70 THE CANADIAN ENTOMOLOGIST. 



Coxal pores round, 3, 4, 4, 3. 



Claw of the gonopods of the female tripartite, one lateral lobe 

 commonly small, and sometimes almost obliterated, leaving the claw 

 bipartite. Basal spines 2 + 2. 



Length, ad 8 mm. 



Locality, Manitou (author, 1910). 



Numerous specimens, agreeing mostly with the description above, 

 were secured. These bring the species still closer to L exigmis Meinert, 

 from which, however, all the western specimens examined seem to present 

 constant differences. 



LitJiobiiis coloradensis Cockerell, 

 Syn. Lithobius kochii Stuxberg, BoUman, 1888, Proc. U. S. N. M. 

 Lithobius kochii, var. coloradensis Cockerell, 1893, Tr. A. 



Ent. Soc. 

 Lithobius kochii Stuxburg, Chamberlin, 1909 (in part), Ann. 

 Ent. Soc. America. 

 Reported from West Cliff (Cockerell, collector) by Bollman. Several 

 specimens in bad shape, in having lost the last pairs of legs, but seeming 

 to be this species, were secured by Prof. Cockerell in Boulder Co. and 

 sent to the author. The specimens seen, upon careful study are found 

 not to be identical with the California form. 



Lithobius jowe7isis Meinert. 

 Syn. L. bilabiatus Bollman (nee Wood), 1887, Proc. U. S. N. M, 

 L. bruneri Kenyon, 1893, Canadian Entomologist. 



No dorsal plates with angles produced. 



Antennae with 20-25 articles, the number of articles of the left antenna 

 exceeding those of the right in the Colorado specimens examined. 



Ocelli about 14, in 4 series : i + 4, 4, 3, 2. 



Prosternal teeth 2 + 3-3 + 3. 



Last three pairs of coxae dorsally armed ; last two pairs laterally 

 armed. 



Spines of 1st legs 2, 3, 1-2, 3, 2 ; of penult i, 3, 3, 2 ; the claw 

 armed with two spines ; of anal i, 3, 2, i, the claw unarmed. 



Coxal pores round, 3, 4, 4, 3. 



Gonopods in female with the claw entire ; basal spines conical, 2 + 2. 



Length, 11- 15 mm. 



Locality, Manitou (author, 1910). 



Several specimens agreeing essentially with the description above 

 were secured. 



