490 CLAUDE FULLER. 



series obconic, increasing in length and width to penultimate 

 joint ; penultimate longer than ante-penultimate. Apical 

 joint narrow, elongate-fusiform. 



Gula concolorous with ventral genge ; with very short free 

 apex. Sides parallel, straight but tapering to apex ; not as 

 wide as post-geofe. 



Thorax. — Concoloi-ous with head. Pi'onotum sellate. 

 Mesonotum wider than pronotum. Metanotum wider than 

 mesonotum. 



Legs pallid, tibia appearing 2-segmented and with a 

 patella. 



Abdomen. — Transparent, contents visible ; broad oval. 



Worker. 



Measurements. — Total length 3"5 to 5 mm. ; head-width 

 1 mm. 



Head. — Vertex pale creamy-white; frons milk-white; 

 superior articulations of mandibles forming dark brown spots ; 

 clypeus and labrum creamy-white, mandibles pallid, teeth 

 red-brown. 



Antennas pallid, translucent ; 15 joints. III and V small; 

 III very small ; otherwise much as with soldier. 



Legs pallid, tibia appearing 2-segmented and Avith a 

 patella. 



Abdomen. — Broadly ovate ; transparent, contents visible. 



Hab. — Cape Colony; Port Elizabeth, Stellenbosch district. 



Nest-series of this species have been collected for me by 

 several of my colleagues, amongst whom Mr. C. P. van der 

 Merwe has sent the largest. In several series there are 

 soldiers of an undetermined kind, probably a social species. 

 Mr. van de Merwe informs me that a great many of the nests of 

 E. hastatus are occupied in part or wholly by the Argentine 

 ant (Iridomyrmex humilis Mayr.). This ant has been 

 introduced comparatively recently into the Cape, and has 

 now acquired a strong foot-hold in the Stellenbosch district. 

 It will be interesting to note, as time proceeds, whether 



