Longicornia Malayana. 297 



Covered with a short silky pubescence, varying according to the 

 light ; head and prothorax yellowish-grey, with few punctures, 

 none on the vertex ; the prothorax with a slightly elevated median 

 line; scutellum semicircular; elytra irregularly punctured, the 

 pubescence greyish, with irregular patches, brown or silvery 

 according to the light, the apices slightly obliquely truncate, the 

 external angle forming a very short but distinct tooth ; body 

 beneath and legs with a close yellowish-grey pile ; antennse three 

 or four times as long as the body, reddish-brown with a short 

 greyish pubescence, the scape moderately thickened upwards. 



Length 10 lines. 



A specimen from Aru, which may be the female, differs 

 in having a much less silky pubescence, and the apices of the 

 elytra show no vestige of a tooth. I have seen a similar spe- 

 cimen in the British Museum, ticketed " iJ/. holotephrus, Bois.," 

 but that author describes the prothorax as having " plusieurs 

 rides transverses," and the description is in other respects 

 dubious. 



Monochamus convexus. 



M. piceus, pube opaca grisea tectus ; elytris convexiusculis, 

 leviter punctatis, apicibus sub-sinuatis, angulis suturali et 

 exteriore paulo productis. 



Hah. — Kaioa. 



Pitchy-brown, with an opake grey pubescence ; head rather 

 broad in front, the eyes less approximate, the vertex impunctate ; 

 prothorax very short and transverse, a slight prominence on the 

 centre, a few punctures behind it almost obsolete ; scutellum 

 nearly semicircular ; elytra rather more convex than usual, finely 

 punctured, the apices somewhat broadly sinuate, each angle a 

 little produced ; body beneath and legs pubescent, slightly silky, 

 greyish ; antennae pubescent, greyish, nearly twice as long as the 

 body ($), the scape much thicker towards the apex. 



Length 12 lines. 



3fonochamus viator. 

 M. rufo-brunneus, pube griseo-mutante tectus; elytris apicibus 



oblique truncatis, angulo exteriore obtuse producto ; antennis 



pedibusque testaceis. 

 ^a6.— Matabello. 



Light reddish-brown, with a thin short greyish pubescence 



