378 



bulletin: museum of comparative zoology. 



Pronotum broader than long, broadest behind middle, margined at sides; 



hmneral spines flat, acute at tips, divergent, and pointing slightly upward. 



Mesoepinotum broadest in front, sides margined, converging to base of spines, 



surface between spines shaUowly concave, in front nearly flat. Spines flat- 

 tened and margined basally, slender api- 

 cally and acute at tips, a little longer than 

 their distance apart at base, moderately 

 divergent and extending slightly upward. 

 Petiole nearly flat, about the anterior 

 border truncate; posterior border feebly 

 rounded and slightly elevated and sub- 

 gibbous at middle; spines slender, parallel 

 with sides of gaster, slightly longer than 

 their distance apart at base. 



Moderately shining. Mandibles densely 

 striate. 



Head and pronotum densely rugulose- 

 striate the latter more coarsely and with 

 the striae more regular. Mesoepinotum 

 broadly and shallowly and reticulately 

 striate, petiole and first gastric segment 

 densely punctate. 



Front and vertex with paired, erect setae. 

 Head and pronotum with rather thin 

 pubescence and mesoepinotum, petiole, 

 and first gastric segment with thicker 

 very fine pubescence, silvery except on 

 gaster where it is golden. 



Black; appendages dark brownish red. 



Fig. 48. — Polyrhachis (Hedomyr- 

 ma) annae Mann. Worker. 

 Thorax and petiole from above. 



Santa Cruz: Graciosa Bay (Type-locality). San Cristoval: 

 Pamua, Wainoni Bay. Three Sisters: Malapaina. 



Described from workers in a colony that rested in earth among the 

 suckers of an epiphyte and others taken on leaves and tree-trunks. 

 Type.— M. C. Z. 9,193. 



This species is common and widely distributed, but the colonies 

 nest usually high in trees and are difficult to find. 



111. Polyrhachis (Myrmothrinax) dahli Forel. 

 Mitt. Zool. mus. Beriin, 1901, 2, heft'l, p. 30, ^ . 



San Cristoval: Wainoni Bay. Three Sisters: Malapaina. Mal- 

 aita: Auki. Florida: Tulagi. 



