het 
CHAMBERLIN: CHILOPODS FROM MEXICO AND WEST INDIES. 511 
CHILENOPHILIDAE. 
NESIDIPHILUS, gen. nov. 
Head with frontal plate usually not set off by distinct suture 
but this sometimes present or indicated by a pale line. Basal plate 
wide; trapeziform; overlapped by the cephalic plate. Dorsal plates 
bisuleate. 
Antennae filiform, short. 
Labrum free; tripartite. The median piece large; bearing along 
the caudal margin a series of long stout teeth of which the median 
ones are largest. Lateral pieces fringed with paler, distally more 
slender, spinescent processes. 
Second maxillae with coxae completely united at middle, the isthmus 
moderately wide cephalocaudally and as well chitinized as the more 
lateral portions. Pleurosternal-sutures strongly developed. The 
sclerite ordinarily appearing at caudal angles of inconspicuous size 
is in this genus large and extended cephalomesad parallel with suture, 
being separated caudally by a narrow slit but elsewhere united with 
portion of plate adjoining the suture. From between the anterior 
ends of these inner sclerites extends cephalad a median tongue-like 
chitinous process (Plate 5, fig. 3). Palpus triarticulate, terminating 
in a simple claw of moderate size. None of articles with a process. 
First maxillae with two long membranous lappets on each side. Inner 
division set off by a distinct suture. Coxae completely fused. 
Prehensors large; conspicuously exposed from above and extending 
much beyond front margin of head. Claw commonly serrulate proxi- 
mally within; always armed at base with a stout black conical tooth. 
Femuroid armed within near distal end with a larger distally rounded 
process which is paler and less strongly chitinized than the tooth of 
claw, of about same color as rest of article. Other articles unarmed. 
No chitinous lines on prosternum. ) 
Ventral pores numerous; arranged in four areas, one on each 
quarter of plate toward anterior or caudal margin as case may be. 
Spiracles circular excepting the first one which is vertically more or 
less elongate and of large size. 
Last ventral plate narrow; its sides strongly converging caudad. 
Tergite of last pediferous segment broad, being anteriorly as wide 
as the preceding tergite; sides convex; largely concealing the coxo- 
pleurae from above (Plate 5, fig. 3). 
Coxopleurae moderately inflated but not unusually elongate and 
not at all exposed at sides of last prescutum. Pores small and very 
numerous; most abundant dorsally and ventrally along and beneath 
edges of dorsal and ventral plate, fewer laterally and caudal end. 
