370 Annals Entomological Society of America [Vol. XI, 



DIPLOPODA. 



Cleidogona sp. 

 A number of specimens not yet adult. All are in the stage 

 possessing twenty-three segments and are not at this time 

 determinable as to species with certainty. They were taken on 

 Billy's Id., Okefenokee Swamp, in June, 1912. 



Leptodesmus hispidipes (Wood) . 

 Numerous specimens taken near Creston, La., in February, 

 March and May, 1915. 



Leptodesmus okefenokensis sp. nov. 



This is a smaller species than hispidipes, which it in general resem- 

 bles. There is no trace of a median dorsal drak line, the dorsum being 

 clear testaceous with no distinct markings excepting the caringe which 

 are lighter, yellow, though there is a rather vaguely lighter border 

 caudally on some of the somites. 



Somites in general smooth and shining, not at all tuberculate or 

 roughened. 



Vertigial sulcus of head deep, extending ventrad to a little above 

 level of antennae, with two setae on each side. Antennae long, the 

 ultimate article and the distal end of the penult blackened. 



Each end of first dorsal plate subacute, narrowly rounded. Posterior 

 margin of second and third plates straight, the keels not at all produced 

 caudad. Posterior corners of other plates produced caudad, more 

 strongly so in posterior region. Pores opening laterally or slightly 

 above the thickened border of keels which are slightly incurved at 

 level of pores. 



Anal tergite of usual form, distally truncate and a little decurved, 

 with three long setae on each side. Anal scale semicircular in outline. 

 Anal valves mesally margined, the borders being strongly though 

 narrowly elevated. 



Ventral plates without processes in male. Plates smooth and most 

 glabrous or nearly so. 



In the gonopods of the male the proximal division is rounded. It 

 bears two completely separated branches of which the smaller proximal 

 one meets and crosses the one of opposite gonopod in the middle line. 

 The principal branch of each gonopod is curved caudad and then dorsad, 

 crossing the other one at its tip; distally it is bifurcate, the outer blade 

 being much the more slender and bending first away and then again 

 towards the proncipal process; the branch as a whole is densely setose 

 on its mesal surface proximad of its middle, being elsewhere glabrous in 

 striking contrast to the conditions in hispidipes, from which the bifurcate 

 tip and other structural features also remove it. 



Length, cir. 21 mm. Width, 3.7 mm. 



Locality. — Okefenokee Swamp: Billy's Id., Dec, 1913. 

 One male. 



