656 Mr. J. O. Westwood on the Paussidce, 



longiori, laevi, tenuori, cylindrico, unguibus duobus. Ab- 

 domen elytris paul6 longius. 



I have considered myself warranted in regarding the charac- 

 ters of the Paussus denticornis of Donovan and its affinities as 

 indicative of a genus distinct from that of the true Paitssi, not 

 only in consequence of their dissimilar general external appear- 

 ance or habit, but also of the variation exhibited in the lower 

 parts of the mouth. 



The typical species appears to have been inserted in the genus 

 Paussus by Donovan with a feeling of suspicion, since he states 

 that, according to Afzelius's characters, it should not come into 

 that genus, the number of joints in the tarsi being only, as he in- 

 correctly states, 3 : whereas, in the other species, the tarsi are 5- 

 jointed, although, if not closely inspected, they appear 4-jointed. 

 The essential generic characters of the insect were however 

 omitted in Donovan's short specific description. 



Gyllenhal, in the Synonymia Insectorum of Schonherr, vol. i. 

 part 3 ; App. p. 14. tab. 6. fig. 1. (by a singular coincidence, 

 evidently arising from similarity of structure,) described and 

 figured a distinct species nearly allied to Donovan's P. denti- 

 cornis, under the same name. He, however, regarded it as a 

 true Paussus, and thus shortly described its trophi : " Os in- 

 flexum brunneum, palpis crassis, pilosis, conicis vel extrorsum 

 attenuatis," evidently without noticing the peculiar structure of 

 the latter organs. 



Dalman also in his observations upon the Paussus Bucephalus 

 mentioned above, regarded the P. denticornis of Gyllenhal as a 

 true Paussus, " Etenim in illo et in ceteris veris Pausis, Sec." 



From the true Paussi, however, these insects appear sufficiently 

 generically distinct ; since the flat, depressed body and thorax ; 



the 



