422 PROCEEDINGS OF SECTION D. 
DITROPIDUS MANDIBULARIS, N.sp. 
*. Oblong-ovate; black, with a slight bronzy gloss; 
mouth-parts, base of antenne, knees, and pygidium obscure 
testaceous ; prothorax red, but largely stained with piceous. 
Head densely punctate; median line distinct ; mandibles 
large and prominent. Prothorax with moderately dense 
and large punctures, becoming substrigose at sides; basal 
lobe acutely notched. Elytra seriate, sides striate-punctate ; 
interstices very indistinctly wrinkled. Length 34mm. 
+. Differs in having the head and mandibles smaller and 
the prothorax narrower at apex. 
Hab.—Swan River. 
Allied to fugitivus, but considerably different in colour. 
The piceous stain on the prothorax covers almost the entire 
apical half, and is connected with base along middle and 
tewards each side. 
DirrRopipus SUBSIMILIS, N.sp. 
+. Oblong-ovate ; black; the elytra with a slight coppery 
or greenish gloss; prothorax (including flanks of prosternum) 
red, except at extreme base and apex; mouth-parts and base 
of antenna obscure testaceous. 
Head densely punctate; median line distinct. Prothorax 
distinctly but not densely or strongly punctate, and nowhere 
strigose; basal lobe acutely notched. LElytra seriate—the 
sides striate-punctate; interstices impunctate. Length 
34mm. 
Hab.—.W.A.: Geraldton. 
Allied to fugitivus, but the head (except mouth-parts) 
entirely dark. I have three specimens (all females) under 
examination. A specimen from Queanbeyan (New South 
Wales) differs in having the median line of the head more 
distinctly impressed, the elytra without a coppery gloss, and 
the black basal margin of the prothorax slightly wider. 
DITROPIDUS NIGRICOLLIS, n.sp. 
Briefly elliptic ovate; pale testaceous; head stained with 
piceous towards sides and base; prothorax, basal eighth of 
elytra, sterna, and basal segments of abdomen (except at 
sides) deep black. 
Head indistinctly punctate; median line feeble. Pro- 
thorax with the basal lobe but feebly produced and obtuse ; 
very densely and finely longitudinally corrugated through- 
out. Elytra striatepunctate, punctures distinct, but striz 
* Male. 7 Female. 
