60 PHYTOPHAGA. 
bisinuate; upper surface subcylindrical, transversely depressed on the hinder disc, 
closely covered with large coarse punctures. Elytra narrowly oblong, slightly dilated 
posteriorly ; apical margin conjointly obtuse, broadly sinuate on either side; outer 
margin (the sinuate apices excepted) serrulate ; upper surface granulose ; each elytron 
at the base and on the medial disc with eight, at the apex with nine, rows of fine, but 
distinctly impressed punctures ; the second interspace, together with the suture at its 
apex, strongly costate ; the sixth interspace less strongly elevated. 
2. Apices of the elytra conjointly rounded, the sutural angle entire. 
19. Chalepus instabilis. 
Subelongatus ; subtus niger, nitidus, femoribus anticis subtus, posticisque basi, flavis; supra subnitidus, fulvus 
aut rufo-fulvus, vertice, antennis scutelloque nigris; thorace subcylindrico, dorso leviter deplanato, 
crebre et fortiter punctato, lateribus vittaque discoidali nigris ; elytris anguste oblongis, fere parallelis, 
apice rotundatis, minute serrulatis; utrisque octo- basi extrema et apice nono-seriato-punctatis ; inter- 
spatiis secundo, quarto sextoque, nec non sutura, costatis; nigris, utrisque vitta laterali, a basi ad ultra 
medium extensa (basi lata, ad apicem attenuata), fulva ornatis. 
Var. A. Elytris nigris, utrisque macula basali alteraque apicali, rufo-fulvis ornatis. 
Var. B. Elytris totis fulvis. 
Var, C. Thorace elytrisque fulvis. 
Long. 2 lin. . 
Hab. Mexico, Toxpam, Yolos, Cordova (Sallé, Hoge); GuatemaLa, Capetillo, San 
Gerdnimo, Cerro Zunil 4000 to 5000 feet, Panajachel 5000 feet, Chiacam in Vera Paz 
(Champion). 
Head smooth, impunctate ; interocular space moderately produced ; vertex sometimes 
black. Antennee more than one third the length of the body, filiform, very slightly 
thickened towards the apex; joints cylindrical. Thorax transverse ; sides very slightly 
converging from base to apex, obsoletely angulate ; upper surface subcylindrical, flattened 
on either side the medial disc, leaving (in some specimens) a narrow, ill-defined, longi- 
tudinal ridge. Elytra narrowly oblong, very slightly increasing in width from the 
base to the posterior angle, regularly rounded at the apex; outer margin finely serru- 
late; each elytron with eight, at the extreme base and at the apex with nine, rows of 
punctures; second, fourth, and sixth interspaces, together with the suture, costate. 
IV. Each elytron with ten, about the middle portion with eight or nine, rows of punctures. 
20. Chalepus marmoratus. (Tab. III. fig. 11.) 
Anguste oblongus, subcuneiformis, -nitidus, fulvus ; pectore piceo, thorace pedibusque flavis, tarsis pallide 
piceis, elytris castaneo marmoratis; thorace transverso, subcylindrico, pone medium transversim excavato, 
crebre et rude punctato, lateribus a basi ad apicem convergentibus, leviter rotundatis, medio obsolete 
angulatis ; elytris oblongis, a basi apicem versus vix ampliatis, serrulatis, apice obtusis ; dorso deplanatis, 
utrisque decem-, paullo ante medium nono-, apice extremo octo-, seriato-punctatis; interstitiis elevato- 
reticulatis; interspatiis secundo, quarto, sexto (basi et apice) octavoque costatis, hoc apice cristato; callo 
humerali oblique elevato, subacuto. 
Long. 2-23 lin. 
