1935 ] 
Larva of Aliomerus 
93 
Mature worker larva (Pl. VII, Fig. 1) : Orthocephalic ; 
prothorax forming a*short, thick neck perpendicular to the 
rest of the body, which is subcylindrical ; nearly straight, 
rather stout, and slightly attenuated posteriorly; posterior 
end round-pointed; anus subterminal. Metamerism indis- 
tinct. Spiracles, 10 pairs. 
Body-hairs few, uniformly distributed, and arranged (at 
least on the abdomen) in transverse metameric rows and 
also (less regularly) in longitudinal rows. They fall into 
four types : (1) at the posterior end a very few small (about 
0.016 mm. long) slender hairs with bifid tips (PI. VII, Fig. 
16) ; (2) a very few small (about 0.016 mm. long) stout 
hairs with frayed tips on the ventral surface (PI. VII, Figs. 
13 and 14) ; (3) a few small (about 0.023 mm. long) slender 
hairs, which have the distal third serrate and often bent and 
are found on the prothorax and also near the posterior end 
(PI. VII, Fig. 17) ; (4) short (0.036-0.077 mm. long) highly 
variable hairs, which are typically rather stout, terete or 
flattened, sharply angulate at the basal third and again near 
the distal fifth ; the terminal portion is flattened and has ser- 
rate tip and margins; this type is mostly confined to the 
dorsal and lateral surfaces (PI. VII, Figs. 10-12, 15, and 
18-22). 
Integument thin, delicate, and (except on the thorax) 
furnished with minute spinules arranged in short transverse 
rows. 
Head (PI. VII, Fig. 8) moderately large; broadly subpyri- 
form in dorsal view, with the posterior border broadly 
rounded; width greatest in front of the antennae. Hairs of 
head few, about 0.023 mm. long, angulate or strongly curved 
just distal to the middle; apical half bearing two or three 
fine, short branches. Antennae rather large, with three sen- 
sillae, each bearing a spinule. 
Labrum (PI. VII, Fig. 9) small and short, the breadth be- 
ing twice the length ; three-lobed, the middle lobe somewhat 
larger and projecting farther forward than the lateral lobes ; 
dorsal surface with a pair of minute hairs near the center 
and usually a third hair near the middle of one lateral bor- 
der; each lateral lobe with several sensillse (each bearing a 
spinule) along the anterior border ; median half of ventral 
