THE MYRIAPODA OF NORTH AMERICA. 161 



Subfamily XVI. SPH^ERIODESMIN^E. 



Analysis of the genera. 



(i. The fourth and fifth dorsal plates largest; some of the posterior with a row of 

 tubercles ....................................... Si'ir.i:i;i<>i>KsMrs 1'etern. 



aa. The third and fourth dorsal plates largest; dorsal plates tubereulated. 



CYPIIOIM>MI s Peters. 

 '(ii. The third dorsal plate largest; dorsal plates smooth. 



CYCLODESMUS Humb. and Sauss. 

 aaaa. The second dorsal plate largest. 



1). Anal segment small ...................... ONISCODESMVS Gervais and Goudot. 



bb. Aual segment large as in the Glomerhhv .............. CYRTOOKSMUS Gervais. 



Order III. ONISCOMORPH A. 



Tliis order contains the family (}loiiu'>-i<l<r, which is related to the 

 preceding' family. 



Family VII. (ILOMERID^B. 



Analysix of the subfamilies of Glomeridir. 



a. Segments 13; plenral plates 11 or 12; pairs of legs 9 21, <? 23; ocelli in more than 

 one series .................................... SPH/EROTHERHN.K. XVII. 



aa. Segments 11 or 12 ; pleura! plates 10 ; pairs of legs 9 17, $ 19 ; ocelli in a single 

 series ............................................. GLOMERIIN.E. XVIII. 



aaa. Segments 9; antennae 5-joiuted ; ocelli in several series. . .OLIGASPIIX.E.* XIX. 



Sub-family XVII. SPH^ERIOTHERIIN^;. 



Analysis of the genera of SphceriotheriincB. 



a. Antennse 7-jointed, the sixth joint smaller than the fifth. SPH.EROTHERIUM Brandt. 

 a((. Antenna? 6-jointed, the sixth much larger than the tifth ....... ZEPHROXIA Gray. 



Subfamily XVIII. GLOMERIIN.E. 



Analysis of the genera of Glonieriinn . 



a. Mentum bipartite ; dorsal plates smooth, not marginate. 



/;. Copulation feet of the male 5-jointcd, rudiug in n simjile, weak, crooked joint, 

 which boars a short and thick bristle; 12 dorsal plates plainly developed. 



<JI.OMF.KIS Latreille. 



bb. Copulation foot of male 3-jointed, ending in a shear or forceps-like piece, \\liich 

 does not bear a bristle; only 11 dorsal plates plainly developed. 



LAT/.KI.IA t Bollman. 



aa. Mentum entire; dorsal plates warty and scaly, their borders strongly margined. 



GERVAIMA \Vaa. 





Subfamily XIX. 



Contains the South- African genus Oli<i<iNi>iN Wood. 



If Wood's description of the, genus (Hii/tix/tix is correct it should re])reseiit :i ue\v 

 subfamily. As shown by the figures his types are adult speriniens. 



t Lat:tl'i gen. uov. Type: (Unmi'i-ix minium Lat/cl. I have named this new genus 

 after Dr. Robert Lat/el, of Vienna, the illustrious Austrian myriapodist . and the 

 deftcriber of (Hnmrrix iniiiitun. 



LMH7 No. 4!' - 11 



