CHAMBERLIN: CHILOPODS FROM MEXICO AND WEST INDIES. 541 
Bettess 2. g., 1+ 3, 4, 4,4; 14 4,4, 4,2; 1+ 4, 4,3, 2; 144 
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, Pore of the eee to eleventh, > ees 3 3 of the 
0, 0, 3, 2, 2. 3,2, 2 0, 3, 2, 1 
twelfth, 0-0,3,3-3) of the thirteenth, + TET of the penult, ‘eae ee 
or dorsal spines rarely 1, 0, 3, 1, 1, claws 3; of the anal, rT et ; } 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. 
Locatities.— Mexico: Hidalgo; Guerrero Mills (type locality); 
El Chico (W, M. Mann). Typr, M. C. Z. 1736; three specimens, 
Type and Paratypes. M. C. Z. 1735, and M. C. Z. 1734. 
