new Wood-boring Beetles. 3S3 



Some specimens lately received from Mr. Green from 

 Ceylon as attacking Alhizzia moluccana and Hevea brasili- 

 ensis were found, I understand, in the Botanical Gardens, 

 and therefore their country of origin must remain in doubt. 

 Out of ten specimens found by Mr. Green in a dead branch 

 oi Alhizzia moluccana, one proved to be E. sexspinosus (c?), 

 Motsch., and the remainder Xyleborus asperatus, Bldf., an 

 insect of similar sculpture and general form. It seems 

 therefore highly probable that these may be the sexes of the 

 same species. 



Cnestus, gen. nov. 



Caput rotundatum, obtectum ; oculi transversi ; antennae scapus 

 longus, funiculus 4-articulatus, articulis 2-4 transversis, lati- 

 tudine crescentibus ; clava magna, ovalis, oblique apice truncata. 

 Prothorax quam elytris longior, ultra caput productus et 

 tuberculis multismagnis ornatus. Scutellum parvum. Elytrorum 

 disco pallido. Abdomen normalls. Coxa3 antice ajiproximatse ; 

 f(;mora palUda ; tibia3 fuscso, antice extus serratae, a basi au- 

 trorsum dilatatae et oblique truncatse ; tarsi elougati. 



The prothorax is continued anteriorly downwards and 

 then upwards beyond the head, and is edged with a series of 

 large tubercles. The elytra are almost transparent, except 

 at the edges and along the suture, Avhere they are very dark 

 in colour. 



That the immaturity of the elytra is only apparent seems 

 to be proved by the appearance of the other parts of the 

 insect. 



I have been unable to dissect the mouth-parts owing to 

 scarcity of material. 



Cnestus magnus, sp. n. 



Oblongo-ovalis, nitidus, niger, elytris (marginibus exceptis) pal- 

 lidis ; thorace antice granulato-asperato et instructo tuberculis 

 octo, postice profunde punctate ; elytris subtilissime punctato- 

 striatis ; striis juxta suturalibus fortiter punctatis ; corpore toto 

 sparsim hirto. 



Long. 3 mm. 



Hab. ? Ceylon. 



This insect was taken by Mr. Ernest Green from living 

 branches of Alhizzia moluccana. The prothorax is longer 

 than the elytra by the length of the overhanging apical 

 portion, strongly asperate and tuberculate in front, and 

 posteriorly covered with large punctures somewhat widely 

 separated, the intervening spaces being very shiny; there is 



