10 

 COLEOPTERA. 



Donovan, in order to admit this species into the genus Paussus, was induced to 

 adopt the Linmean generic character, with the omission of the term « clava solida 

 although, according to the characters laid down by Afzelius, it ought not to be 

 admitted into the genus, since he states that the tarsi are only three-jointed, whereas 

 in the other species they are five-jointed. They are however four jointed, but m con- 

 sequence of the more important variation in the structure of the mouth, which 

 Donovan neglected to examine, I considered it requisite to establish this species as a 

 distinct genus. 



PATJSSUS THORACICUS. 



Plate V. fig. 2. 



Genus. Patjssus, Linnceus. Pausus, Donovan. 



Species. Paussus Thoeacicus : ferrugineo-testaceus ; elytris disco lateribusque fuscis : 

 antennarum clava oblonga, compressa trigona; latere interno acuto, externo 

 excavate- ■ cavitate ovali marginibus denticulatLs. Long. Corp. lin. 3J. 

 Paussus : pale reddish ; the elytra having the disc and sides brown ; the club of the 

 antenna? oblong, compressed, and triangular ; the inner margin acute, the ex- 

 terior excavated, with an oval cavity, the margins being denticulated. Length 

 3 J lines. 

 Syn. Paussus thoracicus, Westwood in Trans. Linn. Soc. vol. XVI. p. 640, pi. 33,/! 28 — 30. 

 Pausus thoracicus, Donovan Ins. Ind. 1st edit. 



Paussus trigonicornis, Latr. Gen. Gr. &c. 3. p. 3, pi. 11,/. 8. Sch. Syn. Ins. 1. p. 3, 

 pi. 9. 

 Habitat. Bengal. 



The thorax in this insect is so deeply divided across the middle, that it appears, 

 at first sight, as if it were really two, whence the specific name thoracicus. The same 

 character also exists in P. Fichtelii, which Donovan considered might possibly be the 

 other sex of P. thoracicus ; the most striking difference prevailing in the structure of 

 the antennse, the excavation in one of which is of an oval, or rather shuttle shape, 

 and in the other pyriform. In my monograph I have pointed out other characters 

 which have induced me to consider the two species as entirely distinct. 



