494 ENTOMOLOGICAL NOTES, 



bright golden lustre ; the head is porrected, and narrower than the 

 prothorax ; the mandibles exserted, curved, very strong, and 

 about half the length of the head ; the entire face is deeply sunk, 

 so as to resemble a large fovea ; the eyes are elongate, below the 

 antennae they are considerably dilated, above they are narrowed 

 and nearly approach on the crown of the head, where we find 

 immediately between them a very deep impression ; the prothorax 

 is rather narrowed anteriorly, it is irregularly wrinkled, and has 

 two transverse sulci near its anterior, and two near its posterior 

 margin ; the inner sulcus of the anterior pair is rugose, diffuse, 

 and ill-defined ; the scutellum is small and rounded posteriorly ; 

 the elytra are ample, the shoulder prominent, but without spines 

 or tubercles, and the sides are nearly parallel, yet approach 

 towards the apex, where each is rounded, yet terminated interiorly 

 by a minute tooth. 

 This enormous insect inhabits Hindostan. It has been 



kindly lent to me by the Rev. F. W. Hope, in whose splendid 



collection are several specimens. 



Genus. — Pachydissus, Newman. 



Instrumenta cibaria fere Cerambycis : caput porrectum, prothorace 

 angustius : antennae corpore vix longiores, 11-articulatae, articu- 

 lus P^ mediocns ; 2"'. brevissimus ; 3"'. et 4"% apice valde in- 

 crassati, pyriformes, cetera gracilia ; prothorax antice angustior 

 medio utrinque 1-dentatus ; elytra linearia, apice 2-spinosa, spina 

 exterior longior. 



Pach. sericus. Totus sericus, hrunneus, antennis pedibusque 

 pallidioribus ; fades trifariam profunda impressa ; frotliorax 

 rugose rugatus ; scutellum parmm, rotundatum. (Corp. long. 

 1 unc. ; lat. '25 unc.) 



Entirely covered with a silky pubescence, brown, the antennae and 

 legs being somewhat paler : the third and fourth joints of the an- 

 tennae are remarkably incrassated towards their apex ; the face has 

 a deep impression, it extends three ways, laterally on each side 

 towards the eyes, and upwards towards the crown of the head ; 

 the prothorax is rugosely wrinkled, and has an obtuse tooth on 

 each side near the middle, also two raised transverse lines adjoin- 

 ing its anterior and posterior margins : the elytra are linear, and 

 terminated by two sharp spines, whereof the exterior is the 

 longest. 

 Inhabits New Holland. A single specimen, presented by 



Mr. Imeson, was taken by that gentleman at Woodside, near 



Sydney. 



