154 Psyche [October 
except their bases and tips, and base of first gastric segment, black; remainder of 
body red, the mandibles and antennz being more brownish, the gaster more yel- 
lowish in tint. Wings colored as in the female. 
No type-locality in California is mentioned in Buckley’s original description. I 
have seen numerous specimens from the following places: 
California: Lakeside, Pasadena and Claremont (Wheeler); Point Loma, near 
San Diego (P. Leonard); San Pedro (T. D. A. Cockerell); Lompoc and Upland 
(J. C. Bradley); San Jacinto; Sierra Valley. 
Arizona: Yuma (Wheeler). 
Nevada: Las Vegas (J. C. Bradley) 
This ant is very common in the sandy canyon bottoms of south- 
ern California. Its nests are flat craters 4-10 inches in diameter, 
with sloping, central or eccentric entrances. The workers are 
agile hunters of insects when these are to be found, but at certain 
seasons of the year large numbers of seeds are collected and stored 
in the nests. The nests in the Arroyo Seco, at Pasadena, Cal., 
were often found covered with the seeds of a common canyon 
shrub (Hriogonum fasciculatum) during the month of December. 
4. Pogonomyrmex californicus Buckley subsp. estebanius Pergande. 
This form, which should be regarded as a subspecies and not as a variety, aver- 
ages a little smaller in all three phases than the typical californicus. In the worker 
the rugze of the head and thorax are decidedly more delicate, but the interrugal 
punctures are quite as indistinct. The anterior surface of the petiolar node is 
more sloping and therefore forms a larger obtuse angle with the upper surface of 
the peduncle, and the node is lower than in the typical form of the species. There 
is also a tendency to develop a tooth on the anteroventral surface of the petiole. 
Typically the gaster is black, with the base of the first segment yellowish red; but 
specimens are sometimes found with only the tip of the gaster black or with a few 
black spots on the first segment, usually near its lateral or posterior borders. The 
nodes are sometimes infuscated; more rarely the whole gaster is black. 
The female varies considerably in size, from 7-9 mm; and the gaster varies greatly 
in color. In most of my specimens it is entirely black, except for a large, bilobed, 
yellowish red spot at the base of the first segment. In others only the lateral and 
posterior margins of this segment are black and often the markings are interrupted 
in the middorsal line. The veins of the wings are pale yellow, but the stigma is 
brown. 
The male measures 6.5-8.5 mm. Its mandibles are narrow, with transverse, 
bidentate, apical borders. Its color resembles that of the typical californicus, ex- 
cept that the gaster is in some specimens entirely red, in others entirely black. In 
some specimens, too, more or less of the anterior portion of the head may be red. 
Lower California; Calmalli Mines, San Esteban, type locality; San Borgia and 
Margarita Island (Eisen and Haines). 
California: Needles (Wheeler); Otis (J. C. Bradley). 
