28 
THE AEGENTIKB ANT. 
soepinotal constriction rather deep, extending obliquely downward and backward on 
each side. Epinotum short, nearly twice as high as long, convex on the sides, with 
a short convex base, and a longer, flatter and more sloping declivity. Petiole small, 
less than half as broad as the epinotum; its scale in profile, compressed, cuneate, 
inclined forward, with flattened anterior and posterior surfaces and rather acute apex; 
seen from behind its border is entire and evenly rounded or even slightly produced 
upward in the middle. Gaster small. Legs rather slender. 
Fro. G.— The Argentine ant, adult forms: a, Adult male; al, head of male; a.2, petiole of male; b, worker; 
bl, head of worker; b2, petiole of worker; c, fertile queen; cl, head of queen: c2, petiole of queen. All 
greatly enlarged. (Senior author's illustration.) 
Body minutely shagreened or coriaceous, subopaque and glossy; mandibles, clypeus 
and anterior border of the head more shining. Mandibles minutely and rather ob- 
scurely punctate. 
Hairs few, suberect, yellowish, confined to the mandibles, clypeus, tip and lower 
surface of the gaster. Pubescence short and uniform, grayish, so that the body has a 
slightly pruinose appearance. 
