1919.] 



267 



AxTURi lii I) \i:. 

 Itychoderes I'iiyafHs Fahr. — Caiije Creuk, Hcrljice. 

 P. viridanus Boh. — Puruiii R. 

 P. callosus Jek. — Mazavuni R. 



Ceeambtcidae. 



Macrodontia cervicornis Linn. — This powerful beetle is of fairly 

 common occurrence. It is known locally as the "Sawyer Beetle," owing 

 to its observed habit of clasping a 3^oung growing twig of about 1 inch 

 in diameter with its mandibles, and then, still retaining its grip, gyrating 

 .swiftly round and round till the twig is severed. The noise thus pro- 

 duced is characteristic and easily recognised again when once heard. 

 Its object in this performance is obscure. The larva has been success- 

 fully reared within the decaying trunk of a coconut palm. Occurs both 

 on the coastlands and also in the interior. 



MctUodon sjnnihai'he Linn. — A rare species. Liberty Island, Esse- 

 (]uil)() K., and Onderneeming, Essequibo. 



Clilorida festiva Linn. — Of common occurrence. At times injures 

 the bark of Hevea rubber trees. 



Orfliomegas cinnamonens Linn. — Widely distributed. The larvae 

 on one occasion were found boring into the dead and dry stem of a 

 Hevea rubber tree. 



Callichroma suturale Fabr. — Paraweeka Ck., Essequibo R. 



C. viftatum Fabr, — Onderneeming, Essequibo coast. 



Tracliyderes succiiictus Linn.^ — Occurs all over the Colony. Tlie 

 adults may frequentl}^ be seen during the daytime feeding on the sweet, 

 sticky secretion of the flowering heads of Para grass. This beetle takes 

 readily to flight and is as active in the daytime as at night. 



T. melas Boh. — Paraweeka Ck., Essequibo R. 



Ebiii-odacrys sulphureosiijnata Er. — A widely distributed forest 

 sj)ecies. Attracted to artificial lights. 



Pyoioutorphus centroliiiputus Bates. — Occurs freijuently within 

 the forest area. 



Colohothea unnulata Fabr. — Rockstone, Essequibo R., and Deme- 

 rara R. 



C, poecUa Germ. — Essequibo coast. 



C. li)ii(/)iata Bates. — Paraweeka Ck., Essequibo R. 



2a2 



