1954 ] Wheeler and Wheeler — Basicerolini ami Dacetini Ant Larvae 143 
transverse slit. Hypopharnyx spinulose, the spinules in 
rather long transverse rows. (Material studied: two 
dozen larvae from Alabama; courtesy of Dr. W. L. Brown.) 
Wilson, 1953, p. 486: The food consists chiefly of Col- 
lembola, but a few other arthropods are eaten. 
Smithistruma brevisetosa (M. R. Smith) 
Wilson, 1953, p. 485 : ‘This species appears to be identical 
in food habits to Smithistruma rostrata” 
Smithistruma clypeata (Roger) 
Wilson, 1953 : The food of the larvae consists mostly of 
Collembola, but a few other arthropods are eaten (p. 
486). The life cycle was found to be: egg, 14 days; larva, 
25 days; pupa, 14 days (p. 491). 
Smithistruma dietrichi (M. R. Smith) 
Wilson, 1953, p. 487 : The larval food consists chiefly 
of Collembola, but a few other arthropods are used. 
Smithistruma epinotalis (Weber) 
Semipupa (?) : Length about 1.8 mm. Similar to talpa, 
but differing in the following details: Anchor-tipped body 
hairs slightly longer (about 0.15 mm) and occurring on 
abdominal somites I-IV only. Occipital border of cranium 
slightly convex at the middle. Head hairs shorter (0.036- 
0.054 mm). Labial palps each with five sensilla. (Material 
studied : two damaged specimens from Costa Rica and Mex- 
ico.) 
Smithistruma missouriensis (M. R. Smith) 
Wilson, 1953, p. 486: The food of the larvae consists of 
Collembola. 
Smithistruma nigrescens (Wheeler) 
(PI. 9, fig. 19) 
Mature larva: Length about 1.6 mm. Similar to talpa 
but differing in the following details: Body hairs — (1) 
slightly longer (0.02-0.09 mm) ; (2) longer (0.063-0.088 
mm) ; (3) longer (about 0.144 mm) and occurring on ab- 
dominal somites l-V only. Head hairs slightly longer 
(0.056-0.085 mm). Mandibles more slender. Labial palp 
with five sensilla. 
