512 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Anal leg with six joints distad of the coxopleurae. Unarmed or 
with obscure trace of claw. Not long. 
GENoTYPE.— M. latus, sp. nov. 
This genus corresponds in part to Polycricus as used by Cook but 
does not embrace the type of that genus (P. toltecus) as given by its 
authors, Humbert and Saussure. In addition to the genotype, Neszdi- 
philus includes N. montis, sp. nov., N. nicaraguae, sp. nov. and N. 
marginalis (Meinert), Polycricus floridanus Cook being a synonym of 
the last mentioned species. 
NESIDIPHILUS LATUS, sp. Nov. 
Dorsum rather dark brown with anteriorly a black median stripe 
which posteriorly becomes geminate and may be there indistinct; 
margins of plates and pleural sclerites may be mottled with purplish 
much as in marginalis. Head typically of a chestnut cast. Antennae 
brown, somewhat paler at tips. Prosternum and prehensors like 
head. Venter a lighter brown than the dorsum. Legs testaceous. 
Body broad, robust; strongly narrowed from the middle caudad 
but only moderately narrowing cephalad to the head. 
Head with place of suture taken by a pale line from the level of 
which cephalad the head is somewhat constricted. Anterior margin 
convex, the part between bases of antennae straight or a little concave. 
Head distinctly narrowing from near frontal region caudad to caudal 
region where the sides convexly round in and converge to the straight 
caudal margin. Nearly two thirds as wide as long (ratio in type 
60:97). Basal plate 3.45 times wider than long; coarsely punctate. 
Antennae short being only about 2.33 times longer than the head. 
Ultimate article scarcely narrowed distad, apically well rounded; 
three fourths as long as the two preceding ones taken together. 
Claws of prehensors when closed reaching to between proximal and 
distal ends of second article of antennae. Claws stout, proximally 
serrulate or finely crenulate on mesal side; armed at base with a 
stout conical black tooth and distad of this showing a dark low emi- 
nence. Femuroid distally with a stout well-rounded nodular process 
which is pale. Other articles unarmed. 
Sinus of prosternum semicircular, shallow; a low dark nodular 
eminence or tooth on each side of it. Sides a little converging caudad, 
at middle of length very slightly incurved. Free portion nearly 
1.2 times longer than greatest length; 1.7 times longer than greatest 
length of femuroid. Subdensely punctate. 
Dorsal plates deeply bisulcate; the anterior ones showing also a 
