174 THE INSECTS OF GAYNDAH, 



labram more emarginate, the frontal horn less arched forwards, 

 less emarginate at the extremity, and more sulcate on the back, 

 in the lateral fovea on the thorax being more uninterruptedly 

 semilunar, and in having the strise on the elytra more profound. 

 1 name the species after Dr. J. J. Kaup, of Darmstadt, who 

 has made the Passalidce the object of his study for some time. 



330. — TiENiocERUS Masteesii. n. sp. 

 Length 9 lines. 

 Black, nitid, and of an elongate form, frontal horn short, 

 obtuse, and slightly sulcate on the back. Thorax transverse, 

 rather rounded behind and deeply impressed on the median line, 

 with the lateral foveae shorter, less semilunar and nearer the 

 posterior angles than in the species last described. Elytra 

 punctato-striate, the punctures indistinct in the first three striae 

 from the suture. Club of the antennse large. 



331. — Mastochilus australasicus, Perch. Suijpl. I., 

 page 6, t. 77,/. 2. 



332. — Mastochilus polyphyllus, McLeay. 

 King^s Survey II., page 439.' — Burm. 

 Handb. Y.,page 469. 



Hexaphjllus Boisd. Voy. Astrol. Col., page 241. 

 Sexdentatus Perch. Mon., page 28, i. 2./. 5. 



333. — Mastochilus nitidulus. n. sp. 

 Length 15 lines. 

 Like M. dilatatus Dalm. Head very rugose, with the frontal 

 ridge rather long, and from the extremity of it a small ridge ex- 

 tending obliquely to the basal angles of the labrum, in the middle 

 of these oblique ridges there is a small tubercle, and a low trans- 

 verse ridge unites these two tubercles, thus enclosing a small trian- 

 gular space in front of the frontal ridge. In these particulars the 

 sculpture of the head in this species differs widely from that of 

 M. dilatatus, where the tubercles are larger, and there are two 

 large transverse ridges, one on the foi'ehead, the other a shorter 



