310 Mr, G. R. Waterliouse's Descriptions 



XLV. Descriptions of the Species of the Curculionideous 

 Genus Pachyrhynchus, Sch., collected hi/ H. Cuming, Esq., 

 in the Philippine Islands. By G. R,. Waterhouse, Esq., 

 V.P.E.S. 



[Read 1 March, 1841.] 



Sp. 1. Pachyrhynclius venustus, Waterh. 



Niger, Isevis ; capite niaculd una inter oculos ; thorace maculis 

 duabiis supra, maculaque una ad utrumque marginem, 

 elytris viginti-duabus ovatis ornatis ; his e squamft auratis, 

 vel aureo-cupreis, efFectis. 



Var. |3. DifFert elytris maculis octodecim ornatis. 



Var. y. Differt elytris maculis sexdecim ornatis. 



Long. Corp. 10| — 7| lin., lat. 4^ — 3 lin. 



This is the largest species of Pachyrhynchm I am acquainted 

 with : its form is more elongated than that of P. moniliferus. 

 The body is black and very glossy ; on the legs there is often a 

 slight bluish or purplish tint. The rostrum has an oblong shallow 

 depression, commencing at the base and becoming deeper, and 

 terminating in a transverse line opposite the base of the antennae ; 

 it is very delicately punctured. The thorax is equal in length and 

 width, and less swollen in the middle than in P. moniliferus; 

 numerous very minute punctures are observable on the upper 

 surface. The elytra are about one-third broader than the thorax, 

 of an elongate -ovate form, and exhibit neither striae nor punc- 

 tures. The metallic spots are disposed as follows : — one between 

 the eyes, and one on each side under the eye ; a tolerably large 

 oblong spot on each side of the upper surface of the thorax, and 

 a broad longitudinal mark on the side near the insertion of the 

 legs. On the elytra the number of spots varies from sixteen to 

 twenty-two, and those which I believe to be the males generally 

 have less than the females ; in all the specimens there are two 

 spots on the suture, one on the middle of the elytra and one 

 between this and the apex ; on the outer margin of each elytron 

 is a large oblong spot at the base, a second behind the middle, 

 and a third extending nearly to the apex — these two last spots 

 sometimes join ; at the base of the elytra are two oblong spots 

 placed one on each side and at a short distance from the suture ; 

 besides these are four round spots, two on each elytron, situated 

 about midway between the suture and the outer margin and nearly 



