6Y A. M. LKA. 579 



The elytral markings are identical on the three specimens 

 under examination, but the deforce of infuscation of the sides of 

 the prothorax varies. The abdominal lamellae are small, and 

 usually concealed by the legs. 



Table of the 8pecies of Oomda. 

 A. Elytra uniformly dark. 



a. Elj'-tra purple puJdiripennis. 



aa. Elytra not purple eUiptica (partim). 



AA. Eh^tra dark, each with one pale spot. 



h. The spot sharply defined, and transverse coccintlhidtf<. 



hi). The spot less sharplj^ defined, and rounded. 



c. An infuscate stain on pronotum adjacent to scu- 



tellum eUlpttca (paitini). 



cc. Without such a stain himaculata. 



AAA. Elytra not as in A or AA. 



B. Elytra with a large, black spot surrounding scu- 



tellum fn'maculata. 



BB. Elytra with a transverse, isolated spot close 



behind scutellum distincta. 



BBB. Elytra either immaculate, or with markings not 



as in B or BB rariabUis. 



Geomela lamellifera, n.sp. 



Blackish or piceous-brovvn, with a slight metallic gloss; the 

 appendages somewhat paler, but not strikingly so. 



Hpjid with numerous, distinct punctures ; with two, small, 

 round fovej« in front. Antenna? rather long, first joint stout, its 

 apex subgiobular, third as long as fourth and fifth combined, 

 eighth feebly, ninth and tenth moderately transverse. /'/-o- 

 thorax more than thrice as wide as long, base gently rounded; 

 punctures much as on head but not quite so dense, and absent 

 close to the margins. Elytra with sides gently rounded, and 

 subcontinuous with those of prothorax; with regular rows of 

 fairly large punctures; interstices densely and minutely punctate. 

 Intercoxal process (A prosteriium rather feebly elevated in front. 

 Abdomen with basal lamellje, each with a conspicuous, acute pro- 

 cess, projecting obliquely backwards almost to apex of segment. 

 Length, 2\ mm. 



llab, — W.A.: Beverley, Pinjarrah(A. M. Lea). 



