420 REVISION OF THE AUSTRALIAN CURCULIONID^, VIII., 



suddenly) wider than ]>rothorax, base trisinuate. Pectoral canal 

 deep and narrow, terminated between intermediate coxae. Meso- 

 sternal receptacle feebly raised, U-shaped; slightly cavernous. 

 Metasternmn about three-fourths the length of the following seg- 

 ment; episterna rather wide. Abdotnen with the 1st segment as 

 long as 2nd and 3rd combined, intercoxal process rounded, apex 

 slightly incurved; 3rd and 4th drawn slightly backwards at 

 sides, their combined length slightly more than that of 5th and 

 less than that of 2nd. Legs rather short; femora feebly ridged 

 and dentate but not grooved, posterior not extending to apex of 

 abdomen; tibiae compressed and lightly curved; tarsi normal. 

 Oblong-elliptic, moderately convex, squamose, winged. 



The genus differs from Cryptorhynchus principally in the 

 elytra, abdomen, and tibiae. It is closely related to the New 

 Zealand genera Tychanus and Sympedius; from the former it 

 mav be distinguished by the U-shaped mesosternal receptacle and 

 the comparatively long metasternum; from the latter by the 

 insertion of scape and the curved tibiae. Mr. Pascoe describes 

 the femora of Sympedius as unarmed, but in vexatus they are 

 comparatively strongly dentate, although the teeth are not visible 

 from in front; even from behind in testudo the anterior femora 

 may be seen to be minutely dentate. Mr. Pascoe compares both 

 genera with Acalles, a genus with which they have few characters 

 in common. 



Rostrum distinctly wider at base than at apex albi/rons. 



Rostrum no wider at base than at apex ohliquifasciatiim. 



Sy]vjpediosoma albifrons, n.sp. 



Pi-eddish-brown. Densely clothed with soft mouse-coloured 

 scales (paler and smaller on elytra than on prothorax); apex of 

 prothorax with a large transverse patch of svhite scales; elytra 

 with a moderately distinct median fascia of white scales and a 

 scarcely traceable one posteriorly, between them two very feeble 

 dark fasciae. Under surface with dense, rouud, soft, pale scales, 

 denser on metasternum than elsewhere; legs feebly variegated. 

 Head and base of rostrum with dense mouse-coloured scales. 



