CHAMBERLIN: CHILOPODS FROM MEXICO AND WEST INDIES. 535 
DELOBIUS SPINIFER, sp. nov. 
Dorsum brown, somewhat dusky; some plates with a paler median 
longitudinal stripe. Head concolorous with dorsum. Antennae 
dusky brown, at very tips paler, yellowish. Prosternum and _pre- 
hensors brown of a somewhat lighter cast; prehensors rufous distally. 
Legs brown, the tarsi, of the posterior pairs in particular, brighter, 
yellowish. 
Body slender, only very gradually narrowed cephalad to the third 
plate which is of same width as the first. Head wider than any of the 
plates. Width of head and of first, third, eighth, tenth, and twelfth 
plates to each other as 56:47 :47:54:54:47. Head wider than 
long in ratio 14:13; widest at marginal breaks. Lateral marginal 
breaks small but distinct, much closer to eyes than to caudal corners. 
Strongly narrowed in front of eyes, the margin between which and 
antennae is somewhat concave; ‘margin near mesal side of antennae 
» on each side more strongly chitinous. The anterior median sulcus 
sharply impressed, not attaining the suture caudad. 
Antennae of medium length. Articles 45-46 in type. Articles dis- 
tad: of the third short and very short. Ultimate article much longer 
than the two preceding ones taken together. 
Ocelli 1 + 3, 3, 2; 1+ 3, 4, 2. Ocelli in type pale and indistinct. 
Single ocellus well separated, largest, but the first one of the upper 
series is nearly as large and is much larger than the others of series of 
which those in bottom row are especially small, smaller than the 
organ of Témésvary in outline. 
Prosternum 1.84 times wider than long. Distance between chiti- 
nous spots 1.84 times width at level of bottom of sinus; 2.2 times the 
; dental line. Teeth 3+ 3, small, the most ectal on each side more 
remote from the median one than the latter is from the most mesal; 
line of apices on each side slightly convex, omitting the median tooth 
on each side the line of apices would be straight. Sinus very wide 
and very shallow, the distance between the teeth at its ends being 
much greater than between adjoining teeth on each side. Spine small 
and bristle like, inserted just ectad of ectal tooth. Margin slanting 
back directly from spine. 
First dorsal plate in type 1.51 times wider than long; sides only 
gently converging caudad, nearly straight cephalad of the rounded 
caudal corners. Posterior angles of the ninth, eleventh, and _thir- 
teenth dorsal plates produced, the processes moderate. 
Porigerous areas of coxae moderately depressed. Pores circular: 
3, 3, 3, 3 or with a small additional pore at proximal end on some of 
the coxae. : 
, 9, 2, 1, 2, 
. . 0/10), 1, 1 sea, G00, Remake 
Spines of first and second legs, §-9-9-9,1' of the third, 5-9-9739: of the 
