144 
Psyche 
[December 
spinules. Body hairs moderately numerous, uniformly dis- 
tributed and short. Of two types: (1) deeply bifid, about 
0.036 mm long, with the branches curling away from each 
other, the most abundant type, without alveolus and articu- 
lar membrane, absent from the ventral surface; (2) a few 
on the ventral surface, about 0.018 mm long, nearly straight, 
with the tip bifid, with alveolus and articular membrane. 
Cranium transversely subelliptical in anterior view, slight- 
ly broader than long. Antennae each with three sensilla, 
each of which bears a spinule. Head hairs few, short 
(about 0.027 mm), those dorsal to the antennal level deep- 
ly bifid, ventral to the antennal level with bifid tip. Labrum 
small, short (breadth 2.2 X length) ; subrectangular, but 
with the ventral corners rounded; anterior surface with 
about ten sensilla ; posterior surface with about six sensilla. 
Mandibles short, stout and heavily sclerotized ; apex slender 
and curved medially; anterior surface produced into a 
medial blade which bears two stout medial teeth; posterior 
surface with one medial tooth. Maxillae with the apex 
paraboloidal; palp represented by a cluster of four sensilla 
(two encapsulated and two bearing a spinule each) ; galea 
a short frustum with two apical sensilla. Anterior surface 
of the labium with a few rows of minute spinules; palp 
represented by a cluster of four sensilla (two encapsulated 
and two bearing a spinule each) ; an isolated sensillum be- 
tween each palp and the opening of the sericteries; the 
latter a short transverse slit. (Material studied: a single 
damaged integument from the Congo.) 
Bischoff (1927, pp. 94-95) cited Wheeler (1918) on tro- 
phallaxis in this species. 
Forel (1922, p. 83 = 1928, Vol. I, pp. 462-463) cited the 
same. 
Wheeler, 1918: “The larva has a singular shape, being 
almost spherical, with a short neck, small head and minute, 
bidenticulate mandibles. The delicate integument is studded 
with very short, stiff hairs, each of which has two recurved 
branches. The larvae, which are held together in compact 
masses by the interlocking of these hooked hairs, are fed 
with liquid food by regurgitation as is evident from the 
contents of their large spherical stomachs and the very 
feeble development of their mouthparts. Although, like 
