518 bulletin: museum of comparative zoology. 



pronotum. The pubescence on the gaster is usually somewhat 

 densei' 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 Jose (H. Heath); Santa Cruz Island (R. V. Chamberlin). 



Washington: W'awawai (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 tb.e 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. rufibarbls var. gnava Buckley. 



F. gnava Buckley, Proc. Ent. soc. Phil., 1866, 6, p. 156, ^ 9 cT; 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. 



Worker. Length 3.5-G 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 Tufibarhis. 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- 



