112 
Psyche 
[December 
formly distributed (except that some part of the midventral 
surface is naked), denticulate and of two types: (1) short 
and flexible; (2) a few long and slightly curved or flexible. 
Cranium vaguely subhexagonal in anterior view, but with 
the occipital border impressed at the middle. Clypeus bulg- 
ing. Antennae minute. Head hairs long, flexible and den- 
ticulate. Ventral border of labrum spinulose, with two or 
three sensilla; posterior surface spinulose. Mandibles 
rather long and narrow, slightly curved medially; with 
one apical tooth and two teeth on the inner border; some 
part of the surface furnished with a few spinules or den- 
ticles. Each maxilla divided into two parts by a trans- 
verse lateral impression, the basal half swollen laterally 
and bearing the palp, the distal spinulose (at least in part) 
and bearing the galea; palp and galea digitiform. Labium 
with all surfaces spinulose; palp a low knob bearing five 
sensilla; an isolated sensillum between each palp and the 
opening of the sericteries ; the latter a short transverse 
slit. Hypopharynx spinulose. 
Genus Basiceros Schulz 
Moderately stout. No neck, but thorax and first two 
abdominal somites strongly curved ventrally. Body hairs 
moderately numerous, of at least two types: (1) short, 
denticulate and flexible; (2) moderately long, denticulate 
and slightly curved. Labrum trilobed. Mandibles with 
two very stout medial teeth on the inner border; basal 
third of inner surface with minute spinules in arcuate 
subtransverse rows. Maxillae large; palp with four apical 
sensilla. Labium large. 
Basiceros sp. 
(PL 10, figs. 16 and 17) 
Body moderately stout; diameter greatest at abdominal 
somite iv, decreasing gradually to i, then increasing slightly 
to the mesothorax; thorax and first two abdominal somites 
strongly curved ventrally. Anus ventral. Spiracles small, 
mesothoracic slightly larger than the rest. Integument 
of ventral surface of thorax with spinules in transverse 
rows. Body hairs moderately numerous and uniformly 
