1895.] Entomology. 1119 
Stemmatoiulus calvus sp. n. 
Plate XLIV, figs. 47-57. 
Body smaller and less fusiform than in St. bellus, but more robust 
than in St. pencillatus ; lateral compression not so strong. 
Segments with the minute longitudinal striations less distinct than on 
St. bellus; the coarser striations less oblique and less distinct ; the pores 
seem to be slightly more dorsal. - 
Second male legs almost without hairs on the two distal joints, which 
are also much more slender than in the two preceeding species. 
Length 3-5 distinctly crassate, but less so than in the other Liberian 
species. 
Copulatory legs of characteristic form, see figures. A notable differ- 
ence is shown in the basal lamina of the anterior face. In both other 
species this is broad and distally emarginate ; in St. calvus it runs out 
into an attenuate process. 
Color: In life this species appears to be banded with black and white 
alternately, as the posterior part of each segment is subhyaline and ap- 
pears white. In alcohol the color is dark horn-brown, nearly black, 
somewhat mottled; median dorsal line very narrow orange, sometimes 
nearly or quite obsolete. A row of lighter horn-brown spots along the 
pores and another similar row at an equal interval below; the dark 
color is not interrupted at the median line of side as in the other species, 
but extends down nearly to the pleural suture. Under surface, legs, 
` and apical joint of antennz whitish. 
Length 22 mm., width 2 mm. ; number of segments, 44-47. 
Locality—A rare species in Western Liberia. Found only in the 
region of the Mangrove Swamps in vicinity of Monrovia; I have 
collected a few specimens on Busbrod Island and along the Mesurado 
River, of which two are mature males. 
A considerable quantity of young specimens were collected, but they 
are difficult of determination and have not been given much study. In 
young individuals of all the species the color is a uniform grayish. I 
have also collected forms congeneric with the Liberian at Sierra Leone 
and at Conakry, French Gambia, but no mature males were secured. 
The drawings of the Liberian species here submitted are supposed to 
show, in addition to the specific characters, the apparent constancy of 
the more fundamental and important features on which the higher 
divisions have been based. On this account figures of the same struct- 
ures have been repeated for each species, even when the specific differ- 
ences were not important.—O. F. Cook. 
