282 Mr. J. S. Baly ow the Phytophaga. 



obtuse. Elytra sparingly clothed with very short suberect hairs, deeply 

 but not very closely pimctured, the punctures fusco-fulvous, placed in 

 irregidar rows, which, however, become lost towards the apex of the 

 elytra. Body beneath clothed with fine sUky hairs; hinder thighs 

 shorter than the abdomen, moderately incrassate, armed beneath with 

 a short tooth ; tibice obsciu'e' piceous. 



Mastostethus Stalii. (Plate XIII. fig. 4.) 



31. subelongatus, niger, nitidus, subtus pilis adpressis vestitus, supra fere 

 glaber; abdomine (segmenti analis plaga triangidari excepta), meta- 

 stemi plagis duabus medio conuexis, pygidii margiue, thoracis lateiibus, 

 elytrisque pallide flavis ; his punctatis, utroque plaga humerali tri- 

 gonata, fascia lata communi prope medium, margiue exteriore abbre- 

 viata, plagaque magna trigonata, ante apicem positis, nigiis. — Long. 

 4f , lat. 2i lin. 



JIab. Mexico. 



Subelongate ; the elytra broader than in the two preceding species. 

 Face trigonate, jaws elongate, epistome separated from the face by a deep 

 transA'erse groove, face closely punctured on either side near the inner 

 margin of the eyes ; central space smooth, impunctate, pimctvired portion 

 clothed with a few fine suberect hairs; antennae moderately robust. 

 Thorax one-fourth broader at the base than long, sides nearly straight, 

 narrowed from base to apex, angles obsoletely produced, obtuse, upper 

 surface moderately convex from side to side, obsoletely grooved on 

 either side just ^vdthin the apical margin, surface remotely punctm'ed. 

 Scutellum trigonate, its apex obtuse. Elji;ra much broader than the 

 thorax, subremotely punctm-ed ; hinder thighs shorter than the abdomen, 

 slightly thickened, unarmed beneath. 



Fam. Eumolpidae. 

 Genus Deemoehytis. 



Corpus subelongatum aut elongatum, subcyliudricimi. Ccqjut thoraci ad 

 oculosinsertum;/ac«eperpendiculari; ejnstoma male definitum; antennis 

 gracilibus, subfiliformibus, articvdis secundo et tertio longitudine fere 

 sequalibus ; lahro transverso ; mandihidis apice dentatis ; lahio subconico, 

 mc7ito antice concavo, liyula basi obtuse augulata ; imJparurn articulo 

 ultimo ovato; oculis prominulis, intus "vix emarginatis. Thorax sub- 

 cylindricus, lateribus marginatis, sagpe angulatis. Scutellum semiova- 

 tum, obtusimi. Elytra oblonga, parallela, punctata, interstitiis saepe in 

 strigas transversas elevatis. Pedes modice robusti, simplices, tarsorum 

 articulo basali duobus sequentibus breviore, unguiadis appendiculatis. 

 Prosternum subelongatum, lateribus concavis, medio dentatis; atite- 

 pectoris processu antero-laterali cimeifonni, apice late truncato, angulo 

 exteriore ad angidimi anticum thoracis nou producto. 



Type, Derniorhytis igneo-fasciata, Baly. 



