of Paussus lineatus and P. Parrianus. 461 



compared in P. Parrianus, added to the deep central cleft be- 

 tween the tubercles of the anterior portion. 



The difference noted in the colouring of the elytra of the two 

 species is immaterial, inasmuch as, in one specimen which I 

 possess, the elytra, instead of being black with a testaceous 

 border, are testaceous, with an elongate dark separate patch on 

 each wing-case; and in another example the dark portion is 

 nearly obsolete. 



We now come to a more minute survey of the important 

 clavse of the antennae; and if those of P. lineatus are imperfectly 

 and cursorily described, we shall find that the appliances of mo- 

 dern science have not sufficed to obviate certain omissions, and 

 that an incorrect idea of portions of the clava is afforded even in 

 the highly magnified extra figures of P. Parrianus. 



It is due to the distinguished entomologist to whom science 

 is so deeply indebted, and who has done so much to extend our 

 knowledge of this particular family, to observe that he was pro- 

 bably unwilling to injure specimens by detaching clavse in order 

 to examine them carefully from every point of view ; whereas, 

 after furnishing examples to his and some other cabinets, the 

 number of specimens still retained by me rendered such injury 

 a matter of less consequence, and conferred some advantages, 

 notwithstanding my limited experience. The pubhshed figure 

 of P. Parrianus is taken from a very small specimen. Some of 

 my examples are larger than the size assigned to P. lineatus. 



It is scarcely a subject for surprise that Thunberg should have 

 omitted to record the partial excavation actually found in P. 

 Parrianus, when the more apparent and determined navicular 

 cavity of P. thoracicus, Don., was passed over by Lamarck in 

 1817 : the whole of his description of P. trigonicornis, Latr., 

 was summed up in the short characters, " P. rubro-ferrugineus, 

 antennarum articulo secundo compresso trigono " ! It may be 

 objected that Fabricius, in describing Cerocoma lineata, wrote 

 " clava elougata integra." Had he actually examined a speci- 

 men, or judged merely from Thunberg's omission ? 



Thunberg made no attempt to describe the general form of 

 the clava, and contented himself with recording its breadth, 

 compression, obtuse summit, and the truncate base spined at its 

 exterior angle, — omitting the other characters, inclusive of the 

 parallel undate rugse on the upper surface, although a rude 

 attempt to represent them is evident in the figure. These rugse 

 are replaced, in the figures of P. Parrianus, by a series of mar- 

 ginal loops, which fail to give a correct idea of the character of 

 the sculpture ; and the ridges are not even alluded to in the 

 printed description in the ' Trans. Ent. Soc.,* although they 

 occupy such a large portion, and arc so consj)icuous on the 



