172 KANSAS UNIVERSITY SCIENCE BULLETIN. 



EE. Male genital appendages olougiite; termini-.l spine large, 

 spiral, furnished with n long, fali-iform, basal spinule, 

 and a second short, robust lateral one. 



Leptodesmua plaoidus. 

 DD. Back flat, scaly; lateral carinse serrate. 



E, Repugnatorial pores surrounded by a round swelling; 

 scales on scuta arranged in 4 transverse rows. 



SrytnnotuA (jvannlattift. 

 EE. Repugnatorial pores surrounded by a long, oval swell- 

 ing; scales arranged in 3 transverse rows. 



F. Length from 15 to 18.5 mm., Polydesinus pinetorum. 

 FF. Length from 22 to 27 ram.. . . Poli/demius aerraln^. 

 A A. Segments 30; repugnatorial pores absent; anal segment produced into two slender 

 papilla*; dorsal face of each segment provided with 6 bristles; carina? reduced. 



Cleidogona up? 

 AAA. Segments more than 30; repugnatorial pores present. 



B. Male genital appendage formed from anterior pair of legs of 7th segment; 

 sides and back with numerous keels; anal segment not produced into 



spine Lysiopetatutn lactarium. 



BB. Male genital appendage formed from both pairs of legs of 7th segment; no 

 carina? or keels; anal segment produced into spine. 



0. None of anterior segments apodous Actobolus inarginatus. 



CO. Third segment apodous; male genital appendages composed of two parts 

 eaoh. 



D. Inner part of male appendage curving towards opposite side 

 and crossing with opposite similar part; outer part ending in 

 one blunt point. 

 K. Outer part of male appendage narrow in proportion to 



length (9:34) Parajvhia venvstuH. 



EE. Outer portion of mule appendage wider (lfi;34) 



Parajulus impressu.t. 



DD. Inner part of mule appendage curving caudad, meeting in a 



raid line, but not crossing as above; outer part ending in two 



blunt points Parajulua diveraifroits. 



**■ Not more than one pair of feet to the segment; antenuap many segmented; two pairs of 

 maxillae (Chilopoda). 

 A. Pairs of leirs. 15; young born with 7 pairs. 



is. Tarsi of le§:s muUiartitiuhite; dors^il plutes, 8; spiracles, 6, in one series, 



niiddorsal Scuttgera force;)S. 



BB. Tarsi of leg.s triartit-ulate ; dorsal plates, 15; spiracles in, two series, lateral. 

 C Inside of annl legs with strongly marked, irregular swellings. 



Poabius hilabiatvs, 

 CC. Anal legs not as above. 



D. Angles of 7th, 9th, 11th and 13 Mi dorsal plates produced; 



prosternal teeth, 10 to 14 1.ithobhis transmarhiits. 



DD Angles of 9th, 11th and l?th dorsal plates produced; pro- 

 sternal teeth, S to 12 Lithobius forficat-us 



DDD Angles of the 11th and ISth icr i3th only) dorsal platus 



produced; prosternal teeth, 4 Lithobius kanaensis. 



DDDD. Angles of none of dor.sal plates produced; prosternal teeth, 



4 to 6 Lithobins joivensis. 



AA. Pairs of legs, 21; young born with .same number; ocelli, 4. 



B. First dorsal phitf with a deep transverse furrow back of anterior margin. 



C. Oephalif plati- with two fine longitudinal lines, which diverge cephalad. 



Scolopendra herns. 



('C. C'ephalir plalf without furrows as above. . . .Scolopendra polymorph^i. 



BB. First dorsal iilate without a deep transverse furrow hack of autt'rior margin. 



Scolopeiidra morsitans. 

 AAA. Pairs of legs, 23. yOung born with same number; ocelli absent. 



Otorryptopa sexspinosus 



