142 
Psyche 
[December 
rounded and formed from the dorsum of the prothorax; 
thorax and first abdominal somite strongly curved ventral- 
ly; head ventral; dorsal profile C-shaped, ventral feebly 
sinuate. Anus ventral. Segmentation indistinct. Spiracles 
small, diameter decreasing slightly from the mesothoracic 
toward the posterior end. Integument of the ventral sur- 
face of the thorax and abdominal somites i and ii with 
short rows of minute spinules. Body hairs moderately 
numerous, short to moderately long and (except for a 
small ventral naked area on the thorax and first two 
abdominal somites) uniformly distributed. Of three types: 
(1) few, 0.018-0.072 mm long, on the ventral surface of 
the thorax and abdominal somites i-vi, slightly curved 
and denticulate; (2) on the dorsal and lateral surfaces, 
0.018-0.072 mm long, bifid, with a few denticles on each 
branch, the most numerous type; (3) anchor-tipped, with 
tortuous shaft, about 0.125 mm long, four in a row across 
the dorsal surface of each abdominal somite i-vi; types 1 
and 2 with or without alveolus and articular membrane. 
Head moderately large; cranium transversely subelliptical 
in anterior view, a fourth broader than long; occipital 
border slightly concave at the middle. Antennae small, 
each with only two sensilla, each of which bears a short 
spinule. Head hairs few, flexible, moderately long (0.054- 
0.072 mm) and denticulate. Labrum small, breadth 2.7 
times length ; bilobed, due to a median concavity of the 
ventral border ; anterior surface of each lobe with three 
sensilla; ventral border of each lobe with a few spinules 
and two contiguous sensilla ; posterior surface of each lobe 
with three sensilla; middle half of posterior surface spin- 
ulose, the spinules minute and in transverse rows. Man- 
dibles heavily sclerotized; subtriangular in anterior view; 
apical tooth long, slender, sharp-pointed and curved medi- 
ally; two sharp-pointed teeth on the inner border. Max- 
illae short and lobose; palp a low elevation bearing four 
sensilla ; galea digitiform, with two apical sensilla. Labi- 
um large ; anterior surface spinulose, the spinules in curved 
subtransverse rows; with a pair of mammiform ventro- 
lateral lobes, each bearing a palp, which is a low eleva- 
tion with four sensilla; an isolated sensillum between each 
palp and the opening of the sericteries; the latter a short 
