BY REV. T. BLACKBURN. 503 



prof uncle concava impresso, parte concava antice utrinque cornu 

 compresso porrecto ad apicem subbifido armata (postice prope 

 pronoti basin sulco recto valde elongato valde prof undo transverso 

 marginata), cornuum interspatio latitudine capitis latitudini 

 aequali, margine antico profunde bifoveolato, lateribus sat fortiter 

 serrulatis, angulis anticis vix prominentibus posticis nullis ; 

 scutello medio puncturis nonnullis impresso; elytris sat fortiter 

 15-punctulato-striatis, striis 14« IS^que antice confluentibus, 

 interstitiis planis; tibiis anticis extus 5-dentatis, posticis trans- 

 versim 4- vel 5-carinatis. Long. 10, lat. 7 lin. 



Femina latet. 



The most conspicuous character of this fine species is the 

 extraordinary sulcus that runs across the pronotum near the base 

 (almost at the hind limit of the large concavity which occupies 

 the front two-thirds of the middle of the segment). This sulcus 

 is very deep, sharply defined, and nearly straight, and extends 

 on either side to within a short distance from the lateral margin. 

 The nearest approach to this character in the other species known 

 to me is in B. rhinoceros, MacL, but in that insect the transverse 

 furrow is less sharply defined, much more arched, much shorter, 

 and is placed slightly in front of the middle of the length of the 

 pronotum. This species, in general characters, comes nearest to 

 rhinoceros, differing from it, inter alia, by the shape of its frontal 

 horn, the horns of its pronotum wider (viewed from the side) and 

 less erect, and its frontal horn thinly clothed with long fine 

 pilosity. The other species known to me (of this group) having 

 the frontal horn pilose are Sloanei, Blackb.; cornigerur)i, Macl.; 

 cavicoUe, Macl., and Reichei, Guer. This Bolboceras was gener- 

 ously given to me by Mr. Froggatt. 



N. Queensland (Charters Towers). 



B. BoviLLi, sp.nov. 



Mas. Latum; sat nitidum; supra glabrum; subtus hirsutum, 

 castaneum; mandibulo sinistro (superne viso) extus pone apicem 

 fortiter sinuato; capite ante eminentiam frontalem confertim 

 ruguloso ; antennarum clava globosa (hujus articulis P 3°que 



