and Species of Eumolpide. 383 
impressum ; oculis rotundatis, plus minus prominulis, rarius 
emarginatis. 
Antenne infra oculos insertz, filiformes, tenues, corpore dimidio 
longiores: articulus primus oblongus, robustus ; secundus 
quadruplo minor; tertius duobus primis conjunctim visis 
zequalis, quarto longior, gracilis; quintus ad undecimum 
eequales ; ultimus brevissimus, gracilior, obtuse conicus. 
Labrum oblongum, convexum, angulis anticis rotundatis : mandibule 
bidentate. 
Palporum mavxillarium, articulus ultimus elongatus, apice obtusus, 
articulo secundo eequalis ; sequentes apicem versus incrassati ; 
tertius dimidio brevior praecedente et sequente. 
Thorax transversus, subquadratus, levis, angulis anticis subito de- 
flexis, acutiusculis ; lateribus marginatis, medio obsoletius 
bidentatis vel bisinuatis vel denique muticis ; basi truncatus, 
seepe utrinque foveolatus. 
Scutellum parvum, triangulare, apice obtuso, lave, rarius punctu- 
latum, interdum elytris non concolor. 
Antepectoris segmentum antero-laterale triquetrum, thoracis angu- 
lum non attingens. 
Prosternum postice attenuatum, superficie fere equata ; in Colaspide 
idem medio proéminet. 
Mesosternum antice bisinuatum, angulis anticis rotundatis, posticis 
acutiusculis. 
Elytra thorace latiora, plus quadruplo longiora, oblonga, parallela, 
dorso convexa, posterius lente declivia (in M. chlorophana &c. 
deplanata, apice subito clausa) ; punctato-striata, intervallis 
plus minus costatis (in M. chlorophana haud costatis) ; alis 
amplis. 
Pedes elongati, graciles, femoribus (preesertim posticis) nonnihil in- 
crassatis ; ¢ibiis intermediis extus ante apicem plus minus 
emarginatis ; tarsorum articulo primo sequentibus duobus 
gequali; unguiculis simplicibus, intus ad normam hujus fa- 
milize appendiculatis. 
Type of the genus, Colaspis quadrimaculata, Oliv. 
The characters of this genus, taken separately, are almost 
‘identical with those of Colaspis; but the different facies, repre- 
senting the aggregate of numerous small discrepancies, is suffi- 
cient to separate the two. The middle of the prosternum is 
more or less protuberant in Colaspis; in the present genus it is 
almost plane. ‘The intermediate tibise are not emarginate in 
Colaspis. The head and thorax of Metaxyonycha are smaller in 
proportion, and the latter less profoundly punctured, more obso- 
letely dentated at the sides, more convex anteriorly, and more 
rapidly deflexed towards the anterior angles. The antenne and 
legs are longer and more slender. 
Some of the species are the largest of the group, and all are 
natives of tropical America. The typical colour is testaceous, 
