Australian and Tasmanian Cryptocephalides. 411 



longitudinal impression. Antennte long, passing apex of body, 

 second joint less than one-third the length of third, third and fifth 

 subequal and distinctly longer than fourth, fifth suddenly thickened 

 at apex, seventh — tenth wide, the serrations of the joints reversed 

 after the seventh, eighth largest of all, tenth obtusely curved at 

 apex, eleventh strongly incurved at apex. Prothorax with large 

 punctures of irregular size and irregularly distributed ; oblique 

 impressions feeble ; margins narrow ; each side at apex suddenly 

 and rather deeply constricted so that the anterior angles project out- 

 wards. Scutellnin transverse ; with scattered punctures ; base entire 

 and not much wider than apex. Elytra elongate-oblong, sub- 

 humeral lobes very small ; with fairly large punctures becoming 

 seriate in arrangement and with irregularly convex interstices 

 apically, elsewhere with transverse rugulosities. Pygidinm very 

 indistinctly ridged. Apex of prosteniiim wide and almost truncate. 

 Intermediate segments of abdomen strongly incurved to middle, 

 across which the fourth is just traceable, fifth of irregular shape 

 with a deep transverse impression bounded by a ridge on each side ; 

 first with a transverse, tuberculiform, slightly bent elevation. 

 Length 5 mm. 



Rab. Queensland : Brisbane (Macleay Museum). 



The pygiUium and parts of the abdomen are more or 

 less deeply stained with brown. The transverse rugulosi- 

 ties extend much closer to the apex than usual, about the 

 middle each extends almost across the entire width of the 

 elytron. 



Tliis and the following species are allied to Cr. hiha- 

 m.atus, Chp., all three having very remarkable antennae 

 and abdomen in the males. The abdomen is very peculiar, 

 the transverse tubercle of the first segment appears like a 

 short, suddenly elevated, sloping carina; the apical impres- 

 sion (which is partially obscured at the base by long hairs 

 belonging to the intermediate segments) is as large as the 

 fovea in many females. In the male of rufoterminalis, 

 n. sp., the tubercle is subacute, the fourth segment appears 

 on each side as a triangular wedge and the impression on 

 the fifth is Inrge and subtriangular. In the male of hiha- 

 mat'us, the tubercle on the first segment is longitudinal and 

 very distinctly bilobed at apex, the fourth segment appears 

 as a wedge on each side (narrower than in the following 

 species) and the apical impression is of a very irregular 

 triangular shape. These three species form a very natural 

 and highly interesting group. 



