the Australian Curculionidge. 415 



Acalles delirus. 

 A. ovalis, niger, opacus, supra squamis erectis adspersus ; rostro 

 antice puuetis magnis in seriebus quatuor dispositis ; antennis 

 ferrugineis ; clava ovata, obtusa ; pi'othorace longitudine latitudini 

 aequali, utrinque fortiter rotuudato, pone apicem baud coustricto, 

 apice ipso angustissimo, supra rude foveato, interspaliis nitide 

 granulatis, in medio linea clevata nitida instructo ; elj*tris pro- 

 thorace baud latioribus, subseriatim rugoso-punclatis, interstitiis 

 convexis, granulis nitidis, plurimis squamam albam emittentibus, 

 obsitis ; tibiis anticis baud, caeteris paulo compressis. Long. 2^ lin. 



Hah. Rockliampton. 



The species here refeiTed to Acalles appear to me to differ 

 in no respect generically from such of tlie European species as 

 I have examined. Thej are all dark brown or black, with 

 few scales ; and these, arising singly from punctures, are fre- 

 quently more or less erect and claviform or spatulate — common 

 characters among the Cryptorhynchinae. The rostrum is com- 

 paratively stout, as a rule perhaps a little shorter than the 

 prothorax, and always very perceptibly broader towards the 

 apex ; the first two abdominal segments are large and pitted 

 with very coarse punctures, each bearing a broad flat, or some- 

 times a naiTOw curved, scale. GurcuUo stupidus^ Fab. (Ent. 

 Syst. ii. p. 432), from the type in the British Museum, appears 

 to be referable to Acalles ; but its tibiae are much longer than 

 usual, and its posterior femora are toothed beneath ; in other 

 respects it is like A. hisignatusj but considerably larger. 

 Curculio luridusy Fab. (Ent. Syst. ii. p. 431), placed in Acalles 

 in the Munich Catalogue, is a Porapterus, Acalles ohesus^ 

 Boisd. (Astrol. ii. p. 438, Tylod,es\ is probably not Australian : 

 Boisduval gives no habitat ; but I have it from Gagie and 

 Ceram, where it was found by Mr. Wallace. 



The following table will give an idea of the diagnostic 

 characters of the species here described : — 



Elytra granulate. 



Kostrum punctured in four rows delirus. 



Rostrum irregularly punctured. 



Funicle scarcely longer than the scape bisignatus. 



Funicle twice as long as the scape cribricoUis. 



Elvti'u not granulate. 



l-'rothorax contracted behind the apex. 



Base of elytra not or scarcely broader than the prothorax. 

 Rostrum more or less closely and coarsely punctured. 

 Rostrum less closely pimctured towards the apex. 



Prothorax finely punctured perditm. 



Prothorax coarsely punctured fornminosus. 



Rostrum very closely punctured throughout .... nucleatus. 



Rostrum not closely or coarsely punctured nmntionius. 



Ease of the elytra manifestly broader than the prothorax distans. 

 Prothorax not contracted behind the apex expletiis. 



