THE MYRIAPODA OF NORTH AMERICA. 167 



ff. Claw of prehensorial legs with a basal tooth Linot.enia" Koch. 



ee. Penultimate pair of legs short and thick, attenuated, clawless ; seg- 

 ments about 150 STYLOUEMUSi Karsch 



cc. Exterior part of first maxilhe entire. 



h. Claw of prehensorial legs entire ; dorsal plates silicate. 



MeinertiaJ Bollman. 

 lili. Claw of prehensorial legs biincised; dorsal plates not sulcate. 



Dignathodon Meinert. 

 aa. Mandibles with a dental plate and several pectinate plates. 

 i. Dorsal plates sulcate. 

 j. Mandibles with several pectinate plates. 



Stigmatogaster Latzel. 

 jj. Mandibles with a single pectinate plate. 



k. Claw of max. palpus pectinate; labrum free in the middle; 

 outer part of first maxilhe with trace of palpiform process. 



Pectiniunguis^ Bollman. 



kk. Claw of max. palpus not pectinate; labrum not free in the 



middle ; outer part of first maxilhe without trace of palpi. 



form process Sciiendyla Bergsoe and Meinert. 



ii. Dorsal plates not sulcate Bothriogaster Szeliwanoif. 



Subfamily VII. — Himantariin^e. 



Analysis of the genera of Himantarihuv. 



a. Pleural plates between spiracle and dorsal plates in one row. 

 b. Spiracle plate much larger than the prescutellum; mandibular stipes with 



7 or 8 pectinate plates Orya Meinert. 



bb. Spiracle plate almost as large as the prescutellum; mandibular stipes with 4 



or 5 pectinate plates Orphn,eus Meinert. 



aa. Pleural plates between spiracle and dorsal plates in two or three series, 

 c. None of the posterior segments tuberculate. 

 d. Spiracle plate larger than the prescutellum; pleurae of anal segment 



small, not porous Notiphilides Latzel. 



dd. Spiracle plate smaller than the prescutellum; pleurae of anal segment 



very large, porous Himantarium Koch. 



cc. Some of the posterior segments tuberculate Gonibregmatus Newport. 



Indiana University, May IS, 1S89. 



* Lhiotwnia Koch (=Scoliopla»es Bergsoe and Meinert). 



tThis genus may not belong here. Karsch's description is very indefinite and is 

 compared with Linotcenia and Himantarium. 



t Me'mertia — Nom. gen. nov. for Sootophilus Meinert, which is preoccupied. Named 

 after Dr. Fred. Meinert, of Copenhagen. 



§ Pectiniunguis Bollman. [Bull 46. U. S. Nat. Mus., p. 113.] This genus is divisible 

 into two subgenera : 



a. Anal pair of legs 6-jointed Pectiniunguis. 



aa. Anal pair of legs 5-jointed ; Nannopus Bollman 



