388 STUDIES IN AUSTRALIAN ENTOMOLOGY, XVI., 



The type-specimen of this strange species was given to me hy 

 Mr. C. French many years ago, as coming from the Gulf of Car- 

 pentaria, opposite the Wellesley Islands. It has no resemblance- 

 to any other species of Phorticosomus, being far more convex, 

 and with the prothorax much less narrowed posteriorly. P. 

 zahroides resembles the European Zabrus ieuebrioides Goeze, so 

 closely in size, shape, and a])pearance that one's first impression 

 is that a species of Zabrus is before him; but it differs from Z. 

 ienebrioides by elytra with humeral angles not marked, margia 

 not interrupted posteriorly, etc. 



Tribe Trigonotomini. 

 Genus N u R i d i u s . 



NURIDIUS GRANDIS, n.Sp. 



Broad, robust, convex; head large(8'7 mm. across eyes), para- 

 gente widely dilatate behind base of mandibles, with anterior 

 angles widely rounded, two supraorbital setse on each side, clypeus 

 plurisetoi^e, mandibles plurisetose in basal concavity of outer side; 

 prothorax subquadrate, widest at anterior fourth, base and apex 

 of equal width(9 mm.), base widely depressed and fringed with 

 hair; elytra truncate-oval, lightly and evenly rounded on sides, 

 finely punctate-striate, interstices convex, third 2-punctate on 

 apical half, base not bordered, humeral angles dentiform; pro- 

 sternum (including middle of antecoxal part) setigero-punctate;. 

 intercoxal part of mesosternum sparsely setigero-punctate; meta- 

 sternura setigero-punctate behind the transveise suture; inter- 

 mediate and posterior coxse plurisetose, posterior trochanters 

 reniform, short, obtuse at apex, plurisetose. Black; head, pro- 

 thorax, and undersurface nitid; elytra opaque, base and scutellum 

 nitid, lateral margins (including ninth interstice) nitid and seriate- 

 punctate on inner side. 



Head thick, convex, slightly inflated behind and below eyes; 

 frontal impressions wide, deep, short; eyes small, round, convex, 

 not inclosed beliind. liabrum rounded, sexsetose. Clypeus 

 lightly emarginate; about six irregularly placed setigerous punc- 



