1918] Myriopods from Georgia and Louisiana 379 



First dorsal plate 1.7 times wider than long, widest anteriorly; 

 sides converging caudad, evenly convex. Posterior comers of ninth and 

 eleventh dorsal plates distinctly obliquely excised more on caudal side, 

 those of the thirteenth plate less distinctly so. 



Coxal pores- small and circular; 2, 3, 3, 2. 



Spines of anal legs,||^^^ or ^^^^ (™ale), claws 2; of 

 penult. 1^;^. claws 2; of thirteenth, |M^; of the twelfth 



1 ' ' , 0, 0, 0, 1, 1 



- ^' ^' ^' ^' ; of the tenth, ' ' ' n " 

 0,0,1,1,0' '0,0,1,1,0 



Claw of female gonopods of uniform width, tripartite, the lobes very 

 short the lateral equal and the median one but little exceeding these 

 Inner and outer basal spines equal or very nearly so; acuminate distal 

 division very short, subobtuse. 



Length of female, 6 mm. ; of male only 4 mm. 



Locality.— Ga.: Okefenokee Swamp; Billy's Id., June, 1912. 

 One female and one male. 



Neolithobius helius sp. nov. 

 General color of dorsum brown, the head chestnut. Antennas 

 chestnut, paler, yellowish, distally. Legs yellowish, the posterior pairs 

 darker, brown to chestnut, but with the distal joints bright orange or 



^^ Head subcordate, but anteriorly truncate between the antenna; and 

 the caudal margin excepting at ends straight or nearly so. Wider than 

 long in the ratio 7.5:6. 



Antenna moderately long, reaching to the seVenth pediferous 

 segment. Articles typically from thirty to thirty-three m number, 

 short and very short, the ultimate variable in proportionate length 

 sometimes equalling the two preceding ones and sometimes much 

 shorter Subdensely setose distally, more sparsely setose proximally. 



Prostemum ^vith distance between chitinous spots three times the 

 length of the dental line. Lateral sloping margins conspicuously 

 incurved. Prosternal teeth mostly rather small, mostly 5 + 5, but also 

 5_}_6 6+6 6+7, and 7+7, the most mesal teeth on each side often 

 much reduced and lower in position. Mesal incision very narrow. 



Ocelli forming a compact oblong area. Ocelli arranged mostly m 

 four to six longitudinal series with the single ocellus much larger, pale: 

 e. g., one 6, 5, 5, 4, and one 6, 7, 6, 5, 3. 



First dorsal plate across its anterior end only a little narrower than 

 the head and equal in width to the third plate. 



Coxal pores very small, circular. Examples of arrangement and 

 number: 4, 5, 5, 4; 5, 6, 6, 4. 



