318 bulletin: museum of comparative zoology. 



Anterior border of clypeus with fine long hairs; funiculus and ventral sur- 

 face of gaster with sparse and fine pubescence, the rest without pile or pubes- 

 cence. 



Gaster jet black; the rest snowy white or faintly tinged with yellowish brown . 



San Cristoval: Pamua. 



A striking though minute species, very different from any of the 

 species known to me. The color of gaster is in strong contrast to the 

 rest of the body and the long epinotal spines are very distinctive. 



Crematogaster subgenus Rhachiocrema, subgen. nov. 



In Crematogaster paradoxa Emery from New Guinea and the fol- 

 lowing new species, the enormous development of the epinotal spines 

 and the elongate pedunculate structure of the petiole and the elongate 

 12-jointed antennae with the 2-jointed funicular club, are so different 

 from other species in the genus that I separate them from Cremato- 

 gaster sens, strict, as a new subgenus. 



The type of the subgenus is : — 



46. Crematogaster (Rhachiocrema) wheeleri, sp. nov. 



Worker. Length 2.50 mm. 



Head with moderately convex sides, broadly rounded occipital corners and 

 nearly straight border. Mandibular blades with three stout triangular teeth 

 on apical half. Clypeus convex; anterior border straight. Antennae slender, 



Fig. 21. — Crematogaster (Rhaciocrema) wheeleri Mann. Worker. Lateral view of 

 head, thorax, and petiole. 



their scapes surpassing occipital corners; first funicular joint as long as the 

 succeeding two together; joints two to eight distinctly longer than broad; 

 club 2-jointed, slender, terminal joint twice as long as the penultimate. Eyes 



