RHINOCRICUS. 61 
i. Transverse sulcus, at least on anterior fourth of body, conspicuously 
pitted at least as high up as the pore. 
k. Transverse sulcus obsolescent above the pores; only pitted up 
to the pores in the anterior fourth of the body; olive-black . smithi, sp. n. 
k', Transverse sulcus strong and complete dorsally, pitted through- 
out in the anterior half of the body; segments transversely 
banded with red or yellow . . . . «1 e ww ee .) «Gurocinctus, sp. 2. 
?. Transverse sulci not pitted. 
J. Elliptical area of scobinze small, narrower than striate area, and 
separated from the anterior edge of the segments by a space 
exceeding their transverse diameter in length; median and 
posterior area of segments smooth and polished . . . . .  stollt, sp. n. 
I’, Elliptical area of scobine large, as wide as the striate area and 
close to the anterior border of the terga; at least the median 
area of the terga coriaceous. 
m. First tergal plate encircled with yellow; tergal plate and 
valves of anal segment bordered behind with yellow . . . atoyacus, sp. n. 
m', First tergal plate, and tergal plate and valves, not bordered 
with yellow . 2 2 2 ee we ew ew ee ew ee «Salleanus, sp. n. 
1. Rhinocricus rogersi, sp.n. (Tab. V. figg. 12, 12a, b.) 
Colour (in alcohol) rich olive-green, obscurely banded transversely, the segments ferruginous or yellowish-red 
beneath ; legs yellowish ; antenne pale olive-green banded with yellow. 
Head smooth, shining ; sulcus mesially obsolete ; eyes consisting of five transverse rows of about thirty ocelli, 
separated by a space equalling at least four diameters. Antenne slightly shorter than the uncovered 
portion of the head, distally attenuate; sixth segment nearly as long as wide, narrower than the fifth 
but not longer; seventh much narrower than fifth or sixth. Segments smooth, shining, feebly striolate ; 
the first with a short inferior lateral groove, its anterior border projecting just below the level of the 
eyes, obliquely cut away inferiorly, so that its lateral border is not so evenly and widely rounded as in 
the other species. Second segment not striate laterally below; posterior portion of its infero-lateral 
edge projecting convexly below the level of the anterior portion, striolate ; posterior portion longitudinally 
grooved for a short distance inferiorly. Transverse sulcus strong laterally, extending over the dorsum as 
a shallow groove on all the segments except the anterior and posterior four or five, on which it is obsolete. 
Longitudinal groove behind pore very weak. Scobinew feebly developed, visible from the seventh or 
eighth to the fifteenth or sixteenth segments; the two transversely oval, quite close to the anterior 
edge of the segments, separated by a space equalling at least six times their transverse diameter, the 
‘striate area triangular. Anal segment: tergite scarcely covering summit of valves, the process rectangular. 
Valves with margins compressed, prominently convex; sternite triangular, its angle obtusely rounded. 
Copulatory feet and phallopods of male as in figures (Tab. V. figg. 12a, 6). Number of segments 43-44, 
Length about 80 millim.; greatest width 8; width at anterior end 7, width at posterior end of penultimate 
segment 6°5 millim. 
Hab. Costa Rica (Rogers), 
This species is remarkable for the feeble development of the scobina and for the more 
angular shape of the lateral portion of the first tergal plate. 
