38 Mr. Joseph S. Baly on the 



subcuneiformibus, fere ad medium extensis, et utroque plaga 

 transversa pone medium, interdum postice emargiuata, nigro- 

 cyaneis. 



Long. 3 lin. 



Hah. Cayenne, Upper Amazons. My collection. 



Longitudinal ridge on clypeus ill-defined; antenme nearly fonr- 

 fifths the length of the body, filiform, the second joint short, the 

 third scarcely longer than the second, the fourth longer than the 

 preceding two united ; the fifth, sixth, seventh, eighth and eleventh 

 joints piceous, the rest obscure fulvous. Thorax shaped as in 

 D. data. Elytra rather closely and distinctly punctured, not 

 depressed below the basilar space, obsoletely plicate below the 

 humeral callus. 



This species differs from D. data in the coloration of 

 the thorax, in the more distinct punctuation of the 

 elytra and in the different coloration of the elytral 

 markings. 



Spec. 67. Diahwtica mutahilis, Baly. 



Journ. Lin. Soc, xix., p. 225. 



Hab. Colombia. My collection. 



Very closely allied to D. tuDiidicornis, Erichs. ; sepa- 

 rated by its broader more oval form and by the presence 

 of several faint longitudinal sulcations on each elytron 

 (these are not mentioned in the original description) ; 

 the antennae in the male are thickened as in the former 

 species, but the two upper joints are less abruptly 

 narrowed. In my original diagnosis of this insect I 

 described the thorax as obsoletely bifoveolate : this is to 

 some extent an error ; the foveae vary in depth, but in 

 the majority of specimens are well-dehned. 



Spec. 68. Diahrotica tumidicornis, Erichson. 

 Wied. Arch., 1847, p. 167. 

 Diahrotica fidv of asciata, Jacoby, Proc. Zool. Soc, 1889, 



p. 281. 

 Elongata, postice vix ampliata, convexa, pallide viridis, nitida, 

 capite, pectore, abdomine tibiisque flavis, his ad basin antennisque 

 fuscis ; thorace bifoveolato ; elytris tenuissime punctatis, pallide 

 prasinis aut viridi-flavis, ad basiu interdum nigro-maculatis, plerum- 

 que vh'idi-marginatis. 



