706 EEVISIONAL NOTES ON AUSTEALIAN CABABID^f:, I., 



some forms still being striate (eg., Carenarchus),^ or with the 

 elytra punctate (Laccoscaphus);* while in the smoothest Carenums 

 faint, but distinct, rows of punctures may be brought out on the 

 elytra by a lengthened immersion in alcohol. If the elytra of 

 one of these smooth Carenums be detached and looked at towards 

 the light the presence of hidden honeycombed lines beneath the 

 smooth dorsal derm is disclosed. There is also reason to suppose 

 that the ancestors ©f the Carenums had many setigerous pores 

 along the lateral margins of the prothorax (e.g.^ Trichocarenum)^ 

 and on the elytra {e.g., the submarginal setigerous punctures in 

 some Scaraphites, Neocarenum and Trichocarenum). 



CHiETOTAXY {wUh Special reference to the Australian Pasimachides). 



In his ' Monograph of the Carabidse of the Hawaiian Islands,' 

 Dr. Sharp has attributed such a high importance to chsetotaxyt 

 for taxonomic purposes that some observations I have made on 

 this subject in the group Carenides may not be without interest. 

 In the first place it may be noted that in Dr. G. H. Horn's 

 monumental memoir on the Carabidse published in the year 1881, 

 the following set^e are noticed as worth}' of attention among the 

 Carabidae : — (1) The supraorbital setse of the head, (2) a seta near 

 the tip of the basal joint of the antenna? on the upper side, (3) the 

 lateral setae of the clypeus, (4) the set» of the anterior margin of 

 the labrum, and also (5) of the ligula, (6) a seta in the outer 

 scrobe of the mandibles, (7) the "post-dental" setie of the men- 

 tum, (8) the setie of the penultimate joint of the. labial palps, 

 (9) the lateral seta? of the prothorax, (10) the dorsal setae of the 



* The generic names Laccopternm and Epilectus now in use among the 

 Australian Pasimachides are preoccupied; LaccoacapJms and Carenarchus 

 are, therefore, proposed to replace them. 



+ *' From the chitinous skeleton there stand out hairs that in some cases 

 penetrate the chitin and are connected with a special nerve, thus forming a 

 simple but effective set of sense-organs. The description of the ways in 

 which these hairs are arranged is called chastotaxy." Dr. D. Sharp in 

 * Fauna Hawaiensis,' Coleoptera Caraboidea, Vol. iii. Pt. iii. p. 182. (Cam- 

 bridge, 1903). 



