134 
Psyche 
[December 
latter a short transverse slit. Hypopharynx spinulose, the 
spinules minute and in short transverse rows. 
Young larva: Length about 1.4 mm. Similar to the 
mature larva, except in the following details: postanal 
lip large; body and head hairs shorter; palps and galeae 
shorter. 
Material studied : 20 larvae from Kallista, Victoria, 
Australia, IX-50; collected by Dr. W. L. Brown. 
Brown, 19535: The larvae feed only on collembolans. 
Genus Clarkistruma Brown 
Shaped somewhat like a crookneck squash; thorax and 
first abdominal somite forming a short and very stout 
neck which is bent ventrally to about 90°; remainder of 
abdomen much stouter, its dorsal profile c-shaped, its ven- 
tral nearly straight. Body hairs short, very sparse, stout, 
blunt-pointed and scarcely tapering. Of two types: (1) 
a few on the anterior portion of the prothorax and on the 
ventral surface, with denticles on or near the tip; (2) 
deeply bifid, with the branches strongly divergent and 
curved. Antennae minute; with three sensilla each. Head 
hairs long, stout, scarcely tapering, blunt, with denticles 
on and near the tip. Posterior surface of labrum without 
sensilla. Middle 2/3 of labium raised into a ventral pro- 
jection. 
Clarkistruma alinodis (Forel) 
(PI. 8, figs. 11-15) 
Length about 2.4 mm. Shaped somewhat like a crookneck 
squash ; thorax and first abdominal somite forming a short 
and very stout neck which is bent ventrally to about 90°; 
remainder of abdom^en much stouter, its dorsal profile C- 
shaped, its ventral nearly straight. Anus ventral. Spiracles 
small; the mesothoracic the largest, diameter decreasing 
posteriorly. Integument of ventral surface of anterior 
somites with numerous short transverse rows of minute 
spinules ; dorsal surface of last few abdominal somites with 
a few short rows of minute spinules. Body hairs very 
sparse, short, stout, blunt-pointed and scarcely tapering. 
Of two types: (1) a few on the anterior portion of the 
prothorax and on the ventral surface, 0.018-0.11 mm long, 
