Genera and Species of Colcoptcra. 459 



Bt/rsa.v* Macleayi. 



B. oblongii!?, fuscufl ; capito maris cornibu.s dcvatis, apiceni vorsuM in- 

 curvatis ot dociissatis ; prothoraco tubcrciilato, di.sco 4-tiib('rculat() ; 

 elytris subdisporso punctatis, tuberculis magnis subserialini positis. 



Hah. Australia. 



Oblong, dark brown, opake ; head of the male amied with two long 

 stout vertical horns, incurved and crossing each other at the tips, the 

 tips themselves emarginate or reduced in thickness ; head of the female 

 with a simple tubercle between the eyes; prothorax finely puncturi'd, 

 very tuberculate, four principal tubercles on the disk towards the base 

 arranged in pairs (::), in the female two others at the -extreme apex, 

 much produced, slightly recm'ved and transversely compressed ; elytra 

 somewhat coarsely punctured (the punctures rather depressed), tuber- 

 culate, four principal tubercles oblong and very large, on each side of the 

 suture ; between these and the margin on each side three slightly irre- 

 gidar rows of smaller and rounder tubercles ; body beneath and legs 

 reddish brown ; mesoSternum with a very compressed vertical process ; 

 club of the antenna? 7-jointed. Length 5 lines. 



The genus Byrsax was proposed by me in the first number of this 

 Journal (April, 1860), and differs from M. Motschoulsky's Boli- 

 toxenus{' Etudes, &c.,' 1858, p, 63), in that the elytra have a produced 

 margin, which is always coarsely serrate, aiid the prosternum is keeled 

 anteriorly. Byrsax was there, in consequence of its tarsi appearing 

 to me to be tetramerous, referred to the Colydiidae ; at the same time 

 I pointed out its resemblance to Diaperis Jion^ida, 01. (a true Byrsax), 

 but stated that, " guided by its tetramerous tarsi," its real affinity 

 would be with Endophloeiis, Pristodems, and some other genera. T 

 am now satisfied that it is truly heteromerous, the basal joint, indeed, 

 being completely hidden in the cotyloid cavity of the tibia. I am not 

 so satisfied, however, that the resemblance between it and the above 

 Colydiide genera is only one of analogy. Bolitophagus yibbifer, Wes- 

 mael, is possibly identical with Byrsax ccenosus. There are, how- 

 ever, several other undescribed species. 



Byrsax egenus. 

 B. oblongus, indumento terrulento fulvescente tectus; prothorace gibboso, 



disco 8-calloso, callis tuberculatis ; elytris subseriatim callosis. 

 Hah. Australia. 



Oblong, covered with a fulvescent tomenticious substance ; head with 

 four tubercles between the eyes, and two on the clypeus ; prothorax 

 very gibbous, the disk with four large callosities anteriorly, each ap- 

 parently made up of three or four conical tubercles, and four smaller 



* Pascoe, Journ. of Entom. i. p. 42. 



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