Pheidole caflra subspecies senilifrons ^HNS, new subspecies

Text Figure 32

Soldier.-Length 4 mm. Differing from the typical form and the subspecies bayeri ^HNS in the sculpture of the head, the sharp longitudinal rugae between the prolonged frontal carinae being surrounded by the rugae from the sides of the head, which run up to the posterior corners, then turn at a right angle and run transversely on the occipital lobes to the occipital furrow. These rugae are quite as strong as those on the front, but denser. The head is a little longer and a little more depressed posteriorly than in the variety thysvillensis ^HNS, the transverse welt of the mesonotum less pronounced; the blunt epinotal spines distinctly shorter. The sculpture of the thorax and pedicel and the color and pilosity are much as in that variety.

Worker.-Length 1.8 mm. Very similar to the worker thysvillensis ^HNS but the pronotum is smooth and shining and the epinotal spines are shorter, less obtuse, and more erect.

Four soldiers and a single worker from Yakuhiku, where they were found "nesting in a small mushroom-shaped termitarium" (Lang and Chapin).