1954] Wheeler and Wheeler — Basicerotini and Dncetini Ant Larvae 135 
with denticles near and on the tip; (2) deeply bifid with 
the branches strongly divergent and curved, 0.054-0.1 mm 
long. Cranium subhexagonal in anterior view ; slightly 
broader than long; occipital border straight. Antennae 
minute, each with three sensilla, each of which bears a 
spinule. Head hairs few, long (0.036-0.1 mm), stout, 
scarcely tapering, blunt, with denticles near and on the 
tip. Labrum bilobed due to a wide and deep impression of 
the ventral border; breadth 1.6 times length; anterior 
surface of each lobe with three to five sensilla ; ventrolateral 
corners spinulose; ventral border of each lobe with one 
isolated and two contiguous sensilla; posterior surface ap- 
parently without sensilla but with numerous rather long 
transverse rows of minute spinules. Mandibles with the 
apical half heavily sclerotized; apical tooth long, stout, 
sharp-pointed and curved medially; inner border produced 
into a blade bearing two rather stout acute teeth. Maxillae 
with the apex paraboloidal ; palp vaguely chair-shaped with 
one lateral (bearing a spinule) and four apical (two en- 
capsulated and two bearing a spinule each) sensilla; galea 
a tall cone bearing two apical sensilla. Labium large ; 
middle 2/3 raised into a ventral projection; anterior sur- 
face spinulose, the spinules minute and in numerous 
arcuate rows; palp sim.ilar to maxillary palp but smaller; 
an isolated sensillum between each palp and the opening 
of the seri^teries; the latter a very short transverse slit 
cn the ventral surface. Hypopharynx with long transverse 
rows of minute spinules. (Material studied: twenty larvae 
from South Queensland; courtesy of Dr. W. L. Brown.) 
Brown, 1953& : The larvae feed only upon collembolans. 
Genus Struniigenys F. Smith 
Short and stout; prothorax short and directed ventrally; 
head ventral ; dorsal profile C-shaped, ventral feebly si- 
nuate; diameter of body increasing gradually from anterior 
end to abdominal somite V, then decreasing to posterior 
end. Segmentation indistinct. Body hairs moderately 
numerous and short to moderately long. Of three types : 
(1) on the ventral surface, few, denticulate, flexible: (2) 
bifid, with the branches denticulate; (3) anchor-tipped, 
with tortuous shaft, four in a row across the dorsum of 
