260 DESCRIPTIONS OF LITHOBIID^E AND SCUTIGERID^. 



Spines of the first pair of feet, 2, 3, 2 ; penultimate, 1, 3, 3, 2 ; last 

 pair 1, 3, 3. 2. 



Last pair of feet moderat3ly long and swollen. 



Claw of the female genitalia not wide, indistinct tripartite, the middle 

 lobe much longer; spines slender, the inner shortest. 



Length of body, 16""" ; last pair of legs 9™'". 



Eabltat.—JJkiQh, Cal. (J. H. Burke), and Mexico. 



This species is described from one female, from the former locality, 

 which has the antennae and posterior legs broken off". Having only a 

 short description of aztecus, I do not feel sure of my identification, 

 although it agrees with it as far as it goes. 



11. Lithobius foi-ficatus Liunicus. 



Scolopendra forficata Linnieus, Syst. Nat. Ed. x, I, 638, 1758. 

 Lithobius forjicat us Leach, Edhib.,Enoycl., vii, 408,1815. 



Brown, of varying shades ; feet and ventral laminjB paler; tip of an- 

 tennae rufus. 



Kobust, not smooth; a little hirsute, especially posteriorly, and along 

 the edges of the dorsal laminie. 



Head large, subquadrate, much wider than long (8: 5. 5), rough, 

 punctate, esi)ecially the frontal plate. 



Antenna) long, joints 33-43, mostly short, densely hirsute. 



Ocelli distinct or not, 23-48, arranged in G-8 series. 



Prosternal teeth moderate, 8-12. 



Coxal pores G, 0, 6, 4-9, 10, 9, 0, transverse or round in younger 

 specimens. 



Spines of the first pair of feet, 2, 3, 2; penultimate, 1, 3, 3, 2; last 

 pair 1, 3, 3, 2. 



Posterior feet long, not much inflated. 



Claw of the female genitalia trilobed, the middle lobe much longer; 

 spines short, robust, the inner shortest. 



Length of body, 18-28"^'" ; last pair of feet lO"^^'. 



Habitat. — Eastern United States. 



I have examined about a dozen specimens of this species from Lud- 

 ington, Mich., and one from Bloomington, Ind. One female has the 

 claw of the genitalia four-lobed — having two divisions on the inner 

 side of the middle lobe. 



The following is a description of a young specimen: 



Antenme 32 jointed. 



Ocelli 14, in G series. 



Prosternal teeth 6-10. 



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



Spines of the first pair of feet, 2, 3, 2 ; penultimate 1, 3, 3, 1 ; last 

 pair, 1, 3, 2, 0. 



Length of body, 11™"" ; last pair of feet 4'"™. 



