MANN: ANTS OF THE BRITISH SOLOMON ISLANDS. 



377 



posterior corners of head. Pronotum narrowly margined at sides, one and 

 one third times broader than long, broadest behind; sides convex at posterior 

 two thirds, in front concave; humeri developed as broad, lamellate lobes with 

 elevated margins, apically concave and bidentate, 

 the outer tooth elongate and spinose, the inner 

 one rounded at tip. Mesoepinotum without 

 suture or constriction, much shorter than pro- 

 notum, flat except between spines where it is 

 concave. Basal and declivous portions of epino- 

 tum rounding into each other; declivity much 

 longer than base. Epinotal spines less than 

 twice as long as their distance apart at base, 

 stout, rather strongly curved downward. Petiolar 

 node in profile with anterior and posterior sur- 

 faces subparallel; dorsal surface slightly convex, 

 less than twice as broad as long, separated from 

 posterior surface by an obtuse margin; spines a 

 little shorter than their distance apart at base, 

 stout, arcuate. 



Sublucid. Mandibles finely striate. Clypeus 

 with fine oblique striae. Head, thorax, and 

 epinotum with regular, slightly rugose striae, 

 which are longitudinal except on sides of prono- 

 tum where they are oblique. Petiolar node finely 

 striate. Gaster densely and rather coarsely and 

 rugosely striate longitudinally. Legs and antennae finely punctate. 



Erect hairs coarse, very sparse on head and apical portion of gaster. 

 and body, with sparse, recumbent pubescence. 



Black throughout. 



Fig. 47. — Polyrhachis (Hedo- 

 myrma) geminatus Mann. 

 Worker. Thorax and 



petiole from above. 



Head 



Florida: Maliali. 

 Described from a unique worker. 



The species is distinguished by the short, upturned, and bifurcate 

 humeral spines, and the strong sculpture of the gaster. 



110. Polyrhachis (Hedomyrma) annae, sp. nov. 



Worker. Length 4.5-5 mm. 



Head distinctly longer than broad, evenly rounded behind, sides in front 

 of eyes nearly straight, somewhat convergent. Clypeus evenly and moderately 

 convex, the anterior border bidentate and shallowly concave at middle. 

 Frontal carinae only slighty divergent, extending to opposite middle of eyes. 

 Scapes surpassing occipital border by more than two thirds of their length. 



