396 Bulletin American Museum of Natural History.  [Vol. XXXIV, 
the body is blackish red, with the mandibles and the anterior half or two 
thirds of the head light red, the legs dark red or with the femora infuscated. 
Small workers are black or very dark red, with the anterior part of the head 
paler. 
The female measures 6-7 mm. The head is intermediate in size and 
shape between that of the female sevssima and geminata, the antennal 
scapes are also intermediate in length and the punctures on its upper surface 
are smaller than in geminata but more distinct than in sevssema. The 
mandibles have the same curvature as in the latter form. The coloration 
is that of the largest workers. 
In the male the head is mare opaque and puhatale as In the true gemi- 
nata, and not so smooth as in sevissyma, and the thorax has three broad, 
longitudinal red stripes. ? 
I have seen large series of this ant from many localities in Central and 
Western Texas (Austin, Fort Davis, etc.), from Arizona (Phoenix, Hua- 
chuca Mts.) and Mexico (Guadalajara). 
14. Solenopsis geminata maniosa subsp. nov. 
Smaller than the other forms of geminata in all three phases, the worker 
measuring only 1.8-4.5 mm., the female 5-6 mm., the male 4-5 mm. The 
head of the largest worker is less rectangular and more rounded, owing to its 
distinctly more convex sides, the color is a rich light reddish yellow, with the 
posterior half of the gaster black and the borders of the gastric segments 
yellowish. The head, thorax and pedicel of the smallest workers are 
scarcely darker, with nearly the whole of the gaster black or dark brown. 
In the female the head is rather rectangular, with straight posterior 
border, the mandibles are gradually curved, the antennal scapes reaching. 
nearly to the posterior corners. The color is rich yellowish red, the mesono- 
tum, except its middle line and the scutellum, brownish. In some specimens 
the whole gaster is black, with only the extreme base red, in others it is red 
with a broad black band across each segment. These bands are sometimes 
connected by a longitudinal middorsal stripe of the same color. 
This is the common and perhaps the only form of geminata in Southern 
California. I have taken it in large colonies under stones and in diffuse 
and irregular crater nests in dry deserts and arroyos in the following 
localities; San Ysidro, near Santa Barbara (type locality), Pasadena, 
Claremont, La Jolla, San Diego, and Needles, and have received specimens 
from Los Gatos, Mt. Diablo Range (J. C. Bradley), Whittier (H. L. Quayle), 
Visalia (Culbertson), Jacinto Barranca, Fresno County (J. C. Bradley), 
