16 
Psyche 
[March 
trichome of short, curved, golden hairs distinct from the 
other more scattered hairs on the thorax. Hairs absent on 
the gula, occiput, antennal scapes, thoracic pleurae, and 
most of the dorsum of the first two gastric segments. All 
hairs are golden yellow, coarse, irregular in length, and 
blunt but not spatulate. A few, short scattered hairs occur 
on the eyes. Pubescence dilute. 
Color of head, most of thorax, petiole, base of gaster, and 
the legs ferruginous red, mandibles darker red. Ocellar 
triangle, postscutellum, and metanotum deeply infuscated. 
Gaster infuscated except at base, becoming dark brown to 
black toward the tip. Wings, as far as can be seen from 
the broken basal pieces, straw-colored. 
Gynetype: one dealated female (Queen of a mature 
colony). Collection of R. E. Gregg. 
Direct comparison with eleven females of F. ulkei in the 
collection of the author (three of which retain wings), 
showed that this species may be distinguished from the 
queen of opaciventris by a slightly more quadrate head 
(head index of 1.0), the postscutellum faintly more concave 
in profile, the scale of the petiole more convex along its 
superior border and tapering to a narrower base where it 
attaches to the peduncle, hairs very much longer, more 
abundant and curly on the thorax and petiole, and sculpture 
weak, leaving the head, thorax, and abdomen very shining. 
In color, ulkei shows the posterior one-half to two-thirds 
of the head very dark brown to black, with the anterior 
portion yellowish red, the promesonotal suture darkened, 
longitudinal stripes of infuscation on the scutum, meso- 
pleurae and a spot on the propleurae dark brown, infusca- 
tion of the postscutellum confined to the posterior margin, 
and the gaster concolorous without a basal patch of red. 
Two winged females of exsectoides also available for 
study made possible the following comparisons. The female 
of opaciventris differs from that of exsectoides in having 
distinctly more dilute gastric pubescence, long hairs on 
the anterior margin of the first segment of the gaster and 
on the petiolar scale, shorter but much more numerous 
hairs on the thorax, and hairs on the lower angle of the 
