ORTHOPORUS. 97 
La Palma at an altitude of 1600 metres, induce me to regard them as specifically and 
not as subspecifically distinct. 
Number of segments 51-57. Length from about 70 or less to 97 millim., average 
width from about 5°5-6°5 millim. 
In Mr. Godman’s collection there are a number of female specimens I refer to this 
species, taken in Costa Rica by Rogers, and also others found at La Palma by Tristan 
and Biolley. 
3. Orthoporus chiriquensis, sp. n. (Tab. VIII. fig. 2.) 
3. Colour (in alcohol) olivaceous with ferruginous posterior borders to the segments; legs and antenne 
ferruginous or ochraceous. 
Head and first tergal plate smooth. Inferior portion of the first plate abruptly incurved almost at right 
angles to the outer surface and marked with four ridges, the upper of which is strong and cariniform, 
and ends posteriorly in a rounded tuberculiform enlargement ; the anterior angle rectangularly acute; the 
posterior angle also rectangularly rounded. Inferior edge of exposed segment of mandible lightly 
emarginate. The lateral ridges in the succeeding segments thick. The posterior area of the segments 
finely and closely punctured and substriolate and the adjoining area of the anterior portion in front of the 
transverse groove similarly punctured, so that these areas are not sharply demarcated by the nature 
of the sculpturing. Pores beginning on the fifth segment. Tergal plate of anal segment short, longi- 
tudinally convex above; not covering the summit of the valves, which have prominent, compressed 
margins, 
Anterior lamina of coleopod long, its inferior edge quadrate; posterior lamina with its inferior portion antero- 
posteriorly compressed, forming a somewhat crescentic lamina which runs externally into a longish 
slender spiniform process, 
Number of segments 57-60. 
Length 85 millim., width 5°5. 
Ilab. Panama, Volcan de Chiriqui (Champion), 
In many characters, especially in the abrupt incurvature and the thickness of the 
upper crest of the inferior portion of the first tergal plate, this species resembles 
O. typotopyge of Brdlemann. ‘The specimens of it, however, that I have seen differ 
from the one example here referred to O. typotopyge in being more coarsely punctured 
and in having the whole anal segment shorter, the tergal plate being more convex 
above, the depression less marked, and the caudal area behind it much less prominent 
and tuberculiform. | 
Especially does 0. chiriquensis differ from O. typotopyge in the form of the inferior 
portion of the posterior lamina of the coleopod, which is crescentic and produced into 
a long and slender spine. 
4. Orthoporus teapensis, sp. n. (Tab. VIII. fig. 4.) 
3. Colour (in alcohol) banded black and ferruginous; legs and antennex yellowish. 
Head and first tergal plate nearly smooth. ‘The first tergal plate, however, distinctly rugose in its postero- 
lateral portions, its inferior area inflected and marked with about four ridges, the upper of which ends 
posteriorly in a strong cariniform tubercle; the anterior angle of this plate rectangular, the posterior 
obtusely rounded. Inferior edge of basal segment of mandible emarginate, the posterior lobe of the 
emargination acute but not much produced. Ridges on the segments immediately following the first 
thick, nearly as wide as the intervening spaces. The posterior area of the segments rugulose, very closely 
BIOL. CENTR.-AMER., Diplop., April 1909. ) 
