130 
Psyche 
[December 
as a group than are the larvae of the Solenopsidini (either 
in the sense of Emery or in the sense of Wheeler) to the ex- 
tent that at least a few minor characters are common to all 
the known genera. The subtribes, however, are homo- 
geneous and easily differentiated. Within each subtribe the 
genera are not easily distinguished. 
Tribe Pheidologetini Emery 
Body hairs moderately numerous and uniformly dis- 
tributed. Anchor-tipped hairs absent. Antennae small. 
Head hairs few. Labrum short and broad (breadth 2X 
to 3x length). Ratio of head width to mandible length = 
3.0 to 4.0 ; average 3.5. Ratio of mandible length to mandible 
width (at base) = 1.4 to 2.4; average 1.7. Surface of maxil- 
lae without spinules. Anterior surface of labium spinulose. 
Subtribe Lophomyrmicini Emery 
Body hairs all of the same shape: either with the tip 
denticulate or with the tip bifid. Labrum trilobed, the 
median lobe projecting posteriorly. Posterior surface of 
labrum densely spinulose. Mandibles as a whole curved 
medially; teeth surrounding a denticulate area; anterior 
surface spinulose. Labium with a median anteroventral 
projection, which bears the opening of the sericteries at its 
apex. Labial palp a low knob bearing five sensilla. Hypo- 
pharynx spinulose. 
Genus Lophomyrmex Emery 
Thorax rather stout and bent ventrally at right angles; 
abdomen elongate-ovoidal ; diameter greatest at the fourth 
and fifth abdominal somites; posterior end broadly rounded. 
Body hairs moderately numerous and short; all with the 
tip denticulate. Antennae small. Head hairs few, short 
to moderately long, with the tip denticulate. Labrum small, 
trilobed, with the median lobe projecting posteriorly; pos- 
terior surface densely spinulose. Mandibles slender and 
thin; curved medially; apical tooth curved medially and 
posteriorly ; a large anterior subapical tooth directed antero- 
ventrally; a large blunt medial tooth directed postero- 
ventrally ; teeth surrounding a denticulate area ; anterior 
surface with several sharp spinules. Maxillary palp a peg 
