1918] Chamberlin—New Polydesmoid Diplopods 125 
men somewhat smoky brown with the lateral carine paler, yellow- 
ish. A dark median longitudinal dorsal line is evident in the pos- 
terior portion, Antenne and legs yellowish. 
A slender species narrowed decidedly at the ends but elsewhere 
uniform in width. The posterior margins of the anterior somites 
are bent back slightly, those of the succeeding ones in going caudad 
more and more strongly so. The posterior corners of the last three 
pairs of carine strongly produced caudad but not acute, the distal 
ends being strongly rounded, the corners of the others more angular. 
Vertigial sulcus ending as usual at the angle of a transverse arcu- 
ate sulcus between the antennal sockets, the latter sulcus much 
weaker than the vertigial and becoming obscure toward the ends. 
In the male the sternites in the region caudad of the gonopods 
are produced at the ends, adjacent to the legs, caudad into sharp, 
straight conical processes; on the anterior half of the fourth somite 
are two distally rounded, subconical processes. The genital proc- 
esses of the second coxe are slenderly conical and short and pro- 
ject subcaudad. Coxe unarmed. In what is regarded as the 
female of this species the sternites are not produced but the coxee of 
the middle and posterior regions are at their distal ends produced 
ventrad into acutely tipped conical processes which decrease in 
size in going cephalad. 
The species is readily distinguished by the character of the male 
gonopods. The principal branch is above the basal joint subcylin- 
drical to below middle of length where it is abruptly narrowed into 
a slender blade which is moderately curved, but not at all coiled, 
its acute tip meeting that of the opposite gonopod at the median 
line. The caudal branch is long though not quite reaching the end 
of the main branch; it presents a decided double or sigmoid 
flexure, the acute tip bending across that of the other one; at the 
level of the first flexure on the ventral side there is a short acute 
spur. 
Length of type (male) near 27 mm.; width, 5.5 mm. 
Locality: East Tennessee: Burbank. A male and female col- 
lected by Dr. R. Thaxter. 
Nannaria media sp. nov. 
When in full color this species is deep chestnut above with the 
posterior corners of the lateral carine yellow. Beneath the color 
