CHAMBERLIN: CHILOPODS FROM MEXICO AND WEST INDIES. 509 
ectal end extended cephalad into a conspicuous process which re- 
sembles a large proximal joint to the palpus which it bears, giving 
the latter the appearance of being triarticulate. Palpus distinctly 
biarticulate, the second article large, bending about distal end of 
inner process; no lappets present. Inner process set off by a distinct 
suture. Second maxillae with coxae completely coalesced. Palpus 
not long; ending in a large simple claw. ~ 
Prehensors small; largely concealed by head in dorsal view; wholly 
unarmed. Claw slender but not constricted or excavated proximally; 
when closed extending a little distance beyond front margin of head. 
Prosternum with chitinous lines strongly developed but incomplete 
cephalad. 
Ventral pores in a transverse band in front of caudal margin, the 
band commonly divided at middle. 
Last ventral plate wide. 
Coxopleurae each with pores opening as two pits of moderate size 
at edge of sternite. 
Anal pores not manifest. 
Anal legs composed of six articles distad of coxopleurae; clawless. 
GrnotyPe.— P. lestes, sp. nov. 
Apparently most closely related to Agathothus, from which it differs 
in having the inner branch of the first maxillae separated off by a 
suture, the outer branch elevated on a distinct process of coxa, the 
prosternum provided with chitinous lines, coxopleural pores in form of 
two pits on each side,:and the anal legs clawless. 
PAGOTAENIA LESTES, sp. nov. 
Dorsum light greenish brown; darker, clearer brown. cephalad; 
lightest caudad. Head, antennae, prosternum, and prehensors dilute 
chestnut. Venter of greenish brown cast. Legs pale brownish. 
Body of typical Linotaenia form being strongly narrowed from 
middle region both caudad and cephalad; entire body clothed with 
numerous straight short hairs. . 
Head small with true frontal suture not present, but a pale line in 
its place more or less traceable. Wider than long in ratio 12:11. 
Anterior or frontal portion semicircularly rounded, or the anterior 
margin mesally somewhat angulate. Sides convex. Head widest 
between frontal region and caudal end. Caudal border a very little 
overlapped by the basal plate. A median longitudinal sulcus evident 
on posterior portion. Hairs short, numerous. Basal plate wide; 
