M. JACOBY, SOME BOLIV. AND ARGENT. PHYTOPHAG. COLEOPTERA. 515 



versety depressed between the eyes, labrum black, antennee 

 long and slender, black, the lower four joints flavous, the 

 basal joint black above, the third and the following joints 

 nearly equal, terminal joints but slightly thicker, thorax 

 scarcely twice as broad as long, narrowed anteriorly, the 

 sides with a narrow refiexed margin, snbangulate below the 

 middle, the surface irregnlarly but rather strongly punctnred, 

 more closely so at the sides, scutellnm impnnctate; elytra 

 scarcely perceptibly depressed below the base, strongly punc- 

 tnred in closely approached regular rows, the punctures mnch 

 finer near the apex, below and the legs black, the flancs of 

 the thorax with a greenish gloss, prosternum broad. 



Hab. Salta, Argentine Rep. 



There are two specimens of this species before me, which 

 at first sight seem to represent different forms, as the size 

 and colour as well as the thoracic punctuation varies a good 

 deal, which is doubtless sexual, as both sexes are before me, 

 the female is larger, of violaceous colour above and the punc- 

 tures of the thorax are less pronounced, otherwise no diffe- 

 rences are visible. H. janthina Lef. from Venezuela must 

 be a closely allied species, but is described with the three 

 basal joints of the antennas flavous, with a distinct trans- 

 verse elytral depression and a bluish black under side. H. au- 

 rata Oliv. is mnch larger and differently sculptured. H. lam- 

 pros Jac. has a very iinely punctured thorax. In his diagnosis 

 of Hermesia Lefévre says that the terminal joints of the 

 antennse are much widened, this is certainly misleading, as 

 these organs are only very slightly thickened and elongate 

 in the type H. auratus as well as in the other species de- 

 scribed. 



Nodonota argentinensis sp. n. 



Aeneous, subopaque, the basal joints of the antennas 

 fulvous, thorax remotcly punctured, the sides angulate below 

 the middle, elytra remotely punctate-striate, the base with 

 some stronger punctures, the interstices finely granulate. 



Length 3— 3 Va mill. 



Head remotely and rather strongly punctured, without 

 any grooves, anterior margin of the clypeus concave emargi- 

 nate, basal joints of the palpi fulvous, antennse black, the 

 lower four joints flavous, terminal joints strongly träns ver- 



