 



1844. — Scolopocryptoi>s Newport. Trans. Linn. Soc, 405 (miersi). 



Type. — Scolopocryptops miersi Newport. 



Etymology. — axoXonev^pa^ scolopendra; z^uttto?, concealed; ^<p, eye, 



