Coleopterological Notices^ VI. 623 



my cabinet by two perfectly similar specimens from the less ele- 

 vated desert regions of the extreme southern part of California, 

 whence it was originally described, and laticeps by four homo- 

 geneous examples. Puncticollis is more northern in its range in 

 California. 



BOLITOPHAGINI. 



The North American genera of this tribe seem to be more con- 

 veniently divisible into primary groups upon the basis of anten- 

 nal structure than by the structure of the eyes, and, the occur- 

 rence of an interesting new type in the Pacific coast region, af- 

 fords an opportunity to outline their distinguishing characters as 

 follows : — 



Anteniife lO-jointed, the third much elongated, tenth perfectly free, the ninth 

 not emarginate; eyes not divided; prothorax broadly pednncnlate at base. 



Bolitotliei-us 



Antennae 11-jointed. 



Eleventh joint free, the tenth broadly arcuato-truncate at apex; eyes com- 

 pletely divided. 

 Pronotum tuberculose; elyti'a with coarse interrupted ridges. 



Bolitopliagiis 



Pronotum punctate; elytra Avith fine continuous ridges Eleates 



Eleventh joint set partially within the emarginate apex of the tenth and in 

 close contact throughout the width ; eyes not divided. 



Mentum not carinate; elytra with series of tubercles Iflegeleates 



Mentum with a strong compressed keel; elytra with tine even ridges. 



Eledoua 



Eledona appears to be of doubtful occurrence in the United 

 States, but is introduced for comparison. 



MEGEI.EATES n. gen. 



Body thick, subcylindric. Head deeply inserted, the apical 

 margin not reflexed except feebly toward the sides, continuously 

 and evenly arcuate, obtusely prominent laterally before the eyes, 

 the latter moderately coarsely faceted and one-half divided. Max- 

 illar}' palpi subcylindric in form, the joints in close mutual con- 

 tact, polished and sparsely punctulate, the last cylindro-conical 

 and nearly twice as long as the third. Antennal grooves beneath 

 the eyes moderately deep. Antennte with the third joint only 

 slightly' elongate. Prothorax not in the least pedunculate at base. 

 Scutellum oval, truncate at base. Epipleurre horizontal, rather 



