of the Species of the Genus Pachyrhynchus. 311 



equidistant from each other and from the foremost sutural spot ; 

 between the hindermost pair of the four spots just mentioned are 

 sometimes two other spots, which are either large and oblong or 

 small and round. On the under side of the insect a small spot is 

 observable between the anterior legs ; the raeso- and meta-sternum 

 have each a spot on either side, and on the base of the abdomen 

 are four spots. The legs have usually a small patch of scales on 

 the under side of the femur near its apex. The abdominal seg- 

 ments are very delicately and indistinctly punctured. 



Sp. 2. Pachyrhynchus nfo-ptmctahis, Waterh.* 



Niger, laevis ; capite maculis tribus ; thorace maculis duabus 

 supra, macuMque una ad utrumque marginem ; elytris viginti- 

 duabus ornatis, his maculis e squamis rufis effectis. 



Long. Corp. 8| lin. 



This species approaches most nearly to the P. venustus, but 

 differs in being smaller, of a less elongated form, and in having 

 the spots of a red, or pinkish red, colour, and very nearly destitute 

 of metallic lustre. Here the depression, which in P. venustus is 

 confined to the upper surface of the rostrum, extends backwards 

 between the eyes, so that in one species the forehead is distinctly 

 concave, whilst in the other it is flat or even slightly convex. 

 The elytra in the female of P. rufo-punctatus are shorter than in 

 P. venustus, rather less convex and more dilated in the middle. 

 The spots in these two species are disposed in the same manner. 



Sp. 3. Pachyrhynchus gemmalus, Waterh. 



Niger vel cupreus, laevis ; capite supra maculis duabus ; thorace 

 supra tribus, infra duabus, et elytris sexdecim (duabus apud 

 suturam) ornatis ; his maculis e congerie squamarum metallice 

 splendentium effectis ; squamis centralibus nitidc viridibus, 

 circumgirantibus aureo-rubris, et ind^ ocellos efficientibus. 



Long. Corp. 6| — 8| lin. 



Var. /3. Differt elytris maculis viginti-duabus ornatis. 



The general colour of this most beautiful insect is sometimes 

 black and sometimes of a most brilliant copper-like hue. The 

 spots are formed of metallic scales of various hues, but generally 



* Descriptions of four species of Pachyrhynchus, viz. P. mfo-piinctatus, 

 P.ehgans, P.concinnus, and P. latifasciatus, have been added to this paper since 

 it was read in March, 1841. These additional species were brought before the 

 Society in February, 1842, having been discovered in a portion of Mr. Cuming's 

 Philippine Island collection, which had been previously overlooked. 



