406 Bulletin American Museum of Natural History. [Vol. XXXIV, 
Described from thirteen soldiers and ten workers taken in the dry desert 
near Tucson, Arizona. 
25. Pheidole californica Mayr. 
_ Considerable series of this ant collected in various localities in California 
enable me to state that Emery’s account of its characters and of those of 
his oregonica needs revision. He states that the transverse ruge on the 
back of the head of the soldier of californica pass over on the sides into the 
longitudinal rugee (of the cheeks), but this is not implied in Mayr’s descrip- 
tion, it is not the case in a typical specimen of californica which Emery 
kindly sent me many years ago nor is this condition apparent in any of the 
numerous specimens I have since seen. 
The soldier of the species measures 2.3-2.5 mm. and may be readily recognized 
by the following characters: The head is decidedly longer than broad, a little broader 
behind than in front, with feebly convex sides, flattened above and below, with its 
greatest dorsoventral diameter through the eyes, the posterior orbits of which are at 
the anterior third of the head. The transverse occipital rugee are coarse and reticu- 
late as Mayr states, and terminate on the posterior corners. The anterior third of 
the head is strongly, longitudinally rugose and between this sculptured region and the 
posterior ruge the surface is very shining and sparsely and coarsely punctate. The 
thorax is densely punctate and shagreened and subopaque, with the exception of the 
_ pro-mesonotal convexity, which is smooth and:shining. The postpetiole is, as stated 
by Emery, trapezoidal, broadest through its anterior corners, which are rounded. 
Specimens of the typical coloration are rufo-testaceous, with the legs yellow and the 
gaster somewhat infuscated. The hairs are yellowish, rather long and abundant, 
of uneven length on the body, suberect on the body and scapes, short and subap- 
pressed on the legs. 
The worker measures 1.6—2 mm., has the head very smooth and shining, the thorax 
sculptured as in the soldier, the postpetiole small and subglobular, the epinotal spines . 
small, as long as broad at the base. Pilosity similar to that of the soldier but Sparser. 
Coloration rufotestaceous, upper surface of head and gaster dark brown; legs, clypeus, 
mandibles and antenne yellow. 
The female (dealated) measures nearly 4 mm. 
Head about as broad as long, subrectangular with straight sides and broadly 
excised posterior border, rather convex above. Antennal scapes reaching to half the 
distance between the eyes and the posterior corners. Thorax as broad as the head, 
oval, narrowed behind, the mesonotum and scutellum very flat. Epinotal spines 
short, triangular, acute. Petiolar node in profile acute, its border seen from behind 
straight, transverse and entire. Postpetiole less than twice as broad as the petiole, 
broader than long, with blunt lateral conules. Gaster elongate elliptical. 
Head longitudinally and coarsely rugose, except the occiput, which is transversely 
rugose and very coarsely punctate. Thorax opaque and densely punctate, except 
the mesonotum and scutellum, which are smooth and shining, with a few sparse 
punctures. Petiole and postpetiole opaque and densely punctate, except the node 
