128 
Psyche 
[December 
^ Orectognathus versicolor Donisthorpe 
Mature larva: Length about 3 mm. Generally similar 
to clarki but differing in the following details: Mandibles 
with the apical tooth shorter and stouter and the blade 
narrower. Anterior surface of labium with only two swell- 
ings, the spinules moderately abundant; palp a skewed 
frustum. (Material studied: numerous larvae from 
Queensland and New South Wales.) 
Genus Epopostruma Forel 
Shaped somewhat like a crookneck squash; thorax and 
first abdominal somite forming a long and rather slender 
neck; metathorax constricted. Remainder of abdomen very 
stout ; dorsal profile C-shaped, ventral nearly straight ; seg- 
mentation indistinct. Body hairs short and moderately 
numerous. Of two types: (1) slightly curved, with the 
distal 2/3 denticulate, a few on the ventral surface; (2) 
bifid, with the branches denticulate. Antennae minute; 
with three sensilla each. Head hairs moderately long, flex- 
ible, with the distal half denticulate. Posterior surface of 
labrum with 12 sensilla. Middle 2/3 of labium raised into 
a ventral projection. 
■Epopostruma sp. 
(PI. 7, figs. 15-19) 
Length about 3.4 mm. Shaped somewhat like a crookneck 
squash; thorax and first abdominal somite forming a long 
and rather slender neck, which is bent ventrally to 90°; 
metathorax constricted. Remainder of abdomen very stout; 
dorsal profile C-shaped, ventral profile nearly straight; 
segmentation indistinct. Anus ventral. Leg vestiges indis- 
tinct. Spiracles small ; the mesothoracic the largest, diam- 
eter decreasing posteriorly. Integument of the ventral 
surface of the thorax and anterior abdominal somites and 
the dorsal surface of the posterior somites spinulose, the 
spinules minute and in short transverse rows. Body hairs 
moderately numerous; uniformly distributed, except for 
naked intersomitic areas. Of two types: (1) short (0.054- 
0.185 mm), slightly curved, with the distal 2/3 denticulate, 
a few on the ventral surface; (2) short (0.07-0.11 mm), 
