TKHMJTKS KI«)M TH K AU.S'l'RA !JA\ RKfJIOX. 
paper for those of L. clarkl. The following descriptions are from 
specimens from Mundaring, Houth-west Australia. All possibility 
of these s]jecimens not being conspecillc with the type (soldier) of 
L. clarkl, from Swan River, South-west Australia, has been eliminated 
by a careful comparison of several riest series from both localities 
with each f)ther and with the ty]ie. 
Imaoo. 
Colour. Head clay colour, suffused with brown on dorsal surface ; 
antennae, clypeus and legs somewhat ])aler ; thorax and abdomen 
clay colour to Dresden brown ; wings buffy brown, costal margin 
distinctly paler (especially noticeable i?i s|)e(imens in alcfdiol). 
Heud. Small, about as long as wide, moderately hairy, Hat 
between fontanelle and clyjieus. ('lyjieus small, three-eights as long 
as widen markedly convex, glabrous, divided by a distinct suture” 
the articulation of the mandibles lorming a ferruginous s]iot at each 
end, ])osterior margin arcuate, the anterior margin slightly concave, 
two rows of four inoderately stout setae, the anterior most of which 
is very near the margin. Antecly])eus very short, but as long as 
postclypeiis, anterior margin truncate. Labrum very small, about 
one-fifth longer than clypeus, wide at base, narrowed shar|)ly to 
the rounded ajiex, with a fe^v setae on apical half. Antennae'' 18-, 
more often, ID-jointed ; the 8rd generally smallest ; 4th a little 
longer than 5th and 6th ; very rarely the 3rd a little larger than 
4th. and the 4th^ smallest of all ; the remaining joints moniliform, 
the last hve or six, excepting the apical one, more stalked than the 
preceding ones. Dyes small, .subtriangular, vertical ami horizontal 
diaineter equal, i.e.. 0-204 -0-238. not ])rominent. widely separated 
(0-153 0-187) from the lower margin of the head. ()celli small, 
broadly cival, very close to but not touching the eves. Fontanelle 
small, cnculai, very distinct, in line with tlie [losterior margin of 
the eyes. 
Thorax. ITonotum of tyjiical form, narrower than head, the 
anterior margin slightly raised, curved, with deep and narrow notch 
in the muhlle ; anterolateral angles rounded ; sides narrowed to the 
sinuate posterior margin ; a deep im])ression behind the anterior 
margin on each side of the median line the whole surface moderately 
setaceous, like lieail. Meso- and metanotum widely notched iioste- 
riorly, both more distinctly than the |)ronotum. ' the mesonotum 
more markedly than the metanotum. 
Wings. Wing-stumps of the mesonotum larger than those of 
metanotum. not quite reaching the apex of the sclerite • those of 
the metanotum covering about two-thirds of its sclerite ' the base 
of the veins very distinct Wings (Figs. 171 and 172) long and 
slender ; the radial sector- darkest m colour, well separated from the 
[ 46 ] 
