1893.] 255 



Hah. : W. Australia, Port Darwin, Cape Leeuwin, E. Wallaby 

 I. in the Houtmann's Abrolhos Group, Cassini I., Baudin I., and 

 Adele I. 



Pound in plenty at Baudin and Adele Islands, more sparingly 

 elsewhere. Allied to T. ciliaris, but narrower ; the elytra more finely 

 and delicately punctate-striate on the disc, the outer striae (the ninth 

 excepted) obsolete or very indistinct ; the interstices flat throughout ; 

 the under-surface and the epipleurae more finely punctured ; the 

 propleurae almost smooth ; the marginal cilise sparser. Much smaller 

 than T. aphodioides, with the prothorax shorter, the elytral striae more 

 finely and lightly punctured, and the marginal cilise less dense. Spe- 

 cimens of this and of T. ciliaris were found by Mr. Walker under 

 seaweed and stones on sandy beaches, at or just below high-water 

 mark. 



Trachtscelis pallets, n. sp. 



Short-ovate, testaceous or flavo-testaceous, shining, the ventral segments usually 

 more or less piceous ; the marginal cilisB fine and sparse, Head and prothorax im- 

 punctate ; elytra short, finely striate throughout, the strise becoming deeper towards 

 the suture and with exceedingly fine closely placed punctures, the interstices feebly 

 convex on the disc, flat at the sides, smooth ; beneath, densely, finely punctate, the 



middle of the metasternum and the propleurra almost smooth. 



Length, 2i — 2| mm. 

 Hah. : Ceylon, Colombo. 



Numerous examples. Smaller and shorter than T. aphodioides, 

 Latr., and testaceous in colour (the ventral segments excepted) ; the 

 elyti'al strise distinct throughout, and exceedingly finely punctured ; 

 the marginal cilias sparse.* 



Horsell, Woking : 



September, 1893. 



ON THE GENUS MECEDANUM, ERICHSON. 

 BY DR. D. SHARP, M.A., M.B., F.R.S. 



The name Mecedanum was proposed by Erichson about fifty years 

 ago, in a note on p. 274, " Naturgeschichte Ins. Deutsch.," iii, but no 

 species has, so far as I am aware, ever been described. Some fifteen 

 years ago I obtained a specimen from Mr. Cowan that I have little 

 doubt belongs to the genus. As it is a highly remarkable form, of 

 great interest in the classification of the Colydiidce, I think it well to 

 describe the species, and complete the extremely brief generic charac- 

 ters mentioned by Erichson. 



* Mr. G. Lewi.s informs me thy.t he has also taken T. palltns at Colombo, and that he has a 

 species from Japan which he proposes shortly to describe. 



