WHEELER. 



[VOL. II. 



a 



probably at intervals of a few days or a week. It is quite 

 possible that some of the workers, acting as ergatoid females, 

 may contribute unfertilized eggs which give rise to the males 

 that are found in nearly every colony late in August. 



The larva (Fig. 4, a) is clearly of the Ponerine type, though 

 differing in a few important particulars from any of the larvae 



of the five genera 

 (Leptogenys, Pachy- 

 condyla, P o n e ra, 

 OdontomacJms, and 

 Diet cam in a] de- 

 scribed by Emery 1 

 and myself. 2 It is 

 rather robust, with 

 a large head suc- 

 ceeded by five dis- 

 tinct segments. The 

 remaining segments, 

 forming the swollen 

 abdomen, are not 

 distinctly marked 

 off from one another. 

 The body is fur- 

 nished with out- 



FIG. 4. a, larva of Poneracoarctata Latr.,subsp. pennsylvanica , 



Buckl. Nearly ready to pupate. 6, bristle-capped tubercle of gTOWthS OI . il TCC 

 same; c, head of same (dorsal aspect). different tVDCS The 



first of these is represented by a number of pointed bristles 

 confined to the ventral surface of each segment. The 

 second type is represented by several longitudinal rows 

 of pointed tubercles, each of which, under a high magni- 

 fication (Fig. 4, b) is seen to consist of a short distal spine and 

 a long, tapering proximal base, directly continuous with the 

 integument of the larva, and covered with transverse rows of 

 serrated points. The distal spine is movably articulated with 

 the proximal portion, and is so easily detached that it may be 



1 " Intorno alle I.arve di Alcune Formiche," Mem. letta alia A'. Accad. delle 

 Scienze dell' Istititto di Bologna. Pp. i-io, 2 Tav. 7 Maggio, 1899. 



2 Loc. cit., pp. i 5-22. 



