220 STUDIES IN AUSTRALIAN ENTOMOLOGY, 



Promecoderus LUCIDICOLLIS. 



P. lucidicollis, Casteln. I.e. p. 171 ; Putz. Revis. 1873, p. 335 ; 

 P. riverince, Macl. I.e. p. 331. 



Tu general appearanee very much resembling P. gracilis, Germ., 

 but larger. Shining, eolour varying from bronzy black to a 

 metallic green, antennae, except the tirst joint, fuscous. Head 

 smooth ; the clypeal suture distinct ; eyes prominent, inclosed 

 behind ; the post-ocular prominences not large. Prothorax sub- 

 cordate, a little wider than long (about 3| x 3f mm.), lightly 

 rounded on the sides, nari'owed, but not constricted behind ; the 

 median line deeply impressed. Elytra oval (7^ x 41 mm.), convex, 

 not narrowed at the shoulders, widest about the middle, the sides 

 subparallel, the stria next the suture entire, very faintly im- 

 })ressed, traces of others visible with a lens. Four ventral seg- 

 ments with very broad lateral fovete. Male with the joints of the 

 anterior tarsi triangular, less dilatate than usual; three first joints 

 of anterior, and two first of middle tarsi spongiose below. 



Length 11-13, breadth 3f-4^mm. 



Hah. — Melbourne ; Mulwala, Deniliquin, Murrumbidgee River, 

 New South Wales. A common and plentiful species. 



This species is very nearly allied to P. howitti, but is smaller 

 and narrower ; the broad lateral impressions of the ventral 

 segments also differ from the more sharply defined punctiform 

 ones of P. howitti. 



Promecoderus howitti. 



P. howitti, Casteln. I.e. p. 171 ; Putz. Revis. p. 335. 



This is the Victorian form of P. concolor, from which it is very 

 hard to find good specific distinctions. 



Colour shining bronzy black, with a metallic lustre, sometimes 

 of a greenish hue. Its form is less robust and convex than 

 P. concolor, and the elytra are more narrowed to the shoulders. 

 The metasternal episterna seem narrower. 



The following are the measurements of a specimen (^) from Mel- 

 bourne : — 



