1911] Lithobiomorpha of Southeastern States 35 



latter becoming paler, yellowish, distad; venter yellowish to light 

 brown, the caudal plates reddish; legs brown, paler proximally than dis- 

 tally; last pairs of legs darker, blackish proximally, pale distad. 



Antennae very long; composed of forty-three articles which are 

 short. 



The ocelli of the single pair very large. 



Prosternal teeth 3+3. 



Angles of the sixth, seventh, ninth, eleventh and thirteenth dorsal 

 plates produced. 



Coxal pores 3, 4, 4, 4. 



The process at distal end of anterior pairs of legs apically acutely 

 spinesccnt. (See PI. 4, fig. 2). 



Anal legs long and slender. 



Claw of gonopods entire; basal spines 2+2. 



Length ad 10.5 mm.; width of tenth plate 1.6 mm. 



Localities. — Johnson City, Tenn.; Natural Bridge, Va. 



Genus Watobius gen. nov. 



First leg-bearing segment without spiracles. 



A number of pairs of ocelli present, these forming a patch on each 

 side of the head as in Lithobius, a caudal one in the place of the so-called 

 single ocellus in the latter genus and the others toward the base of the 

 antenna. 



Tarsi of all legs biarticulate. 



Legs without true spines excepting one at distal end of tibia of 

 anterior legs in place occupied by the process in the preceding genera. 



Fifth joint in penult legs of male greatly enlarged, the anal (in type) 

 not modified. 



Both sexes occurring. 



Type. — Watobius anderisus sp. nov. 



5. Watobius anderisus sp. nov. 



.Slender, attenuated from the tenth dorsal plate cephalad, more 

 abruptly caudad. 



Brown, the ultimate segments often darker; head and prehensorial 

 feet conspicuously darker, deep brown or brownish black; antennae 

 brown, pale distad; legs light brown, the posterior pairs having a pur- 

 plish tinge, the anal and penult pairs abruptly pale distad of the femur, 

 the tibiae in the penult legs especially pale. 



Angles of the ninth, eleventh and thirteenth dorsal plates produced. 



Antennae short; in most composed of twenty- two articles, in some 

 of but twenty; articles decreasing in length gradually and uniformly 

 from the first to the penult. 



Ocelli on each side composed of one large posterior one, in place of 

 the single one in Zygethobius, etc., and of eight smaller ones in a patch 

 arranged in three series; thus, 1+3, 3, 2. 



Prosternal teeth 2 + 2. 



Angles of the ninth, eleventh and thirteenth dorsal plates produced. 



