CHAMBERLIN: CHILOPODS FROM MEXICO AND WEST INDIES. 515 
NESIDIPHILUS NICARAGUAE, sp. nov. 
Dorsum light brown, becoming lighter, yellowish, caudad. Head 
and antennae dilute chestnut of weak ferruginous tinge. Prosternum 
and prehensors like the head. Venter yellow to testaceous. Legs 
testaceous to clear yellow. 
Body moderately robust, conspicuously narrowing caudad from 
middle but only very gradually and moderately narrowed cephalad. 
Cephalic plate about two thirds as wide as long. Sides back of 
suture nearly straight, slightly converging caudad and rounding in 
more strongly to a short strongly narrowed caudal portion of head. 
Frontal suture present. Punctae caudad of suture moderately coarse, 
not dense. Hairs sparse. Basal plate 3 times wider than long. 
Antennae thick and moderately long. Ultimate article clearly 
shorter than the two preceding ones taken together. 
Claws of prehensors when closed extending much beyond front 
margin of head and reaching to near distal end of second article. Claw 
armed at base with a stout, distally rounded black tooth. Femuroid 
with a more robust, distally rounded dark process or tooth projecting 
cephalomesad, this darker and more strongly chitinized than in the 
other known species of the genus. 
Prosternum wider than long in the ratio 5:4. Anterior margin 
between prehensors widely concave; a slight pale tooth on each side. 
Sides of prosternum parallel between anterior end and the convex 
caudal corners; 1.76 times longer than greater length of femuroid. 
Prescuta in anterior region short, becoming of moderate length in 
median region and then again decreasing in caudal region. 
Ventral plates with a distinct transverse sulcus crossed by a 
median longitudinal one, the impressions deepest at the point of 
crossing, there being a pit-like depression on this part of anterior 
plates. 
Last ventral plate narrow; its sides only slightly converging 
caudad, straight; caudal margin straight. 
Ventral pores numerous; chiefly in two large areas in front of 
caudal margin and separated by a poreless area along the sulcus; a 
smaller porose area on each anterior quarter as usual. 
First pair of legs shorter and much more slender than the second, 
the latter being intermediate in size between the first and the third. 
Anterior and posterior pairs in general scarcely differing in length or 
thickness. 
Coxopleurae moderately enlarged; surface densely perforated with 
very numerous small pores. 
Spiracles all circular; the first one much larger than the third with 
the second one intermediate in size; the others gradually decreasing 
caudad as usual. 
