BY WILLIAM MACLEAY, F.L.S., (tc. 52 1 



Section I, 



Species of broadly ovate form, and largely expanded margins to 

 both thorax and elytra. 



6. Pterohelaeus Walkeri, Breme. 



Mon. des Cossyph. Part 1. p. 27, pi. II. fig. 4 ; Lac. Gen. Atl. 

 t. 54, f. 3. 



Nitid black, oval, slightly convex. Head faintly rugose, sub- 

 transversal, the lateral angles of the epicrauium raised and exserted, 

 the clypens slightly convex, and rounded on the sides, front 

 depressed, antenna about the length of the prothorax, that 

 rounded, strongly transversal, smooth, somewhat sinuated poste- 

 riorly, with the margin broad and flat, its anterior angles rounded 

 and reaching to half the length of the head. Elytra oval, slightly 

 dilated posteriorly, very nitid, the humeral region raised into a 

 knot, margins smooth, flat, as large as those of the thorax, but 

 narrowing behind. The disk of the elytra has nine raised longi- 

 tudinal ribs or lines, and in the interstices between these, two rows 

 of small impressed punctures, both the punctures and ribs becoming 

 almost obliterated towards the apex. Thighs dilated, the legs and 

 under surface of the body of a nitid blackish-brown. Abdomen 

 flattened, faintly longitudinally striated. 



Long. 25, lat. 16 millim. 



The above is a translation of De Breme's description of the 

 species. There are other species so resembling it in form and 

 sculpture, as to make a more detailed description very necessary, 

 biit I think it better to point out the distinctive features in the 

 difierent species as I arrive at them. I may mention one pecu- 

 liarity of all De Breme's descriptions, he invariably applies the 

 term " disque " to the margins of the thorax and elytra ; this I 

 have of course always corrected in my translations. 



Found under the loose bark of gum trees in all parts of New 

 South Wales. 



