( 505 ) 
gulari, apice pilis longis, flavis, fasciculatis, ornato, capitulo pu- 
bescente, 3-annulato. Prothorax latitudine paullo longior, late- 
ribus a basi ad medium subrectis, parallelis, dein ad apicem 
aequaliter rotundatus , basi truncatus, angulis posticis (desuper 
intuenti) obtuse subrectis; supra cylindrice convexus, brunneus, 
opacus, glaber, disco anterius subinfuscatus, ante medium utrin- 
que obsolete impressus, anterius fortius dense granulato-exaspe- 
ratus, posterius crebre subtilius granulato-punctatus. Scutellum 
rotundum, brunneum, opacum, granulate punetatum. Elytra lati- 
tudine thoracis et eo duplo fere longiora, eylindrica , basi trun- 
cata, lateribus rectis, parallelis, humeris elevatis rectangulis, in 
margine apicali, ad angulum suturalem , in spinam communem, 
acutam, producta; supra cylindrice convexa, brunnea, opaca, 
glabra, fortiter rugosa, profunde punctato-striata, punetis latis, 
subquadratis , confertis, interstitiis valde angustis, subcostato- 
elevatis, singulo quoque setis pallidis brevibus, obtusis, unise- 
riatim obsito; stria suturae proxima ceteris aequalis; apice con- 
vexe rotundato-declivi, interstitiis striarum subtiliter uniseriatim 
granulatis. Corpus infra piceo-brunneum, punctatum. Pedes 
breves, ferrugineo-testacei, femoribus anticis valde compressis, 
latis, tibiis brevibus, apice truncatis. 
Patria : America meridionalis (Bahia), ex coll. dom. Chapuis. 
Juvat diagnoses insectorum aliorum hujus generis notorum 
tradere ex libello Lecontei, Synops., app., 1868, p. 165, 1 et 2. 
2. M. SUTURALIS, Leconte. 
Slender, cylindrical, blackish-brown, antennae yellow, scape 
broadly triangular, flattened, fringed towards the tip with very 
long yellow hairs; head concave; prothorax one-half longer than 
wide, sides paralled behind the middle, rounded in front, base 
feebly rounded ; surface dull with fine reticulations, and scattered 
granules gradually becoming larger and acute in front of the 
middle, where color becomes reddish brown. Elytra with close 
