22 
T. D. A. COCKEEELL. 
angles acute; second to fourth tarsal joints small, cordiform; wings 
rather pale fuscous; nervures and stigma dark brown; hind wing with 
trans versomedial nervure a little oblique, with the lower end the most 
apical. 
The following measurements of the anterior wing are in u : 
Length of stigma . 920 
Depth of stigma 250 
Length of marginal cell 2210 
Depth of marginal cell 578 
First submarginal on marginal 250 
Second submarginal on marginal 782 
Upper section of basal nervure 290 
Lower section of basal nervure 1190 
Lower side of first submarginal cell (not allowing 
for distinct curve) 510 
Insertion of first recurrent nervure from basal 
lower corner of second submarginal cell . . 255 
Lower end of basal nervure to trans versomedial 135 
This genus represents a branch from the Clialcobombus series 
which did not persist. The peculiar venation appears to be quite 
normal, being the same on both sides. The idea that the insect might 
be an aberration of some Clialcobombus occurred to me, but there are 
numerous little differences, in addition to the loss of the second 
trans verso-cubital nervure. 
C/ialcobombus mavtialis sp. nov. 
5 . A small thickset bee, resembling the other species of Clial- 
cobombus , but distinguished by the form of the third submarginal cell, 
which is very broad above (its length below is about 700 above 460); 
the first recurrent nervure joins the second submarginal cell near its 
middle (357 p from base, 340 from apex); the tip of the marginal cell 
is 175 from costa (in Sophrobombus it is less than half that distance); 
the claws have a small inner tooth not far from the end. The co- 
loration is curiously suggestive of some of the Australian Colletidae. 
Length about 8 mm; without evident sculpture; mesothorax, scu- 
tellum and vertex dull black; prothorax and tubercles coppery red; 
face black; legs metallic copper red or crimson; abdomen black, the 
hind margins of the segments. very narrowly but conspicuously silvery- 
white, the dark part next to the margins stained with red, especially 
on the first segment. Pubescence black or dark fuscous, not abundant; 
