Phytophaga 3Ialayana. 69 



their apex, anterior angles acute ; basal margin very slightly 

 oblique and obsoletely bisinuate on either side, medial lobe 

 scarcely distinct, broadly truncate ; upper surface subcylindrical 

 in front, distinctly gibbose in the centre of the disc, obliquely 

 depressed at the base on either side just behind the gibbosity ; 

 whole surface closely covered with short linear impressions ; in 

 addition to these, placed transversely across the middle of the disc, 

 are a few small ill-defined tuberosities, visible only under a lens. 

 Scutellum large, triangular, its apex obtuse, surface smooth, the 

 medial line with an indistinct longitudinal ridge. Elytra scarcely 

 broader than the thorax, very slightly narrowed towards their 

 apex, dehiscent at their sutural angle; sides angularly lobed at 

 their base ; upper surface convex, thickened and subtuberculate 

 just below the apex of the scutellum ; each elytron with ten sul- 

 cate striae, each of which is impressed with a single- row of fine 

 punctures ; the striae run parallel to the lateral border on the 

 outer disc, but on the inner disc they are oblique and curve in- 

 wardly towards the suture ; interspaces broad, thickened and 

 convex, costate at the base, and on the outer disc raised here and 

 there into oblong callosities, those placed on the apical portion of 

 the elytron being much stronger and more prominent than those 

 on the middle disc. Pygidium closely punctured. Presternum 

 broader than long, its hinder margin truncate. The whole upper 

 surface of the body in this interesting species is covered with very 

 minute punctures, from which cause the body appears nitidous or 

 the reverse, according to the light in which it is viewed. 



Genus Cryptocephalus, Geoff. 

 Suffr. Linn. Entom. ii. p. 13. 



1. Cryptocephalus colon, SufFr. (PI. II. fig. 1.) 

 Linn. Entom. ix. p. 19. 

 Subquadrato-oblongus, postice attenuatus, valde convexus, 

 pallide flavo-fulvus, nitidus ; mandibulis, oculis, antennis (his 

 basi exceptis) scutelloque nigris ; elytris laete flavis, regu- 

 lariter punctato-striatis, interspatiis planis ; singulatim limbo 

 maculisque subrotundatis duabus, altera supra callum hu- 

 merale, altera pone medium disci medio posita, nigris. 

 Long. 2\ lin. 

 Hab. Tringanee, Siam. 



This pretty species has been sent from Tringanee by Count 

 Castelnau. 



