192 
Psyche 
[December 
suberect or appressed. Antennal scapes with numerous, 
very fine, appressed hairs; those on the funiculi longer, 
stouter and suberect except on the four terminal joints 
where the erect hairs are replaced by pubescence. 
Color : head, thorax and petiolar nodes rich reddish brown 
to yellowish brown ; the mandibles, legs and abdomen brown- 
ish yellow to clear yellow. 
Described from a series of ninety workers taken in Ram- 
sey Canyon, Huachuca Mountains, Arizona, at an elevation 
of 7000 feet. 
Types in my collection and in the collection of Dr. W. M. 
Wheeler. 
There can be little doubt that huachucana is closely re- 
lated to texana, particularly to the variety furvescens 
Wheeler. Despite the fact that furvescens was originally 
described from material taken in Ramsey and Miller Can- 
yons in the Huachuca Mountains I have no hesitancy in re- 
garding huachucana as a distinct species since the struc- 
tural peculiarities which it shows are reinforced by pro- 
nounced ecological differences. On the basis of structure 
the most obvious difference in the two species lies in the 
greater size of the new form (4.5-7 mm. in huachucana, 
4-5.5 mm. in furvescens) . In addition the head of huachu- 
cana is of a different shape. This is due largely to the fact 
that the sides in the narrowed posterior third are less con- 
vex, the occipital border narrower and the flange which 
borders the latter more pronounced in the new species. The 
antennal scapes in huachucana are notably longer than those 
of furvescens and are strongly spatulate at the base, a fea- 
ture not present in the scape of the latter form. In the 
thorax of huachucana the anterior half of the mesonotum is 
more sharply set off from the adjacent portions of the tho- 
rax, particularly behind where there is a definite descending 
posterior face not found in the thorax of furvescens. The 
character of the epinotal spines is quite different in the two 
forms. In huachucana these are short and very broad at 
the base so that they are more aptly regarded as angular 
