518 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
pronotum. The pubescence on the gaster is usually somewhat 
denser and more silvery so that it has a grayish or glaucous tinge, 
somewhat as in the var. glauca. 
FEMALE. Length 10-11 mm. 
Indistinguishable from paler colored females of the typical form. 
Hairs, especially on the thorax, much more abundant than in the 
worker. 
TYPE LOCALITY.— California: Palo Alto, (H. Heath and W. M. 
Mann). 
California: Pasadena, San Ysidro near Santa Barbara, Palmer’s 
Canyon, San Gabriel Mountains (Wheeler); Mount Wilson, Three 
Rivers, Sissons, Berkeley, Wild Cat Canyon near San Pablo, Lemon 
Cove, Tulare County (J. C. Bradley); Los Angeles (F. Grinnell, Jr.); 
San José (H. Heath); Santa Cruz Island (R. V. Chamberlin). 
Washington: Wawawai (W. M. Mann). 
The specimens from Washington have somewhat smoother bodies, 
the hairs are completely absent on the thorax in all specimens and this 
region is spotted with black and the black of the posterior part of the 
head runs under onto the posterior part of the gula, so that these speci- 
mens may, perhaps, represent a distinct variety. 
The habits of the Californian form are very similar to those of the 
European type. It is fierce and aggressive and nests under stones 
in the open live-oak groves on the warm slopes of the Coast Range, 
at rather low altitudes. 
102. F. RUFIBARBIS var. GNAVA Buckley. 
F. gnava Buckley, Proc. Ent. soc. Phil., 1866, 6, p. 156, 8 @ o; Dalla Torre, 
Catalog. Hymen., 1893, 7, p. 199. 
F. fusca var. gnava Wheeler, Trans. Tex. acad. sci., 1902, 4, p. 19; Bull. Amer. 
mus. nat. hist., 1906, 22, p. 344; Ants, 1910, p. 570. 
F. fusca var. subsericeo-neorufibarbis (Emery) Wheeler, Trans. Tex. acad. 
sci., 1902, 4, p. 19. 
WorkErR. Length 3.5-6 mm. 
Differing from the preceding variety and the typical form in its 
average smaller size and in the more finely shagreened and therefore 
more shining surface of the body. Frontal area opaque. The head 
and gaster, especially, are more shining than in any of the other varie- 
ties of rufibarbis. This is due in part to the finer and shorter pubes- 
cence. The head, thorax, petiole, and legs vary from light to dark 
brownish red or brown, with the top of the head and often also the pro- 
