226 MB. J. S. BALT ON THE COLOMBIAN 



duobus peniiltimis albidis ; thorace bifoveolato, elytiis tenuissime 

 punctatis, fascia lata basali, alteraque vix pone medium, extrorsum 

 abbreviatis, nigris. Long. 2| lin. 



Hal. La Pavas ; Fasagasuga. 



Very similar to D. mutahilis ; elytra rather more finely punc- 

 tured ; tlie antennae in tlie female (the only sex known) black, 

 the ninth and tenth joints wtiite. 



30. DiABROTiCA FORMOSA. Anguste ovata, postice vix ampliata, pra- 

 sina, nitida; capite, scutello, pectore,tibiistarsisque nigris; eoxisflavis; 

 autennarum articulo basali prasino, articulis antepenultimo et penul- 

 timo albidis ; thorace bifoveolato, angulis anticis discique maculis 

 flavis; elytris distincte punctatis, plaga magna basali, communi, fere 

 ad marginem externum extensa, alteraque subrotundata pone medium, 

 aurantiaceis; macula communi basali, secunda super callum humeralem 

 tertiaque maculae aurantiacse medio positis, brunneis. Long. 3 lin. 



Hah. Venezuela, a single specimen. 



Head longer than broad, triangular ; antennae slender, second 

 and third joints very short, nearly equal, the fourth as long as 

 the preceding two united ; basal joint pale green, its apex, to- 

 gether with the following three joints, piceous, the fifth to the 

 eighth together with the apical one black, the ninth and tenth 

 white. Thorax one half broader than long; sides parallel and 

 sinuate from the base to beyond the middle, thence converging 

 towards the apex ; upper surface very minutely punctured, very 

 remotely punctured on the disk, rather deeply bifoveolato ; on the 

 hinder disk is a third, very small, fovea. Elytra distinctly punc- 

 tured, impressed below the humeral callus with an ill-defined 

 longitudinal sulcation. 



31. DiABROTiCA viEiDi-pusTULATA. Angustc oblonga, postice vix 

 'ampliata; viridis, nitida; postpectore, pedibus (coxisfemoribusque basi 



exceptis), capite scutelloque nigris ; thorace transverso-quadrato, Isevi, 

 utrinque foveolato ; elytris crebre punctatis, disco exterior! obsolete 

 elevato-vittatis, inter vittas longitudinaliter sulcatis, nigris, plaga 

 magna prope medium, utrinque vix abbreviata, maeulaque subapicali, 

 subrotundata, viridibus. Long. 2^ lin. 



Hah. Coper : a single specimen in coll. Steinheil. 



Pront impressed with a deep fovea ; encarpse transverse, con- 

 tiguous ; carina elevated, linear ; antennae filiform ; second and 

 third joints short, the third nearly one half longer than the 

 second, less than half the length of the fourth ; eight lower joints 

 black (the tJiree uj)per joints wanting). Thorax transverse-quad- 



