BY EUSTACE W. FERGUSON. 399 



Dimensions : c?. 9.5 x 3 mm. ; 5. 11 x 4.5 mm. 



Hab. — Western Australia: King George Sound. 



This species is commented on under the i)receding one — //. furcaliis Macl. 



Hyborrhynchus bicornutus Macl. 



Maeleay, Trans. Ent. Sec. N.S. Wales, i., 1866, p. 333. 



c?. Elongate, narrow; densely clothed with brown and grey subpubescence ; 

 sides witli white clothing, irregularly arranged on prothora.x. forming two in- 

 complete vittae on elytra. 



Head somewhat depressed in front; frontal tubercles absent; supraorbital 

 tubercles large and conical. Rostram widely excavate above, lateral margins 

 raised into a strong triangular tubercle; basal tubercles small and granuliform, 

 moderatelv close together. Antennae witii second joint of funicle longer than 

 first. 



Prothorax produced over head above; submedian tubercles with the apical 

 one moderately strong, projecting ujiwards and forwards, followed by a row of 

 3 or 4 obtusely conical erect tubercles in single series, diminishing in size to- 

 wards base; lateral margins with a moderately strong tubercle in front of an- 

 terior constriction, the antero-lateral tubercle large and outwardly projecting, the 

 postero-lateral smaller but acute. 



Elytra elongate, narrow; base with forward projecting tubercles at the ends 

 of the first and third interstices; apex emarginate, rather briefly mucronate on 

 each side; punctures moderately regular and distinct; with two rows of tubercles, 

 first row with about 10, the first moderately large and acute, followed by about 

 7 smaller, closely set, obtuse tubercles and then with three larger more conical 

 tubercles, the last being strongly spiniform; second row with 6-7 erect spiniform 

 tubercles, the first and the last two rather longer than the othei-s, the apical 

 descending to a lower level than the apical tubercle of fii-st row; seventh inter- 

 .stice with a single infra-humeral spine. 



Venter moderately densely clotlied with brown, with traces of a wliite median 

 vitta. Legs elongate, slender. 



?. Head, rostrum and prothorax similar to c?. Elytra broader, more 

 rounded ; tubercles greatly debased, those on third interstice forming a slightly 

 raised ridge, the component tubercles only traceable at the two ends, the ajjical 

 tubercle moderately strong; fifth intei-stioe with 7-8 tubercles, all distinct but 

 much smaller than in c?. ; infra-humeral spine small and granuliform. Venter 

 convex. 



Dim.ensiiiiis: <S. 0.5 x 3.5 mm.; 2. 10 x 4 mm. 



TIah. — South Australia: Port Lincoln. 



H. hiconmtus may be distinguished from its congeners by the almost com- 

 plete absence of the basal rostral spines, which are represented merely by two 

 grannies. Described from specimens (? types) in Maeleay Museum. 



N K O n Y B B R H Y N C H U S, n.g. 



Genotype — Hi/borrlnpicliUf! rur/o.sHfi Macl. 



Elongate, narrow species, allied to lli/hurrhi/nchus. 



Head convex, front rugose, with supraorbital ridges, not tubercles. Rostrum 

 separated from head above bj' a transverse impression; upper surface deeply 

 excavate, the elypeal plate inserted between the ends of the external margins. 

 Scrobes extending back to anterior margin of eyes. Eyes rotundate, moderately 

 coarsely faceted. Prothorax longer than wide, convex, without lateral tulierdes. 

 Elytra elongate, strongly transversely convex; liase contained between tlie pro- 



