nncharacterised species of Diahrotica. 453 



Head not longer than broad, trigonate ; antennae three-fourths 

 the length of the body, robust, attenuated towards the apex, the 

 third joint more than twice as long as the second, rather shorter 

 than the fourth. Thorax one-half broader than long ; sides parallel, 

 obtusely rounded, the anterior and posterior angles thickened, 

 obtuse ; upper surface moderately convex, faintly excavated on the 

 middle of the hinder disk. Elytra oblong, slightly dilated pos- 

 teriorly, distinctly and rather closely punctured, punctures sub- 

 seriate on the middle disk. 



Diabrotica albosif/nata. 

 Anguste ovata, postice paullo ampliata, flava, nitida, capite, 

 pectore, tibiis tarsisque nigris, anteunarum articulis penultimis 

 duobus ultimique basi albidis; thorace lasvi, utrinque leviter foveo- 

 lato ; elytris tenuiter punctatis, nigris, utrisque limbo exteruo, 

 macula infra basin, fasciisque duabus, una prope medium, altera 

 ante apicem, albidis. Long. 3 lin. 



Hah. Guatemala {Dr. Schcrzcr). 



Antennae slender, filiform, the third joint scarcely more than one- 

 half longer than the second, the fourth equal in length to the 

 preceding two united. Thorax about one-third broader than long ; 

 sides nearly parallel and sinuate behind the middle, thence con- 

 verging towards the apex ; disk smooth, impressed on either side 

 with a shallow fovea, the space between obsoletely excavated. 

 Elytra oblong, slightly dilated posteriorly, convex, very minutely 

 punctured. 



Diahrotica piceicollis. 

 Anguste ovata, postice paullo ampliata, nigra, nitida, thorace 

 antennisque piceis, his basi et apice piceo-flavis, clypeo pedibusque 

 flavis, tibiis ad apicem nigro tinctis, tarsis piceis ; elytris crebre 

 tenuiter punctatis, flavis ; utrisque maculis duabus suturalibus, 

 prima elongata, postice attenuata, a basi fere ad medium extensa, 

 altera subapicali, parva, plagisque duabus magnis, una a basi ad vix 

 ultra medium extensa, subcuneiformi, intus angulatim emarginata, 

 altera transversa, inter medium et apicem oblique posita, nigris. 

 Long. 3 lin. 



Ilab. Amazons. ^ 



AntenuiE filiform, the third joint twice as long as the second, 

 equal in length to the fourth, the three lower, together with the 

 three or four apical joints, piceo-flavous. Thorax about one-fourth 

 broader than long ; sides sinuate and slightly diverging from the 

 base to beyond the middle, thence converging towards the apex, 



