52 
Psyche 
[March 
A single specimen from Los Banos, Luzon Island, Phil- 
ippines, taken by Dr. F. X. Williams in decaying wood. 
The specimen is evidently a worker maxima. The an- 
terior portion of its head is so unusual that it can hardly 
be assigned to Pseudolasius sens, str., but whether Nesol- 
asius will be regarded by other myrmecologists as an inde- 
pendent genus or as a subgenus of Pseudolasius may de- 
pend on the characters of the still unknown castes. Per- 
haps ForePs Ps. amblyops from the New Britain and his 
sundaicus from Sumatra should be assigned to Nesolasius. 
In the former the mandibles are 5-toothed and the eyes are 
reduced to a single facet. In Ps. amaurops Emery of New 
Guinea, which measures only 1.6-2 mm., the eyes are sim- 
ilarly reduced but the clypeus, frontal carinse and 6-toothed 
mandibles show that it belongs to Pseudolasius sens. str. 
