of some new Lamellicorn Coleoptera. 63 



dentatis. Totum corpus supra atro-violaceura, subtus nigrum . 

 Clypeus antice excavatus, postice cornutus, cornu elongate ; 

 posteriori parte capitis protenso, antice abruptti truncato. 

 Thorax elytris latior, sublente subtilissim^ punctatus. Elytra 

 glabra, nitida, vix striato -punctata. Corpus infra nigrum, 

 femoribus et tibiis miniatis, tarsis geniculisque nigris. 

 Long. lin. 13, lat. lin. 7. 



This insect I lately received from my friend Dr. Cantor. It 

 was taken in the territories of Assam. It approaches in its cha- 

 racters Tiig. Hardwickii. The clypeus has only one horn. It is 

 considerably broader, and probably might by some be thought to 

 be a female of the above species. It is, however, quite distinct. 

 Many specimens are in the collection made by Mr. Griffiths. 



Rh. Hyacinthina, Hope. 



Corpus supra nigrum, clypeo purpurascenti ; infra atrum; pec- 

 tore, femoribus et tibiis violaceis seu hyacinthinis, tarsisque 

 atro-piceis. 



Clypeus violaceus, antennis piceis,lamellis externis pallidioribus. 

 Thorax sparsim punctatus. Scutellum fere glabrum. Ely- 

 tra crebrissime punctulata. Corpus infra nigrum, nitidum ; 

 femoribus et tibiis hyacinthinis, punctatis et pilosis. 



Long. lin. 13, lat. lin. 6|. 



It inhabits Assam. It is difficult to describe accurately the 

 colour of the above insect, which is a blue, evidently inclining to 

 a purple or violet. I have consequently called it Hyacinthina. 



The spines on the posterior tibiae are unusually small, when 

 compared with other species belonging to this genus. 



Rh. distincta, Hope. 



Affinis R. Mellii, at minor. Corpus supra viride, subtus con- 

 color, segmentis abdominis postice nigricantibus, femoribus 

 et tibiis laete viridibus tarsisque nigris. Caput viride, oculis 

 nigris. Thorax sparsim et subtilissime punctulatus. Scu- 

 tellum glabrum, impunctatum. Elytra crebrissime punctu- 

 lata. Corpus infra viride, nitidum, pectore opalino colore 

 tincto. Femora cum tibiis laete virescentia tarsisque atris. 



Long. lin. 14, lat. lin. 6|. 



Habitat in Assam. 



The above insect is closely allied to R. Mellii in size, form, 



