BY EUSTACE W. FERGUSON. 395 



new genus, proposed to receive it and the species — H. mastersi Macl., and H. 

 crassiusci(h<s Mad. — mentioned above. 



Table of Species. 



Basal rostral tubercles strongly developed, acute. 



Supraorbital tubercles long, more or less acute. 



Prothorax with the tubercle anterior to subapical constriction not 



abnormally developed. 



Postero lateral tubercle of prothorax present //. coeiiosns Bohem. 



Posterolateral tubercle absent H. prodiffus Macl. 



Prothorax with a long spine anterior to subapical constriction 



H. aculeatus n. sp. 



Supraorbital tubercles small, obtuse. 



Both sexes with a median pale vitta on elytra bifurcate at edge of 



declivity H./tircatiis Mad. 



Male with several narrow vittae, female maculate . . . . H. macula/us Mad. 



Basal rostral tubercles small, granuliform H. biconiutus Macl. 



I have followed the usual spellinj;' of the name of the g-enus. Madeay 

 however used Hiihorhynchus. The emendation appears to have lieen made by 

 Pascoe and is adopted in Masters' Catalogue. 



Hyborrhtnchus coenosus }5ohcm. 



Amycterus coenosus, Bohemann, Schonh. Gen. Spec. Cure., vii., (1), 1843, 

 p. 80; Hyborhiinchus coenosus, Mad., Trans. Ent. Soe. N.S. Wales, i., 1865, 

 p. 297. 



6. Elongate, narrow; clothed with rather dense brownish subpubeseenee. 



Head with frontal tubercles small; supraorbital tubercles moderately long, 

 erect. Rostrum excavate above; lateral margins triangularly raised in a short 

 tubercle; basal tubercles large and erect. Antennae with first joint of funicle 

 slightly shorter than second. Eyes rotundate. Prothorax slightly produced 

 above, without evident ocular lobes; disc flattened; median area depressed, 

 obsoletely granulate; submedian tubercles small, noduliform, irregidarly set, the 

 median ones more outwardly placed; lateral margins bituberculate. the tubercles 

 elongate, triangulifoi-m, the anterior longer than the posterior. 



Elytra jiarallel-sided, with apex strongly bimucronate; base with forward 

 projecting tubercles on the first and third interstices; punctures obscured by 

 clothing; with two rows of tubercles, situated on the third and fifth interstices; 

 first row with a large conical tubercle or spine at humeral angle, followed by 

 about six tubercles, the anterior onas small and noduliform, the posterior three 

 or four conical and spiniform, the last much the largest and projecting back 

 over the decli\"ity; second row on fifth interetice about 5 in number, fonning the 

 lateral margin, the first tubercle large anil spiniform, the second smaller !«it 

 spiniform, the others becoming progressively larger, the last very long, situated 

 on a lower level than the apical titberde of the fii-st row; seventh interstice with 

 a small infra-humeral tubercle. 



Venter flat, densely covered with brown de])ressed clothing. Legs elongate, 

 slender. 



?. Larger, with wider elytra in comparison with prothorax; liead and pro- 

 thorax similar; elytral tubercles slightly smaller; venter feebly convex. 



nim.ensions : c?. 11 x 4 mm. ; ?. 13 x 4.5 mm. 



Hah. — TVestern Australia: Swan R. (Bohemann), King George Sound 

 (Madeay). The locality, Swan R., given in the original description is probably 

 ef|uivalent to Swan River Colony. 



