MANN: ANTS OF THK UUITISII SOLOMON ISLANDS. 305 



93a. AcROi'YGA (Acroi'Yca) moh'ccana Mayr, \ar. opaca Stitz. 

 Sitzungsb. Gcsellsch. nat. frouiulo Berlin, 1911, p. 370, ^ . 



Malaita: Intorior near Gwountafu. 



I am referring with doubt to this variety several workers and a 

 female which are darker in color and somewhat less shining; than the 

 preceding form. 



94. AcROPYGA (Rhizomyrma) lauta, sp. nov. 



]]'orkcr. Length 1.50 mm. 



Near oceanica Emery. 



Head a little longer than broad, as broad in front as behind; sides feebly 

 convex; posterior angles rounded, border slightly concave. Mandibles nar- 

 row, with four separated, acute teeth. Clypeus truncate at middle of front, 

 obtusely angulate at side of truncated portion. Antenna! scapes not attain- 

 ing occipital corners; first funicular joint more than twice as long as broad; 

 second joint campanulate, longer than broad; joints three to six a little broader 

 than long; terminal joint as long as the three preceding joints. Eyes minute, 

 situated in front of sides of head at anterior third. Thorax stout. Posterior 

 half of pronotum strongly convex, in front concave. Mesonotum longer than 

 broad, rather flat above. Epinotum with base convex and evenly rounding 

 into the declivity, which is flattened and twice as long as the base. Petiolar 

 node erect, narrow. Gaster elongate. 



Shining throughout. Mandibles punctate. Head and gaster with dense, 

 fine, and shallow punctation, which is somewhat coarser on the gaster. 



Head, gaster, and legs finely and denseh^ pubescent, thorax and epinotum 

 sparseh' so. 



Color yellow; head slightly darker, mandibular teeth brownish to black. 



Female. Length 2.25. 



Head broader than long. OcelU large. Frontal sulcus shallow. Eyes a 

 third as long as head, feebly convex. Antennal scapes slightly surpassing 

 occipital corners. 



Wings (length 2.75 mm.) hyaline, veins and stigma fuscous. 



San Cristoval: Pamua, Wainoni Bay. Malaita: Auki. 

 Workers and females in a small series taken from beneath a stone 

 differ from Emery's descriptions and figure of oceanica in having the 



