62 Mr. Arthur M. Lea's Revision of the 



of the two, and I have named it hasifiavus. Macleay did 

 not mention the scutellum but in amjpliatus it is flavous, 

 a character which readily distinguishes it from longicornis 

 (which otherwise is almost identical in colour). The colour 

 of its upper sui'face is also almost identical with Tricliahts 

 scmiatratus. As an instance of how deceptive colours are 

 in this sub-family, a short table of these four species, which 

 have the prothorax and base of elytra of almost identical 

 colour, is here given : — 



Subsutiu'al costa trifurcate near base . . T. semiatratus, n. sp. 

 Subsutural costa simijle. 



Elytral punctures in single series . . . M. hasifiavus, n. sp. 

 Elytral punctures in double series. 



Prothorax 7-areolate M. longicornis, Macl. 



Prothorax 5-areolate M. ampliatus, Macl. 



In ampliatus the five areolets are not as in Xylohamis 

 costifer and gratiostts (the only species figured by Water- 

 house * as having the prothorax 5-areolate), but there 

 is a costa extending from the central areolet towards the 

 margin on each side, so as to divide the four outer areolets 

 into almost equal sizes ; these all being slightly transverse 

 (in costifer and gratiosus there are two small ones in front 

 and two much larger ones behind). The median areolet 

 is much as in many species of Trichalus, but as the sutural 

 costa is simple it cannot be referred to that sub-genus, in 

 which there is already an ampliatus. Waterhouse would 

 probably have referred it to Synclwnoius. 



One specimen before me differs from the type in being 

 much smaller (2i- lines only), but I can discover no other 

 distinguishing feature. 



Hah. Queensland : Barron River, Cairns. 



Metriorrhynchus testaceicollis, Macl. {Cladophor^is), 

 I. c, p. 234. {Figs. 21, 22.) 

 Under this name also Macleay had confused two species. 

 The specimens that were standing under that name in the 

 Macleay Museum are almost identical in colour, one being 

 slightly more, the other slightly less than three lines 

 in length. Both specimens have also the "antennae 

 with the branches from joints 3 to 10 very much longer 

 than the joints themselves" ; with the rostrum practically 



* 111. Typ. Col., Plate IX. 



