chamberlin: chilopods from Mexico and west indies. 523 



stout conical black tooth. Femuroid armed toward distal end with a 

 larger stout, distally rounded process or tooth which is less strongly 

 chitinized than that of the claw and is pale like that of Nesidiphilus. 



Prosternum without chitinous lines. Anterior margin with two 

 teeth. 



Ventral pores few; present on the anterior plates in a narrow 

 transverse band in front of the caudal margin. 



Spiracles all circular or the first one a little vertically elongate and 

 much larger than the third one. 



Last ventral plate intermediate in size, varying across the anterior 

 end from slightly wider than long to a little longer than wide; sides 

 strongly converging caudad. 



Tergite of last pediferous segment mostly very broad and almost 

 wholly, concealing the coxopleurae in dorsal view. Not strongly 

 narrowing caudad. As wide as penult tergite to a little narrower 

 with sides more converging; equal in length and breadth to wider 

 than long. 



Coxopleurae moderately inflated, not unusually elongate, not at 

 all exposed at sides of last prescutum. Pores small and numerous; 

 most dense on ventral surface; absent from caudal end and above 

 excepting proximally where they open near and beneath the edge of 

 the tergite and beneath border of prescutum. 



Anal pores present but small. 



Anal legs with six articles distad of coxopleurae. Clawless. 



Genotype. — L. paucipcs, sp. nov. 



Lestophilus paucipes, sp. nov. 



Ochraceous or in some clear yellow caudally. Head darker, of 

 dilute chestnut tinge, darker along sides and in region of the frontal 

 suture. Legs yellow. Prosternum and prehensors dilute chestnut 

 like the head. Venter pale ochraceous to clear yellow. 



Body moderately robust. From the middle region conspicuously 

 narrowing to the caudal end but only very slightly narrowing cephalad. 



Cephalic plate widest at junction of frontal and caudal divisions; 

 semicircularly rounded cephalad and the sides converging caudad; 

 the caudal corners rounded as usual; caudal margin straight or weakly 

 widely incurved. Longer than wide in ratio 7:5. Place of frontal 

 suture taken by a vague, incomplete pale line. Hairs short and very 

 sparse. Basal plate largely overlapped by the cephalic plate; the 

 exposed portion very short, in type being 6.44 times wider than its 

 median length but in some specimens even as much as 13 times 

 wider. 



