114 
Psyche 
[December 
dozen on each somite (except abdominal somites ix and 
x). Mandibles with two moderately stout medial teeth; 
a small patch of minute spinules on the medial surface 
just above the middle. Maxillary palp with five sensilla. 
Labium large. 
Aspididris militaris Weber 
(PI. 6, figs. 11-15) 
Body moderately stout; diameter greatest at abdominal 
somites V and VI, decreasing to I, then increasing slightly 
to the mesothorax, then decreasing rapidly to less than 
the diameter of the head. Thorax and first two abdominal 
somites strongly curved ventrally; dorsal profile c-shaped, 
ventral J-shaped. Anus ventral. Leg and wing vestiges 
present. Spiracles small, mesothoracic slightly larger than 
the rest. Integument of the ventral surface of the thorax 
and abdominal somites i and ii spinulose, the spinules in 
rather short subtransverse rows. Body hairs numerous 
and uniformly distributed except for a naked strip on the 
midventral surface of the thorax and abdominal somites 
I and II. Of two types: (1) short (about 0.19 mm), flex- 
ible, denticulate, on all somites, without alveolus and arti- 
cular membrane; (2) long (about 0.32 mm), curved or 
flexible, denticulate, with alveolus and articular membrane, 
about a dozen on each somite except abdominal somites 
IX and X. Cranium vaguely subhexagonal in anterior view; 
a third broader than long; occipital border feebly impressed 
at the middle; clypeus bulging. Antennae minute, each 
with three sensilla, each of which bears a spinule. Head 
hairs moderately numerous, long (0.09-0.193 mm), flexible 
Explanation of Plate 6 
Rhopalothrix gravis Mann, Figs. 1-10, — 1, head in anterior view, 
X76; 2, left mandible in anterior view, Xl48; 3, left mandible in 
posterior view, X148; 4, immature(?) larva in side view, X32; 5 and 6, 
two types of body hairs, X185; 7, left maxilla in anterior view, X235; 
8, left maxillary palp in anterior view, X470; 9, left labial palp in pos- 
terior view, X470; 10, profile of mature larva in side view. (After Men- 
ozzi, 1936). 
Aspididris militaris Weber, Figs. 11-15. — 11 and 12, two types of 
body hairs, X109; 13, larva in side view, X20; 14, left mandible in an- 
terior view, X95; 15, head in anterior view, X53. 
