and Species of Eumolpida. 388 



impressum ; oculis rotundatis, plus minus prominulis, rariu9 



emarginatis. 

 Antennce infra oculos insertse, filiformes, tenues, corpore dimidio 



longiores : articulus primus oblongus, robustus ; secundus 



quadruple minor ; tertius duobus primis conjunctim visis 



sequalis, quarto lougior, gracilis ; quintus ad undecimum 



sequales ; ultimus brevissimus, gracilior, obtuse conicus, 

 Labrum oblongum, convexum, angulis anticis rotundatis : mandibulsei 



bidentatse. 

 Palporum maxillarium, articulus ultimus elongatus, apice obtusus, 



articulo secundo eequalis ; sequentes apicem versus incrassati ; 



tertius dimidio brevior praecedente et sequente. 

 Thorax transversus, subquadratus, laevis, angulis anticis subito de- 



flexis, acutiusculis ; lateribus marginatis, medio obsoletius 



bidentatis vel bisinuatis vel denique muticis ; basi truncatus« 



saepe utrinque foveolatus. 

 Scutellum parvum, triangulare, apice obtuso, Iseve, rarius punctu- 



latum, interdum elytris non concolor. 

 Antepectoris segmentum antero-laterale triquetrum, thoracis angu- 



lum non attingens. 

 Prosternum ^o?,t\ce attenuatum, superficie fere sequata; in Colaspide 



idem medio proeminet. 

 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) ; alls 



amplis. 

 Pedes elongati, graciles, femoribus (praesertim posticis) nonnihil in- 



crassatis ; tibiis i7itermediis extus ante apicem plus minus 



emarginatis; tarsorum articulo primo sequentibus duobus 



sequali ; unguiculis simplicibus, intus ad normam hujus fa- 



milise appendiculatis. 

 Type of the genus, Colaspis quadrimaculata, Oliv. 



The characters of this genus, taken separately, are almost 

 identical with those of Colaspis ; but the diflferent 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 tibiffi are not emarginate in 

 Colaspis. The head and thorax of Metaxyonycha are smaller ixi 

 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 antennae 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. 



