28 



THE AEGENTIISrE ANT. 



soepinotal conptriotion 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. 



FiO. fi.— The Argentine ant, adult forms: o, Adult male; at, head of male; aS, petiole of male; b, worker; 

 bl, head of worker; b2, i)etiole of worker; c, fertile queen; ct, 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 mandil)l<'S', clypeus, tip and lower 

 surface of the gaster. Pubescence short and uniform, grayish, so that the body has a 

 slightly pruinose appearance. 



