1953] 
Wheeler and Wheeler — Myrmicine Larvae 135 
surface. Antennae small. Head hairs few, short, simple 
or with denticulate tip. Labrum subrectangular ; posterior 
surface sparsely spinulose. Mandibles small, short, stout 
and thick; apex forming a small tooth which is curved 
medially and posteriorly; with two small medial teeth near 
the anterior surface. Maxillary palp a low elevation bear- 
ing four sensilla; galea a low knob. Labial palp represented 
by a cluster of four sensilla. Sexual (?) larva voluminous, 
plump, turgid, bean-shaped; head exceedingly minute, on 
the ventral surface near the anterior end; mandibles with 
the apical tooth vestigial and with only one medial tooth. 
Pheidologeton diversus (Jerdon) 
(PI. 6, figs. 8-16) 
Mature worker larva: Length about 2.1 mm. Short 
and stout; prothorax forming a stout neck, which is bent 
ventrally to a right angle; dorsal profile C-shaped, ventral 
profile of abdomen nearly straight; diameter greatest at 
abdominal somites III and iv. Anus ventral. Leg vestiges 
present. Segmentation indistinct. Mesothoracic spiracle a 
third larger than the metathoracic, the others diminishing 
slightly toward the posterior end. Integument of dorsal 
surface of posterior somites sparsely spinulose, the spinules 
minute and isolated or in very short rows; on the ventral 
surface of the thorax and abdominal somites I and il they 
are in longer rows. Body hairs moderately numerous and 
short. Of three types: (1) deeply bifid, about 0.054 mm, 
with the branches curling away from each other and en- 
larged at the tip, the most abundant type, absent from the 
ventral surface; (2) bifid, 0.024-0.054 mm, with the 
branches acuminate and nearly straight, a few on the 
ventrolateral surfaces; (3) simple, about 0.024 mm, a few 
on the ventral surface; there are intergrades between the 
several types; a few hairs on the ventral surface have 
alveolus and articular membrane. Head large; cranium 
suboctagonal, but with the angles rounded, slightly broader 
than long. Antennae small, each with three (rarely four) 
sensilla each bearing a spinule. Head hairs few, short 
(0.006-0.036 mm), simple or with the tip denticulate. Lab- 
rum short and broad (breadth 3x length) ; subrectangular, 
with the ventral corners rounded; each half of anterior 
