DIABEOTICA. 531 



m. Elytra entirely green or flavous. 



66. Diabrotica dissimilis. (Tab. xxix. fig. 19.) 



Diabrotica tenella, Baly, Trans. Ent. Soc. Lond. 3rd ser. ii. p. 348 (1865) (nee Lee.) \ 



Var. a. Elytra flavous, narrowly margined with, green. 



Tar. b. Entirely flavous, the four apical joints of the antennae fuscous. 



Bab. Mexico \ Toxpam, Oaxaca, Playa Vicente, Capulalpam {Salle), Cordova, Jalapa 

 (Edge) ; Guatemala, Paraiso, Las Mercedes, Cerro Zunil, Zapote (Champion), Duenas 

 (Salvin); Nicakagua, Chontales (Belt); Panama, Caldera in Chiriqui, Tole, San Feliz 

 (Champion), near the city (Boucard). 



I have examined the type of this insect, and find that many of our specimens agree 

 with it in having the upper surface uniformly green. The above-mentioned varieties 

 only differ in colour. These latter have three or four of the apical joints of the antennae 

 fuscous, and the elytral punctuation, as well as everything else, agreeing with the type. 

 Some examples also are intermediate in colour between green and fulvous or flavous. 



The name tenella having already been used by Leconte for another species of the 

 genus, I am obliged to change it. 



67. Diabrotica impressipennis. (Tab. XXXI. fig. 17.) 



Head and the intermediate joints of the antenna? dark fulvous ; thorax green, deeply bifoveolate ; elytra with 

 a deep impression before and another below the middle, bright green, very shining; femora green; 

 beneath (including the abdomen) flavous or fulvous. 



Var. Thorax rufo-piceous, the elytra and legs obscure flavous. 



Length 3 lines. 



Head impunctate, the frontal tubercles distinct ; antenna? with the first joint green, the sixth, seventh, and 

 eighth joints obscure piceous, the terminal one fuscous, the second and third joints very short and nearly 

 equal ; thorax subquadrate, impunctate, deeply bifoveolate ; scutellum piceous ; elytra very finely and 

 closely punctured, transversely depressed before and below the middle, the intervening space at the sides 

 with a semilunate depression. 



Hah. Panama, Volcan de Chiriqui (Champion). 



Although the two specimens obtained differ totally in coloration, they agree entirely 

 in the elytral sculpture and other particulars. The elytra have, in addition to the 

 above-described depressions, some obscure and very short costae on the anterior portion, 

 and are also very shining in appearance. By this latter character alone the species 

 may be at once separated from unicolorous specimens of B. dissimilis. 



n. Elytra green, with piceous markings. 



68. Diabrotica piceo-notata. (Tab. XXXI. fig. 1.) 



Fulvo-piceous, the antennae (the apical joint excepted) flavous ; thorax green, with piceous markings, without 

 fovea?; elytra closely punctured, dark green, obsoletely spotted with piceous at the base and also on the- 

 disc ; tibiae and tarsi pale green. 



Length 4 lines. 



3y2 



