282 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser. 
Head through the very large and convex eyes as broad as 
long, rounded behind, with straight, parallel cheeks. Clypeus 
subrectangular, as broad as long, carinate, with rounded an- 
terior border. Mandibles indistinctly tridentate. Antennze 
very slender, the scapes reaching about one-half their length 
beyond the posterior border of the head. Mesonotum nearly 
circular, as broad as the head through the eyes. Epinotum 
convex and rounded, without distinct base and declivity. 
Node very thick, blunt and low, its border transverse and very 
feebly impressed in the middle. Gaster and legs slender. 
Sculpture and pilosity much as in the minor worker. 
Brownish yellow, legs scarcely paler; ocellar region dark 
brown, gastric segments pale brown, except at their anterior 
and posterior edges. Wings colored as in the female. 
Described from 10 major workers, seven minor workers, 
seven females and a single male taken by Dr. F. X. Williams 
from a single colony on James Island during August, 1906. 
Cotypes, 12 specimens, No. 450, Museum California Acad- 
emy of Sciences, and 12 specimens in author’s collection. 
21. Camponotus (Myrmamblys) macilentus barringtonensis, 
new variety. 
Worker minor. Length 4—5.5 mm. 
Differing from the var. jacobensis in its distinctly paler and 
more ivory-yellow color, the brown clouds on the vertex and 
thorax being paler and less sharply defined or more diffuse, 
so that in some specimens the whole meso- and epinotum is 
pale brownish. The bands on the gaster are narrower, their 
mid-dorsal expansion shorter and the color of these markings, 
though paler than in jacobensis, is nevertheless darker than 
those on the head and thorax. The knees are distinctly 
brownish. 
Female. Length 8—8.5 mm. 
Colored very much like the minor worker, but the bands on 
the gaster are broad and sharply defined and their mid-dorsal 
expansions are broken into spots. 
Twenty-one minor workers and eight females from a single 
colony taken by Dr. Williams on Barrington Island during 
October, 1905. 
