THE MYRIAPODA OF NORTH AMERICA. 171 



1870. Helerostomn Humb. & Sauss. Rev. et Mag. Zool., 202. 

 ISSO.Scolopt-ndrii Humb. A:. Sauss. Rev. et Mag. Zool., 203. 



1881. Scoloprndridrx <incltixtro)ihi Kohlrausch. Archiv f. Naturg. (used an a tribe of 

 t Scol. cribrif&res). 



.\imlyx\x of tlic t/< in i-(i a f Scolopendrince, 



a. Pairs of spiracles M. 



b. Spiracles not branchiform. 



c. Claw of max. palpus simple, unarmed; anal pair of legs short and crassate. 



ASAXADA Meiuert. 



cc. Claw of max. palpus armed on the inner side with two teeth. 

 d. Claw of anal pair of legs not crenulate beneath. 

 e. Cephalic plate subcordiform, usually partly covering first dorsal plate. 



SCOLOPEXPRA. III. 

 ee. Cephalic plate rounded or quadrate and partly concealed by first dorsa. 



plate CORMOCEPHALUS Newport. 



dd. Claw of anal pair of legs crenulate beneath RIIODA Meiuert. 



bb. .Spiracles braiichiforin. 



/. Claw of max. palpus armed on the inner side with a long, acute tooth; 



anal pair of legs normal OTOSTIGM A Porath. 



ff. Claw of max. palpus armed on the inner side with two long, acute 

 teeth; anal pair of legs not normal. 



g. Tarsi of anal legs much depressed EUCORYBAS Gerstacker. 



<jg. Tarsi not flattened; leg short and thick CUPIPES Kohlrausch. 



aa. Pairs of spiracles 10. 

 /(. Anal pair of legs normal. 



?. First spiracle snboval RHYSIDA. * IV- 



u. First spiracle-shaped TREMATOPTYCHUS Peters. 



hh. Anal pair of legs crassate; spiracle sieve-like.. DACETTM t Koch. 



Genus III. SCOLOPENDRA. 



1758. Scolopendra Liniupas. Syst. Nat., Ed. x., 637 (restricted by later authors to 

 morsitans}. 



Type. Scolopendra morsitana L. 



Etytnoloijy: axnloxevftpa) scolojx'iidrii. 



In the following key to the species of Scolopenflra I have adopted 

 Porath's name Colhifia as a- submenus iiiclndini;' all species which have 

 the femora of penultimate pair of legs spinons. The other groups es- 

 tablished, 1 think, are not worthy of subgmeric rank. 



* As liranchiiwloiiui Newport is pivneeupied (Costa, Pisces, 1S34), Ilhynidu Wood 

 must be used instead. 



t lli'terostoma Newport preoccupied (llartm., Moll.. 1S-13) and Ihwtuin Koeli must 

 take its place. 



