MANN: ANTS OF THE BRITISH SOLOMON ISLANDS. 



289 



joint is longer than broad and the remaining joints are as long as broad. 

 In the closely related E acuta Emery the third joint is described 

 as being as long as broad, the remaining apical joints, except the 

 terminal are transverse and the mandibular blades have only five teeth. 

 The two species are evidently very closely related and it is probable 

 that Forel's dalili from the Bismarck Archipelago is only a subspecies 

 of, if not identical with, rxarafa. 



In the specimens before me the first gastric segment is heavily 

 strigose longitudinally and the second segment is much more delicately 

 sculptured, as described in the three forms mentioned above. 



Ysabel : Fulakora. 



14a. EcTOMOMYRMEx EXARATA Emery, subsp. aequalis, subsp. nov. 



Worker. Length 6-6.5 mm. 



Differing from the t^TDical form in its somewhat smaller size and in having 

 the striae of the second gastric segment not appreciably finer than that of the 

 first, though with fewer punctures between. 



Fig. 7. — Ectomomyrmex exarata aequalis Mann, 

 and petiole. 



Worker. Lateral view of thorax 



Described from several workers taken at Auki, Malaita and one at 

 Tulagi, Florida. The Auki specimens were together and evidently 

 belonged to the same colony, but I was unable to locate the nest. 

 Typc.—M. C. Z. 9,155. 



The species of Ectomomyrmex in their timid behaviour are similar 

 to Bothroponeta. 



