396 REVISION OF THE AMYCTBRIDESj 



The frontal tubercles are hardly more than granules and may be oljsolete. 



The species is nearest to //. prodigm Macl., but may be distinguished by the 

 postero-lateral prothoracio spine being developed, and by there being only two 

 rows of tubercles on the elytra. 



Hyborehynchus prodigus Macl. 



Macleay, Trans. Ent. Soc. N.S. Wales, i., 1866, p. 333. 



J. Elongate, narrow; densely clothed with greyish subpubescence, elytra 

 with a median brown vitta, maculate with white, sides of prothorax bivittate, 

 and lower margin of elytra vittate with white. 



Head similar to H. coenosus, but supraorbital crests longer and more acute. 

 Rostrum with marginal and basal tubercles also mucli longer and more acute, 

 the basal ones farther apart. Prothorax similar; submedian tubercles narrower 

 and more erect ; lateral margins with a single anterior spine, the posterior 

 obsolete. 



Elytra similar to II. coenosu.'i; punctures more regular and distinct; third 

 interstice with a row of about nine tubercles, the humeral and last two or three 

 acutely spiniform, the apical ones long, projecting backwards, the others smaller 

 but conical and more distinct than in H. coenosus; fifth interstice with six 

 tubercles somewhat more slender and acute than in H. coenosus; seventh 

 interstice with a moderately large infra-hnmcral spine, followed by a row of three 

 small spiculiform tubercles. 



Venter with brown clotliing and a median vitta of white. Legs long and 

 slender. 



9. — Head, rostrum and prothorax similar. Elytra noticeably broader with 

 apical mueronations nearer and not divergent ; tubercles slightly smaller. Venter 

 gently convex. 



Dimensions: d. 10.5 x 4 mm.; ?. 11.5 x 5 mm. 



Hah. — Western Australia: King George Sound. 



The differences between this species and its nearest ally — H. coenosus — are 

 given under that species. It might be added that the supraorbital and rostral 

 spines are longer tlian in H. coenosus. 



The above description was drawn up from the Macleay Museum siiecimens, 

 which are probably the types. 



Hyborrhynchus aculeatus, n. sp. 



c?. Small, elongate, very strongly sjiinose. RIack ; clothing abraded. 



Head somewliat flattened in front; frontal tubercles absent; suin'aorl)ital 

 tubercles long, acute, erect. Kostrum concave above; marginal tubercles rather 

 short, but erect and acute; basal tubercles widely separated, hmg and acute. 



Prothorax strongly ])roduced over head; submedian row with the first 

 tubercle produced as a long spine projecting far over tlie liead. the remaining 

 tubercles small but conical, not quite in a straight line; lateral margins with 

 two strong outwardly projecting spines, the anterior in front of the subapical 

 constriction, with a strong forward inclination, the second representing the antero- 

 lateral spine, with a slighter forward incliiuition ; two small granules present 

 posterior to middle. 



.Elytra narrow, widest anterior to middle; ba,se with foi-ward projecting 

 spines at the ends of the first and third interetices ; apex with a strong spine 

 on each side; punctures moderately large and deep; granules not traceable; 

 with two rows of tuliercles, the first row on the third intei-stice consisting of 



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