732 NEW SPECIES OF AUSTRALIAN COLEOPTERA, xiv., 



^«6.— Queensland: Cape York (H. Elgner).— Northern Terri- 

 tory: Darwin (N. Davies). 



Seen directly from behind, the tips of the elytra appear to 

 enclose the tip of the abdomen, and each to have a short semi- 

 upright process at the suture. On one specimen there is a con- 

 spicuous carina on the prosternum extending from the left eye 

 to the middle of the intercoxal process, but it is accidental, as it 

 is not represented on the right side, and is absent from two other 

 specimens. 



Arisocephalus, n.g. 



Head wide, antennary sockets large and moderately close 

 together, clypeus sinuous in front, its edge finely carinated. 

 Antennse v^ariable. Prothorax moderately transverse, basal 

 angles not very long but acutely carinated. Elytra subparallel- 

 sided, with a wide epipleural enlargement from base to hind 

 coxae. Prosternum with a conspicuous carina marking the suture 

 on each side from front coxa to level with middle of eye, pro- 

 pleural triangles bounded externally as well as internally by a 

 conspicuous carina. Metasternum with episterna rather narrow 

 and parallel-sided for some distance, but dilated posteriorly. Ab- 

 domen with fifth segment about as long as the two preceding com- 

 bined. Hind coxce (except for an incurvature at trochanters) 

 almost parallel-sided from inner to outer margins; tarsi com- 

 pressed, fourth joint small and feebly produced on lower surface, 

 claws each with an obtuse basal swelling. 



In Blackburn's Table, this genus would be associated with 

 Microrhagus and Entomophthalmus, but the propleural triangles 

 (instead of parallelograms) and prosternal sutures not sulcate, 

 make it certain that the genus is not even close to these. The 

 tricarinated clypeus of two of the species is suggestive of affinity 

 with Ainsus, but that genus has prosternal lateral sulci, and 

 metasternal sulci; the general outlines, however, and especially 

 the head, are much the same. The propleural triangles are 

 without the least traces of longitudinal sulci, but are gently 

 concave, or flat throughout; the carina marking the prosternal 

 suture touches the front margin inwards of the point where the 

 marginal carina touches it, instead of meeting it there as on most 



