230 DESCRIPTIONS OF NEW SPECIES. 



Protkorax nearly smooth, lateral tubercle very feeble and obtuse; elytra 

 with a few large punctures towards the sides. 8. l.evigatum Bland. 

 y. Elytra wider, sides more convex, lateral tubercle of prothorax 

 small, subacute, borizontal ; 

 Body stouter, uniform black, elytra very convex. 9. crassum Lee. 



fr. Protborax strongly, not densely punctured, sides scarcely tuber- 

 culate, elytra roughly punctured before tbe middle, sides sud- 

 denly inflexed. 10. obtdsum n. sp. 

 B. Scape of antennae strongly punctured, cylindrical at tip ; 

 Body more elongate (as in M. armatuni) ; prothorax nearly cylindrical 

 without lateral spine. 11. subrugosum Bland. 



556 M. gigas. Nigrum nitidum, prothorace punctis perpaucis notato, 

 lineaque basali majorum, spina laterali elongata acuta ; elytris an- 

 tice grosse punctatis, dorso deplanatis, lateribus subito deflexis ; anten- 

 nis scapo baud mucronato, articulo 3io usque ad medium cinereo-pubes- 

 cente. Long. 37 mm. 



Arizona ; Dr. Horn and Mr. Ulke. Easily known by the very 

 large size, the extremely long thoracic spines, and only the 4th 

 joint of the antennas with a broad, cinereous band. The elytral 

 punctures in one specimen are numerous, in the other very few. 



557. HH, forte. Nigrum subnitidum, prothorace parce fortiter puue- 

 tato, punctis postice sat densis, spina laterali acuta ; elytris subrugosis, 

 basi prsecipue versus latera grosse punctatis et asperatis, dorso con- 

 vexiusculo, lateribus subito deflexis ; antennis scapo haud mucronato, 

 articulis 3 — 7 basi cinereis, 8 — 11 totis cinereis. Long. 32 mm. 



Arizona ; Mr. Hike, also a very large species, but easily dis- 

 tinguished from the preceding by the prothorax being more punc- 

 tured, the spines shorter, the antennae annulate, and the elytra 

 less flattened on the back. It may perhaps be an extremely well 

 developed form of M. semipunctatum Lee, but in the absence of 

 a full series of specimens it would be hazardous to unite them. 



55S. HI. obtusum. Nigrum subnitidum, protborace parce fortiter 

 punctato, lateribus subsinuatis haud spinoso ; elytris ante medium as- 

 perato-punctatis. dorso modice couvexis, lateribus subito inflexis ; an- 

 tennis scapo haud mucronato, articulis 3 — 7 basi cinereo-pubescentibus. 

 Long. 20 mm. 



Utah ; Mr. Ulke. Of the same form as M. ajopressum Lee. 

 but with the elytra less flattened on the back, and the scape of 

 the antennae not mucronate ; the cinereous bands of the antennae 

 are gradually shorter, so that the one on the 7th joint is very small. 



