( 330 ) 



triangular tooth ; elytra broader than the thorax, punctate-striate, legs moderate, 

 tibiae simple, not sulcate, tarsi of nearly equal length, the third joint deeply bilobed, 

 claws separated, simple ; prostemum narrowly elongate, rather convex, mesosternum 

 subquadrate, dilated iiosteriorly, sulcate, first abdominal segment double the length of 

 the second at its middle portion. 



It is not easy to find the proper position for this genus, which .stands uni<jue in 

 the shape and structure of the thorax amongst the I'hytophaga ; the nearest allied 

 genus seems to be Macrolema Baly, likewise inhabiting Queensland. The thorax in 

 that genus is, however, (piite differently shaped, but .shows some afl^nity ; the anterior 

 coxae in the present geuus are likewise transverse. 



Macrogonus submetallicus sj). nov. 



Metallic dark blue, the head and thorax very sparingly punctured, the latter 

 deeply bifoveolate, dentate at the sides, elytra fulvous with a metallic gloss, rather 

 finely punctate-striate. 



Length 5i to 6 lines. 



Head broad, but slightly constricted behind the eyes, finely but distantly punc- 

 tured, with an elongate triangular depression extending upwards to the vertex, the 

 anterior portion of which is very deep, anterior margin of the clypeus concave at the 

 middle, oblique at the sides, labrum and jialpi liright flavous, antennae extending 

 beyond the middle of the elytra, opaque, dark purplish, the basal joint thick, metallic 

 blue, the third and fourth equal, one half longer than the second, the lower six joints 

 shining; the rest opaque; thorax about twice as broad as long, metallic blue, the 

 anterior margin straight, the posterior one broadly rounded at the middle, the sides 

 produced into a broad triangular large tooth, the sui-face with a deep fovea at each 

 side and a few rather deep punctui-es, the disc rather flattened, each angle furnished 

 with a single seta ; scutellum longer than broad, its apex rather pointed, metallic 

 blue or green ; elytra broader than the thorax, subquadrate, theajiex broadly roinided, 

 fulvous with a distinct metallic gloss, the .sides with a more or less distinct fovea at 

 the middle, the surface rather closely and finely punctiu-ed in not very regular rows, 

 the lateral margin thickened, imderside and legs metallic blue ; prostemum distinct, 

 elongate, rugose ; femora rather thickened. 



Hab. Queensland (Australia). 



In one specimen the antennae are rather shorter than in the other, but I see no 

 other characters to separate the sex, and am not certain in regard to the latter. 



