74 
Psyche 
[March-June 
a short skewed peg with five sensilla; each galea a short frustum 
with two apical sensilla. Labium narrowly paraboloidal ; sparsely 
spinulose, the spinules minute and in short transverse rows ; each palp 
represented by a cluster of five sensilla; an isolated sensillum be- 
tween each palp and the opening of the sericteries, the latter a short 
transverse slit. No spinules on hypopharynx. 
very young larva. Length (through spiracles) about 1.6 mm. 
Abdomen sac-like, thorax forming a stout neck. Integument of ven- 
ter of anterior somites and entire surface of posterior somites with 
minute spinules. Body hairs sparse. Of three types: (i) o.oi 3-0.1 
mm long, on dorsal and lateral surfaces of thorax and on dorsa of 
AI-AIV; (2) about 0.006 mm long, on venter of Ti, few on AV : 
(3) about 0.1 mm long, four each on AI-AIV. Antennae minute, 
each with three sensilla. Head hairs about 1/3 as numerous, minute 
(0.002-0.005 mm long). Labium subrectangular ; anterior surface 
with about ten sensilla. Mandibles subtriangular in anterior view, 
with all teeth sharp-pointed. Each maxillary palp represented by a 
cluster of five sensilla; each galea represented by two contiguous 
sensilla. Otherwise as in the mature larva. 
Material studied : numerous larvae from Colorado, G. C. and 
J. Wheeler #16. 
The larva of L. provancheri resembles our other species of Mycho- 
thorax in profile and in mandible shape, but it differs markedly in 
the shape of the dominant type of body hair, in the shape of the head, 
in the shape of the labrum, and in the abundance and size of head 
hairs. 
Genus Rogeria Emery 
Because we had inadequate material previously (1955: 28) we 
are giving a complete description below. 
revised description. Profile solenopsidiform. Body hairs mod- 
erately abundant ; of two types — ( 1 ) short, generally distributed 
and variously branched and (2) anchor-tipped, on mesothorax, meta- 
thorax and first three abdominal somites. Head hairs moderately 
numerous, moderately long and bifid. Mandibles leptothoraciform. 
In our 1960b key Rogeria would go to “ Monomorium antarcti- 
cum” ( = Chelaner) , from which it cannot be distinguished generic- 
ally. 
Rogeria pro c era Emery 
(Fig. 2) 
Length (through spiracles) about 4 mm. Solenopsidiform (i.e., 
short and stout; head ventral, near the anterior end; prothorax bent 
