1914] W heeler—Harvesting Ants 155 
Arizona: Yuma, Yucca, Tucson and Phoenix (Wheeler); Nogales (Oslar); Flor- 
ence. 
This subspecies is very abundant in the hot deserts of California 
and Arizona, but according to my observations it nests only in 
pure sand. 
5. Pogonomyrmex californicus Buckley subsp. longinodis Emery. 
I fail to find this form among the large amount of material I 
have collected, and am inclined to believe that it must be either 
very rare or local. It was described by Emery as follows from 
specimens taken in the Colorado Desert of California and received 
from Pergande: “‘The worker differs from that of P. californicus 
in its more slender pedicel, the second joint of which [7.e. the post- 
petiole] is not as high as long; the peduncle of the first joint (peti- 
ole] is shorter than the very long and anteriorly pointed node. 
Sculpture feebler than in californicus; pedicel merely finely punc- 
tate, without rugz. Color rather light red, abdomen, with the 
exception of the pedicel and its base, brown.”’ 
6. Pogonomyrmex californicus Buckley subsp. maricopa subsp. nov. 
The worker of this form measures 6—7.5 mm. and therefore averages larger than 
the typical californicus from which it differs in the shape of the petiole and in sculp- 
ture. The node of the petiole is less pointed above, its anterior surface is straight 
and forms an obtuse angle with the upper surface of the peduncle, and there is often 
a distinct anteroventral tooth. The petiole is fully as long as high. The ruge 
of the head and thorax are much less prominent and the spaces between them are 
filled densely with very distinct punctures, clearly visible under a magnification of 
- 20 diameters. The surface of the head and thorax are decidedly subopaque and 
not shining as in the typical californicus. The nodes of the petiole and postpetiole 
are also more coarsely shagreened and less shining. The color is the same. 
A single deiilated female from Rincon, New Mexico, measures 8 mm. and closely 
resembles the female of the typical form in sculpture, the rugze of the head and 
thorax being sharp, the interrugal punctures rather indistinct. 
New Mexico: Alamogordo, type locality (G. von Krockow); Prescott and Albu- 
querque (Wheeler); Roswell, Deming and El Rincon (T. D. A. Cockerell); Las 
‘Truches (Miss Lillie Gerhardt); Engle (Miss Nora Newberry.) 
Arizona: Yuma, Tucson, Benson and Grand Canyon (Wheeler). 
California: Needles (Wheeler). 
Texas: Marfa (Wheeler); Barton (J. C. Crawford); Victoria (J. D. Mitchell); 
Chisos Mts., 4600 ft. (W. B. Phillips). 
Mexico: Ojos del Diablo and Ojos de San Dijuela in Chihuahua (C. H. T. Town- 
send). 
As shown by this list of localities, maricopa ranges much further 
