SPECIES OF THE GENUS DIABROTTCA. 217 



nitido ; elytris oblongis, apicem versus pauUo ampliatis, coQvexis, 

 subciebre punctatis, maculis 15 (3, 4, 4, 4 transversim dispositis) nigris, 

 ornatis. Long. 4 lin. 



Sab. La Luzula ; also Ecuador. 



Head distinctly longer than broad, subtriangular, nearly im- 

 punctate ; antennae slender, the second and third joints very- 

 short, nearly equal, the fourth joint slightly longer than the 

 preceding two united. Thorax scarcely longer than broad ; sides 

 nearly parallel, converging near the apex, sinuate from the base 

 to beyond the middle ; above transversely convex, subconic near 

 the apex, smooth, impunctate. Elytra convex, distinctly but not 

 closely punctured, marked with fifteen large black spots, arranged 

 in four transverse rows — three at the base, the middle one com- 

 mon, four just before and four immediately behind the middle, 

 and, lastly, four midway between the last row and the apex ; this 

 roV is sometimes obsolete. 



9. DiABROTiCA Dysoni. EloQgato-ovata, postice vix ampliata, con- 

 vexa, flava, nitida, metapectore capiteque nigris ; antennarum articulis 

 antepenultimo et penultimo fulvis, labio piceo, mesosterno, scutello 

 thoraceque rufo-fulvis, piceo tinctis ; thorace Isevi, leviter bifoveolato ; 

 elytris distincte sed tenuiter punctatis ; vittis tribus, a basi fere ad 

 medium extensis, vitta media communi et utrisque maculis oblongis 

 duabus pone medium positis, cyaneo-nigris. Long. 3 lin. 



Sab. Colombia (St/son). 



Head not broader than long ; antennae filifcrm, the second 

 and third joints short, the latter scarcely one half longer than 

 the second, fourth joint as long as the preceding two united. 

 Thorax one half broader than long; sides parallel and sinuate 

 from the base to beyond the middle, thence obliquely converging 

 to the apex ; disk transversely convex ; middle disk flattened, 

 obsoletely bifoveolate. Elytra oblong, very slightly increasing 

 in width posteriorly, convex, faintly depressed near the suture 

 below the basilar space, finely but distinctly punctured ; surface 

 with three nigro-cyaneous vittse, placed transversely at the base 

 and extending nearly to the apex, the middle one sutural, 

 common, the lateral ones covering the humeral calli ; in addi- 

 tion, placed transversely on the hinder disk of each elytron, are 

 two similarly coloured patches, the inner one oblong, the outer 

 elongate. 



