CHAMBERLIN: CHILOPODS FROM MEXICO AND WEST INDIES. 507 
Ventral pores small and few, arranged as usual in a narrow trans- 
verse band a little behind the middle of the sternite. 
Last ventral plate wide. 
Coxopleural glands opening into two large pits on each side. 
Anal legs each consisting of six joints distad of the coxopleura; 
terminating in a well-developed claw. 
GENOTYPE.— G. ochrus, sp. nov. 
This genus is at once distinguishable from Timpina and Sogona, 
the other genera of the family, in having the anal leg armed with a 
distinct claw, and in lacking lappets on the first maxillae. 
GARRINA OCHRUS, sp. nov. 
Bright yellow, the color a little duller and somewhat dusky over 
middle. Head similar but color duller, darker caudad of suture 
antennae yellow of very faint brownish tinge. Prosternum yellow 
of dilute chestnut cast. Venter and legs clear yellow. 
Body moderate, of nearly uniform width over much of length, but 
at very anterior portion strongly narrowed to the small head and over 
the caudal third of length gradually and considerably narrowing. 
Head with no frontal suture; anterior border subtriangular; widest 
back of middle. Caudal margin wide; weakly excurved at middle 
and incurved toward each end. Equal in length and breadth. Basal 
plate with front margin concave, overlapped at sides by cephalic 
plate but mesally leaving prebasal plate exposed. Very wide, wider 
across base than the head (41:37). 
Antennae approximate at base; first several articles broad and 
flattened, the antennae narrowing rapidly and becoming filiform 
distally. Short; slightly more than 2.5 times length of cephalic 
plate. Ultimate article nearly equalling the two preceding ones 
taken together. 
Claws of prehensors moderately stout; when closed attaling front 
margin of head. Prehensors wholly unarmed. 
Margin of prosternum between prehensors rather short; straight 
excepting for a weak median emargination. Sides straight and only 
slightly converging from anterior end back to the convex caudal por- 
tion. Wider than long in ratio 47:35; about 3.33 + times longer than 
greatest length of femuroid. Chitinous lines strongly developed, 
complete. 
First dorsal plate anteriorly a little wider than the basal plate and 
much wider than the second tergite; sides convex, converging to the 
very strongly oblique caudal corners, the line of truncation of the 
corners being much more nearly horizontal than longitudinal. Dorsal 
