APHTHONA. 365 



I do not think it probable that this species is a variety of the preceding ; the thorax 

 is more transverse, and shows traces of a transverse depression at each side ; the elytra 

 are without the slightest trace of punctures, even when seen under a high magnifying- 

 power, and, lastly, their colour is a pale testaceous ; in the absence of other specimens I 

 must look upon this species as distinct. 



11. Aphthona maculipennis. 



Ovate, convex ; light brown ; base of the antennae and the legs pale fulvous ; head, thorax, and elytra entirely 



impunctate, the latter with an obscure transverse band before and a spot below the middle testaceous. 

 Length \ line. 



Hab. Guatemala, Tamahu in Vera Paz, San Geronimo {Champion). 



This small species will not be difficult to recognize, on account of its coloration and 

 entirely impunctate upper surface ; the frontal tubercles are here absent, and there is 

 a kind of groove, more or less distinct, near the inner margin of the eyes ; the antennae 

 are longer than half the length of the body, and have their third and fourth joints of 

 equal length and little longer than the second, the four basal joints are pale fulvous, 

 the rest black ; the sides of the thorax (which is of the usual shape) are marked with 

 an indistinct piceous spot ; the anterior testaceous band of the elytra is slightly curved, 

 extending upwards along the suture to the base, while the spot at the apex is more 

 indistinct, and in one specimen scarcely visible ; the posterior femora are rather darker 

 than the others. Two specimens only were obtained. 



12. Aphthona variabilis. 



Elongate, subparallel, fulvous ; vertex of the head and the elytra metallic greenish-aeneous ; head and thorax 



distinctly punctured ; elytra closely and rather strongly punctate-striate. 

 Var. Head and thorax entirely obscure aeneous. 

 Length 1-1 1 line. 



Hab. Panama, Volcan de Chiriqui {Champion). 



There is a great difference in the shape between the male and female sex of this 

 species, the latter being less convex and much more elongate than the male. • Other 

 characters to separate A. variabilis from the allied similarly coloured species may be 

 found in the more or less distinctly punctured head, the similarly punctured thorax, 

 and the closely and strongly punctured elytra ; the punctuation of the latter is, espe- 

 cially in the female, rather irregular, and the interspaces are slightly rugose near the 

 base, where there is a very obsolete depression visible ; the antennae have the third 

 joint scarcely longer than the second, and the terminal joints are often of an obscure 

 fuscous colour ; in the variety the metallic colour of the elytra has also extended to the 

 head and thorax, which, however, show traces of the fulvous ground-colour shining 

 through ; the colour of the head and the distinct punctuation of the thorax is constant 

 in all the specimens before me. 



