APHTHONA. 363 



entirely impunctate ; scutellum pieeous ; elytra wider at the base than the thorax, snbcylindrical, nearly 

 parallel, regularly and distinctly punctate-striate to the apex; first joint of the posterior tarsi as long as 

 the two following joints united. 



Sab. Mexico, Ciudad in Durango (Forrer). 



Of a more slender and elongate shape than A diversa and A. obscuripennis, the elytra 

 more strongly punctured and of a bluer tint. 



6. Aphthona championi. 



Below obscure fulvous; antennas pieeous ; thorax and legs fulvous; elytra metallic green or blue, closely and 

 finely punctate-striate. 



Length 1 line. 



Head impunctate, obscure fulvous, the vertex pieeous or obscure seneous ; frontal tubercles almost obsolete ; 

 carina rather short and broad ; antennae pieeous or black, the three basal joints sometimes obscure dark 

 fulvous, third joint scarcely longer than the second, the latter swollen ; thorax transversely subquadrate, 

 slightly narrowed at the base, the surface rather convex and entirely impunctate; scutellum blacky 

 triangular ; elytra obsoletely and transversely depressed below the base, the latter appearing somewhat 

 swollen, disc closely and finely punctate-striate, the punctures finer and less distinct at the apex; apices- 

 of the posterior femora pieeous. 



Hab. Mexico, Cordova (Salle); Guatemala, Chacoj, and Cahabon in Vera Paz 

 (Champion). 



Larger and more robust than A. diversa : the base of the elytra raised and the punc- 

 tuation arranged in very close rows; the frontal tubercles in this species are less 

 distinctly marked than is generally the case— they might almost be called absent; the 

 punctuation of the elytra is only visible under a strong lens (a character which will help 

 to distinguish this species from others with very fine punctuation), and their colour is 

 blue or green. In the specimen from Mexico the sides of the breast, as well as the 

 apices of the posterior femora and their tibiae, are pieeous, but I cannot find any other 

 differences of importance. The general shape of the species is more elongate than is 

 the case in many others of the genus, and at the same time rather larger and robust. 



7. Aphthona semipunctata. (Tab. XXI. fig. 22.) 



Below pieeous ; basal joints of the antennas, head, thorax, and legs fulvous; elytra obscure greenish-aeneous, 

 extremely finely punctured. 



S^iJptnctate ; the frontal tubercles scarcely visible ; carina distinct and narrow ; four or five lower joints 

 of the antennas pale fulvous, the rest obscure fuscous, second joint much thickened, as long as the third, 

 the following joint distinctly longer; thorax rather transverse, one half broader than long, subquadrate, 

 the sides slightly rounded, obliquely angulate in front of the anterior angles, surface impunctate, an obsolete 

 depression at each side near the base ; elytra convex, not widened behind, very obsoletely depressed below 

 the base of a pale greenish seneous colour, their surface minutely punctate-striate (only visible under a 

 strong lens) ; posterior femora darker fulvous ; first joint of the posterior tarsi as long as the two following 

 joints united. 



Hab. Guatemala, Aceytuno (Champion) ; Panama, Caldera in Chiriqui (Champion). 

 The specimens sent by Mr. Champion differ sufficiently from A. diversa and similarly 

 coloured species to be looked upon as a distinct form ; the frontal tubercles almost 



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