South American species of Diahrotica. 9 



Hab. Amazons (Bates) ; Upper Amazons (Staudinger) ; 

 var. B, Cayenne. Coll. Jacoby {tyijc) and Baly. 



Head not longer than broad, triangular ; clypeus with a distinct 

 longitudinal ridge ; antennae slender, filiform, the second and third 

 joints very short, nearly equal, the fourth much longer than the 

 preceding two united, the three upper joints (the apex of the 

 terminal one excepted) yellowish white, the three or four lower 

 ones in some specimens piceous. Thorax more than one-half 

 broader than long ; sides faintly diverging and slightly sinuate from 

 the base to beyond the middle, thence rounded and converging 

 towards the apex, the anterior angles obtuse, the hinder ones sub- 

 acute; disk transversely convex, smooth, impunctate. Elytra 

 oblong-ovate, dilated posteriorly, regularly rounded at the apices ; 

 convex, sometimes faintly impressed below the basilar space, 

 rather closely and distinctly punctured. 



The present and preceding species are very closely 

 allied and possibly may prove to be local forms of the 

 same insect ; for the present, however, I think it right 

 to consider them distinct. 



Spec. 7. Diahrotica testa ceicollis. 



Oblongo-ovata, postice ampliata, convexa, flava, nitida, pectore, 

 tibiis, tarsis, scutello capiteque nigris, antennis ante apicem albidis, 

 basi picea ; thorace convexo, rufo-testaceo, elytris tenuiter punc- 

 tatis, nitidissimis, nigris, utroque maculis parvis tribus, duabus 

 ante medium una ante apicem, hneaque transversa vis pone 

 medium posita, utrinque abbreviata, albidis. 



Long. 3 lin. 



Hah. Amazons (Bates) ; Peru. My collection. 



Antennge filiform, nearly equal to the body in length, the second 

 joint short, the third slightly longer, the fourth more than equal in 

 length to the preceding two united ; black, the four lower joints 

 piceous, the ninth, tenth, and the lower half of the eleventh, white. 

 Thorax nearly one-fourth broader than long ; sides slightly sinuate 

 and nearly parallel from the base to the middle, thence obliquely 

 converging towards the apex ; convex, nitidous, impressed just in 

 front of the basal margin with a shaUow fovea. Elytra ovate, 

 dilated posteriorly, convex, faintly excavated on the suture below 

 the basilar space, the latter obsoletely thickened, surface finely 

 but distinctly punctured ; transverse band narrow, margined above 

 and below by a faint sulcation. 



The above insect may be known by the entire absence 



