the Coleopterous Genus Dipliucephala. 227 



There are many other minor points of distinction, but enough has 

 been said to render it easy to identify the species. The only speci- 

 men I have seen being a male, I have, of course, compared with it 

 the males of others only. 



Sp. 16. D. PYGM^A. 



D. viridis, pilis albis decumbentibus : tibiis anticis bidentatis : 

 capite thoraceque j^unctulatissimis : scutello triangulari, fovea 

 excavato, j^unctulatissimo ; tarsis cyaneis. 



Long. Corp. 2 lin. 



In Mus. D. MacLeay, 



This is the smallest species of Diphucephala I have examined, be- 

 ing less than either D. Spencii or D. purvula : it is of a rich green 

 colour, but not glossy. In the male the clypeus is rather narrow, 

 and recurved, not very deeply emarginate : the head and thorax are 

 shagreened, exhibiting, under a strong lens, very delicate punc- 

 tures ; the latter (which is rather broad) has a shallow dorsal chan- 

 nel, which is divided posteriorly by an indistinct elevated ridge ; the 

 lateral fovese are large, and tolerably deep ; the thorax in the female is 

 more distinctly, although very finely, punctured. The scutellum has a 

 large impressed fovea towards the posterior part, which is very finely 

 punctured. The sculpturing of the elytra is more delicate than in 

 the allied species D. Spencii and D . parvula ; the two usual elevated 

 longitudinal striae on the disc of each elytron are tolerably distinct. 

 The anterior tibiae are bidentate ; the tooth-like processes are of a 

 pitchy red colour, and so are likewise the claws. The whole of the 

 upper surface is furnished with white or yellowish decumbent hairs, 

 which are rather thickly disposed. 



The specimens examined are from New Holland. 



DESCRIPTION OF THE FIGURES. 



Plate XXII. 

 Fig. I. Diphucephala sericea. 

 a a, Mandibles of do. 

 h, Maxilla. 



c, Labrum. 



d, Mentum. 



e, Antenna. 

 /, Hind leg. 



g, Anterior tarsus and apex of tibioe. 



2. Anterior tibia of Diphucephala Hopei. 



3. Do. do. of D. splendens. 



4. Claws of anterior tarsus of female, D. Hopei. 



5. Do. do. of male. 



6. Anterior tibia of D, pilislriata. 



