1954] Wheeler and Wheeler — Basicerotini and Dacetini Ant Larvae 131 
each palp and the opening of the sericteries; the latter a 
short transverse slit on the ventral surface. Hypopharynx 
with a few short arcuate rows of spinules. (Material 
studied: a dozen larvae from Victoria, Australia; hairs 
broken off.) 
Genus Alistruma Brown 
Thorax and first abdominal somite strongly curved 
ventrally; dorsal profile C-shaped, ventral J-shaped; begin- 
ning with the anterior end of the prothorax the diameter 
increases to the mesothorax, decreases somewhat to abdom- 
inal somite i, increases to V and then decreases gradually 
to the posterior end, which is narrowly rounded. Body 
hairs sparse and moderately long. Of two types: (1) 
slightly curved, simple or denticulate, a few on the ventral 
surface; (2) mostly bifid (a few with one of the branches 
reduced to a denticle), the branches smooth or with very 
few denticles. Antennae small; with three sensilla each. 
Head hairs long, mostly simple (rarely denticulate). 
Posterior surface of labrum with 10 sensilla. 
Alistrutna n. sp. 
(PI. 9, figs. 4-10) 
Mature larva: Length about 3 mm. Thorax and first 
abdominal somite strongly curved ventrally; dorsal profile 
C-shaped, ventral J-shaped; beginning with the anterior 
end of the prothorax the diameter increases to the meso- 
thorax, decreases somewhat to abdominal somite i, increases 
to V and then decreases gradually to the posterior end, 
which is narrowly rounded. Anus ventral, with a small 
posterior lip. Segmentation distinct. Spiracles small; the 
mesothoracic the largest, the diameter decreasing posteri- 
orly. Integument of the ventral surface of the thorax and 
a few anterior abdominal somites and the dorsal surface 
of a few posterior somites with numerous short transverse 
rows of minute spinules. Body hairs uniformly distributed, 
moderately long and rather sparse. Of two types: (1) a 
few on the ventral surface, 0.036-0.16 mm long, slightly 
curved, simple or denticulate; (2) on the dorsal and lateral 
