WILLIAM MORTON WHEELER 



Ants collected by Prof. F. Silvestri 



in the Hawaiian Islands. 



The following ooUection of ants made by Professor Filippo 

 Silvestri during a sojourn of a fev days in the Hawaiian Islands 

 represents a small but valuable addition to the list of species pub- 

 lished by Forel in the « Fauna Hawaiiensis ». This author e- 

 numerates twenty species of Formicidee from the islands. Profes- 

 sor Silvestri has discovered an interesting new species of Cera- 

 pacJììjs and the ergatomorphic males of Ponera perkinsi ForeL 

 Hitherto such males have been found in only a few of the nu- 

 merous species of Ponera (P. ergatandia Forel, P. eduardi Fo- 

 rel, punctathsima Roger, and ragusai Emery). 



1. — Cerapachys (Syscia) silvestrii sp. no v. 



Worker. Length 2,5 mm. 



Head longer than broad, nearly as broad in front as behind, 

 with feebly convex sides, not very acute anterior and posterior 

 angles and broadly concave posterior border. Eyes absent. Man- 

 dibles acute, with several subequal denticles. Frontal carinse ap- 

 proximated, erect, subparallel , slightly diverging behind, and in 

 front surrounding the antennal fovese but not joining the short, 

 straight , longitudinal ridges on the ckeeks. Clypeus very short, 

 with straight anterior border. Antennae 9-jointed , robust ; scape 

 incrassated distally , reaching about half way between the ante- 

 rior and posterior corners of the head: first funicular joint about 

 as long as broad, joints 2-8 decidedly broader than long , termi- 

 nal joint large, glandiform, as long as the seven preceding joints 



