MYRIAPODA 



73 



are three genera, Scolopocryptops, Nexvportia, and Scolopendridcs, 

 all confined to the tropics. 



OTOCRYPTOPS SEXSPINOSUS (Say) Pocock. 



Cryptops sexspinosa Say, Jour. Phila. Acad., II, p. 112, 1821. 

 Scolopocryptops 6-spinosa Newport, Linn. Trans., p. 407 ; Cat. Myr. Brit. 



Mus., p. 57, 1856. 

 Scolopocryptops sexspinosus Meinert, Proc. Amer. Phil. Soc, p. 179, 1886; 



Myr. Mus. Haun., ill, p. 14, 1886. — Bollman, Bull. 46, U. S. Nat. 



Mus., p. 177, 1893. 

 Otocryptops punctatus Pocock, Ann. and Mag. Nat. Hist., 6, 8, vm, p. 159, 



1891. 

 Otocryptops sexspinosus Pocock, Ann. and Mag. Nat. Hist., 6, xv, p. 351, 



1895. 



Suborder GEOPHILOIDEA. 



ANALYTICAL KEY TO THE NORTHWEST AMERICAN FAMILIES 

 OF GEOPHILOIDEA. 



Body attenuated in front ; cephalic lamina and the broad prebasal 

 lamina covering the prehensorial legs Family Linot^eniid^e. 



Body as broad or broader in front than behind ; prehensorial legs 

 partially exposed at the sides of the cephalic lamina. 



Mandibles without dentate lamellae Family Geophilid^e. 



Mandibles with dentate lamellae Family Schendylid.e. 



Family LINOT^NIID^. 



A group confined, so far as known, to the temperate and arctic 

 regions of the Northern Hemisphere. The New World species seem 

 to be generically distinct from those of the Old World in details of 

 mouth parts, but externally they are closely similar. The head is pro- 

 portionally much smaller than in the other northern families of the 

 Geophiloidea, giving the animals a habit more similar to the Mediter- 

 ranean genus Dignatkodon and to the tropical family Ballophilidae, 

 than to the Geophilidte and the Schendylidae. 



Genus Tomotaenia Cook. 



Tomotcenia Cook, Am. Naturalist, xxix, p. 866, 1895. 



TOMOTAENIA CHIONOPHILA (Wood). 



Strigamia chionophila Wood, Jour. Phila. Acad. Sci., v, p. 50, 1862 ; Trans. 



Am. Phil. Soc, XIII, p. 189, 1865. 

 Scolioplanes chionophilus Meinert, Proc. Am. Phil. Soc, xxi, p. 223, 1885. 



