286 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4tH Serr. 
the posterior corners of the head. The color is pale ivory 
yellow, the gaster, coxz and legs whitish, the head and thorax 
are immaculate and the bands and their mid-dorsal expansion 
on the gastric segments are narrow and so very faint as to be 
scarcely discernible. The knees, mandibles and tarsi are 
brownish yellow. 
Worker minor. Length 5—6 mm. 
Resembling the worker major but even slightly paler in 
color, almost white. The clypeus is as broad as long and 
distinctly carinate. ‘The antennal scapes extend about one- 
third their length beyond the posterior corners of the head. 
The mandibles are scarcely darker than the head, with red- 
dish teeth. 
Described from five major and five minor workers taken by 
Dr. Williams in November, 1905, on Hood Island ‘under 
stones’. This variety is readily distinguished by its very pale 
color. 
Cotypes, 6 specimens, No. 454, Museum California Acad- 
emy of Sciences, and four specimens in author’s collection. 
26. Camponotus (Myrmamblys) macilentus narboroénsis, | 
new variety. 
Female. Length of head and thorax 4 mm. 
Head but little longer than broad and nearly as broad in 
front as behind. Clypeus a little broader in front than behind. 
The color is reddish yellow, the pleurze, coxeze and femora pale 
yellow, the tibiz, tarsi and antennz more reddish, the mandi- 
bles scarcely darker than the head. Wings with a distinct 
yellowish tinge. The gaster and petiole are missing. 
A single, greasy and defective specimen taken by the 
“Albatross” in 1899 (U. S. Nat. Mus.). More and better 
material will be required to establish the status of this form, 
which seems to represent a distinct color variety. 
27. Camponotus (Myrmamblys) macilentus bindloénsis, 
new variety. 
Worker major. Length about 8 mm. 
Head large and rather broad, with distinctly rounded sides, 
slightly narrowed in front; cheeks without transverse impres- 
