1902.] NATURAL SCIENCES OF PHILADELPHIA. 39 



A NEW GENUS AND THREE NEW SPECIES OF CHILOPODS. 

 BY RALPH V. CHAMBERLIN. 



Heretofore no ScoIopendricUe of the sub -family Cryptopiuse have 

 been reported from the Pacific States, and in consequence the 

 author's present announcement of the finding of two new species 

 belonging to this group in California will be of interest to myriapo- 

 dists. Of these two species one belongs to the genus Theatops, 

 making the third known from the United States, while the other 

 represents a new genus, in some respects intermediate between 

 Cryptops and Theatops. But two mature specimens of the latter 

 species being in the collection, no detailed examination of the 

 mouth parts has been possible, and accordingly a complete descrip- 

 tion of the genus is not now presented. Its general relationships 

 will be understood from the diagnosis assigned in the analysis. 



The new Lithobius here described belongs to that group in which 

 the coxal pores are arranged in several series {Bothopolys) . Its 

 nearest relative, as seen from the key to the American species, is 

 Lithobius xanti (Wood), which is found in California and Oregon, 

 itself coming from the AVahsatch Mountains, Utah. 



Analysis of the Genera of Cryptopinoe, 



tti. — Last dorsal plate not enlarged ; anal legs but little crassate. 

 61. — Ocelli present, single, . . . Eremops Bollman. 1. 

 63. — Ocelli absent or indistinct. 



Ci. — First and second tarsal joints of anal legs toothed 

 below; claw of anal legs unarmed; last pleurse 

 free, without processes ; anal and genital segment 

 very short, without a dorsal scutum, 



Cryptops Leach. 2. 

 c.^. — First and second tarsal joints of anal legs unarmed 

 below ; claw of anal legs armed with two spines ; 

 last pleurse not exposed laterally, with strong pro- 

 cesses posteriorly ; anal and genital segment not 

 shortened, dorsal scutum present, 



Anethops gen. nov. 3. 



a^. — Last dorsal plate twice as long as the preceding; anal legs 



strongly crassate, Theatops Newport. 4. 



