718 THE AMERICAN NATURALIST. (Vor. XXXV. 
female presents very nearly the normal shape of queen ants 
and possesses wings. After fecundation, however, owing to an 
extraordinary development of the ovaries, her abdomen takes 
on the appearance. of a sphere 4 mm. in diameter (Fig. 19, b), 
on which are seen in the form of little plates, isolated by the 
distention of the articular membranes, the strongly chitinized 
rings which constitute the whole external surface of the abdo- 
men in the young individual (Fig. 19, c). The male (Fig. 19, a) 
is apterous, and its abdomen is strongly curved downwards. 
He has a dawdling gait. The strigil is well developed in the 
Fic. 19. — Anergates atratulus Schenck. a., male (after Adlerz) ; 4., fertile female (after Forel); 
¢., abdomen of virgin female (after Adlerz). 
female, while in the male it is very small, but nevertheless 
pectiniform in certain specimens (Switzerland, Forel), although 
in others it lacks the teeth and is quite rudimental or even 
almost obsolete (Sweden, Adlerz; Holland, Wasmann ; Beau- 
vais, Janet). 
In some young male specimens collected at Beau 
preserved in alcohol, I observed by transmitted light, in the 
head, near the eyes, and of about the same size as these, the 
two mandibular glands and their excretory ducts opening at 
the base of the mandibles. These glands are therefore well 
developed, notwithstanding the fact that the mandibles, which 
are rounded at their tips, are much reduced. The male an 
female are both provided with well-developed ocelli. The 
antennz are rr-jointed in both sexes. 
vais and 
