5S2 M. OSIIIMA : 



Length of body 3,50 mm. 



Length of head with rostrum 1,65 mm. 



Lengtli of head without rostrum 1,00 mm. 



Width of head 1,09 mm. 



Width of pronotum 0,50 mm. 



Worker (the larger form). — Head chestnut brown, sparingly pro- 

 vided with spiny hairs; abdominal tergites covered with minute hairs, 

 posterior ones with longer hairs. 



Head quadrate, with rounded posterior border ; sutures of head 

 distinct ; basal portion of clypeus much shorter than half the width, 

 slightly swollen ; antennae 14-jointed, 3rd joint longer than 2nd, 4th 

 joint shorter than 3rd ; pronotum saddle-shaped, anterior border two- 



lobe d. 



Length of body 5.00 mm. 



Width of head 1,25 mm. 



Width of pronotum 0,78 mm. 



Worker (the smaller form). — Head dark brown, transversal band 

 considerably paler. Head coarsely pilose, abdominal tergites densely 

 provided with minute hairs, with a series of spiny hairs along the 

 posterior border; sutures of head very distinct; antennas 14-jointed, 

 2nd joint as long as 3rd, 4th joint much shorter than 3rd ; pronotum 

 saddle-shaped, anterior and posterior borders rounded, not emarginate 



at middle. 



Length of body 3,80 mm. 



Width of head 0,94 mm. 



Width of pronotum 0,44 mm. 



Habitat. — Los-Banos, Luzon; collected by Prof. Baker. 



