chamberlin: chilopods from Mexico and west indies. 541 



series; e. g., 1 + 3, 4, 4, 4; 1 + 4, 4, 4, 2; 1 + 4, 4, 3, 2; 1 + 4, 

 6, 6, 5, 4; 1 + 4, 4, 3. Single ocellus largest, contiguous with the 

 others. First ocellus of uppermost series next in size to the single 

 one; the others irregularly decreasing cephalad and ventrad. Ocelli 

 deeply pigmented and commonly not clearly limited from each other, 

 but those of the most ventral row sometimes pale. 



Prosternal teeth small, nodular, inserted a little proximad of an- 

 terior edge, those of each side well separated. Anterior edge well 

 chitinized, the two side portions meeting at middle in a very obtuse 

 reentrant angle, the angle being but little less than 180°, with no true 

 sinus. Spine on each side inserted at ectal end of anterior chitinous 

 edge; large and stout, greatly exceeding the teeth in size. Edge 

 outside each spine running at first but little caudad of directly ectad 

 and then near middle of its length bending abruptly back more caudad 

 to the prehensors; 1.7-1.77 times wider than long. Distance be- 

 tween chitinous spots 1.77-1.9 times greater than width at level of 

 bottom of median reentrant angle; near 4.75 times the dental line. 



First dorsal plate moderately narrowed caudad; 1.66 + times 

 wider than long. Major dorsal plates with two submedian longi- 

 tudinal furrows which are more deeply impressed on caudal plates. 

 Posterior angles of eleventh and thirteenth dorsal plates strongly 

 produced caudad, those of the ninth more weakly so. 



Coxal pores small, circular, 3, 4, 4, 4; 3, 4, 4, 3; 4, 4, 4, 3; 4, 5, 4, 4, 



Claw of female gonopods of moderate length; acute and well 

 curved. Basal spines stout, conically acuminate, more strongly 

 narrowing distally than proximally. Mesal edge of first article sharp, 

 well chitinized, bending ectad proximally, constricted or furrowed 

 across base. 



Posterior legs of male without special lobes or modifications; slender, 

 spines of first legs, q'q /g' '!' ^^ ^^® second to eleventh, ^ ' ^'^'g'^ ; of the 

 twelfth, p'p'g'g'^ ; of the thirteenth, ^' ^' ^ ^ 2 ', of the penult, ^' ^ 3' 3' ^ 

 or dorsal spines rarely 1, 0, 3, 1, 1, claws 3; of the anal, q' "' 3' ^' ^ or the 

 ventral spines 0, 1, 3, 2, 1, and in one specimen observed as 0, 1, 3, 3, 1, 

 claws 2, the accessory one large and distinct. Last two pairs of coxae 

 laterally armed. 



Length 13-18 mm. 



Localities. — Mexico: Hidalgo; Guerrero Mills (type locahty); 

 P:1 Chico (W, M. Mann). Type, M. C. Z. 1736; three specimens. 

 Type and Paratypes. M. C. Z. 1735, and M. C. Z. 1734. 



