68 Mr. Arthur M, Lea's Bevision of the 



which have longer rami, though not so long as in togatiis] 

 which species it very closely resembles but can be readily 

 distinguished from it by the sculpture of the prothorax (3- 

 areolate in dichrons, 7-areolate in togatus). 



Hah. W. Australia : King George's Sound. 



Metriorrhynchus irregularis, Wat. {Porrostoma), 

 Trans. Ent. Soc. Lond., 1877, p. 76, PI. I, hgs. 18-18a ; 

 111. Typ. Col., p. 46, PI. XI, fig. 8. 



There are three specimens which I refer to this species; 

 they are however all rather larger (4^ to 5 lines) than 

 the type (3 lines), but in other respects agree exactly 

 with the original description and figures, and as so many 

 species of the genus vary in size the difference in length 

 may be of no importance. 



In general appearance these specimens closely resemble 

 small ones of lateralis but differ in the considerably shorter 

 rostrum * and shorter and differently formed antennae. 



Hab. E. Australia : Mackenzie River f ; Queens- 

 land : Brisbane ; N.S. Wales : Gosford, Sydney. 



Metriorrhynchus fuscolineatus, Wat., 111. Typ. Col., 

 p. 47, PI. XII, fig. 4. 

 Porrostoma lineatum, Wat. (?i. pr.), Trans. Ent. Soc. 

 Lond., 1877, p. 78, PI. I, figs. 45-48. 



laetus, Blackb., P. L. S., N.S.W., 1891, p. 526. 



The type of this species was recorded from N.W. 

 Australia, and a second specimen from Tasmania. Think- 

 ing it possible that laetus was identical I sent a specimen 

 to Mr. Griffith of Adelaide asking him to have it com- 

 pared with the type of laettcs, 1 also sent an exactly 

 similar specimen to Mr. Waterhouse, asking for it to be 

 compared with the type of fuscolineatus. Mr, Griffith 

 wrote as follows : — " Your specimen was duly handed to 

 Mr. Blackburn, who says he sees no particular difierence 

 and is quite agreeable to call it a colour variety of M. 

 laetus. One point in colour is that your specimen has 

 the tops of the elytral carinae yellow, whilst in the type 



* Another similarly coloured species has practically no rostrum, 

 but the only specimen I now have is not in condition to be described, 

 t I am iinable to find this river on the map. 



