MANN: ANTS OF THK HHITISH SOLOMON ISLANDS. 299 



4. Lobe of clypeus broader than long, broad in front and slightly concave at 



middle of border. Length 6.5 mm. (Santa Cruz) .... truntxila Mann. 



Lobe of cl^^>eus longer than broad and pointed apically. Length 6.5- 



7 mm. (Solomons) foreli Mann. 



27a. Leptogents(Lobopelta)diminuta (F.Smith), subsp. santschi, 



subsp. nov. 



Worker. Length 6.25 mm. 



Differing from the t\-pical dimimita in its somewhat more slender habitus 

 and in the following characters: — the mesocpinotal impression is narrower. 

 The mesopleurae are strongly, denseh^, and accurately striate. The epinotal 

 base is not as rugose as the declivity, which has regular, transverse, and parallel 

 striae, stronger than in diminuta and not interrupted by the lateral tubercles. 

 The latter are much smaller than in diminuta so the declivous surface is broader 

 at the base. The petiolar node is higher in proportion to the length. 



The front of head has arcuate striae as in diminuta. The body, node, and 

 gaster are shining. 



Female. Length 7.5 mm. 



One specimen among a very large series, has the gaster longer and more 

 enlarged than the others and e\'idently represents the sexual phase. The 

 petiole is very slightl}^ thinner in profile than in the ordinary workers, but 

 otherwise there is no difference in structure. 



Male. Length 5 mm. 



Head, excluding e3-es, longer than broad. Mandibles short and bluntly 

 pointed. Clj-peus large and convex, the anterior border slightly concave at 

 middle. Anteunal scape more than twice as long as the first funicular joint; 

 second funicular joint three and one half times as long as the first; succeeding 

 joints gradually becoming shorter; terminal joint one and five eighths times 

 as long as the preceding. Ej-es and ocelli large and prominent. Prothorax 

 little convex above. Scutellmn longer than broad. Epinotmn convex basally, 

 the declivoiis portion flat. Petiolar node in profile longer than high; seen 

 from above, circular in shape. First and second gastric segments with a 

 strong constriction between. 



Feebh' shining; head punctate and finely striolate; the striolae surrounding 

 the ocelli coarser than elsewhere. Thorax ruguloseh- striate, the striae on 

 apical half of mesothorax converging toward the center; those on scutellmn 

 longitudinal and finer. Epinotum granulosely punctate. Petiolar node and 

 gaster finely and sparsely punctate and shining. Femora densely and rather 

 coarsely punctate. Clypeus and legs with semierect pile. 



