DIABEOTICA. 567 



The metallic green bands of the elytra occupy in some specimens almost the entire 

 disc, leaving only the sutural and lateral margins together with the apices whitish- 

 testaceous ; the two black thoracic spots are constant in the numerous specimens 

 before me. 



A common insect on the slope of the Volcan de Chiriqui, and found chiefly on the 

 margins of the forest at an elevation of about 3000 feet ; a Chiriqui specimen is figured. 



k. Elytra green, the apices sometimes flavous. 



156. Diabrotica curtisi. (Tab. XXXI. fig. 10.) 



Diabrotica curtisii, Baly, Trans. Ent. Soc. Lond. 1886, p. 449 \ 

 Hob. Mexico \ Cordova {Salle), Jalapa (Hoge). 



In the males before me the head is only black at the vertex, the entire lower portion 

 being flavous ; in the female it is entirely black. The female is devoid of the subapical 

 elytral tubercle and excavation. 



157. Diabrotica longitarsis. (Tab. xxxi. fig. 11.) 



Flavous, the head black ; thorax trifoveolate, flavous ; elytra rugose, black, each with seven or eight longi- 

 tudinal costse. 



Var. Elytra with the lateral margin narrowly flavous. 



Length 2|-3 lines. 



Head impunctate, deeply foveolate between the antennae, very shining, black ; clypeus with a distinct central 

 ridge, its lower portion opaque and rugose ; antennae flavous, the sixth, seventh, and eighth joints, and 

 also the apical one, more or less fuscous, the third joint twice the length of the second, the terminal joints 

 thickened and much stouter in the male than in the female ; thorax very short and transverse, more than 

 twice as broad as long, the sides rather strongly narrowed at the base, the disc impunctate, flavous, very 

 shining, with a small basal and two larger central fovese ; scutellum black ; elytra closely rugose, each 

 with seven or eight narrow longitudinal costae commencing at the base but not quite extending to the apex, 

 the male with a longitudinal subsutural tubercle near the apex ; underside and legs flavous ; the first joint 

 of the posterior tarsi longer than the following three joints together. 



Hab. Guatemala, San Isidro, Zapote, Cahabon (Champion). 



Closely allied to the preceding species, and also to B. coryphwa, Baly, and D. viridi- 

 pennis, Jac. From I), curtisi it is separated by the elytra being black and differently 

 sculptured in the male ; from D. coryphcea by the entirely flavous colour of the under- 

 surface and the much longer first joint of the posterior tarsi, and also by the tubercle 

 near the apex of the elytra in the male. D. viridipennis has green elytra and the first 

 joint of the posterior tarsi shorter. D.flavo-limbata, Erichs. (=1). balyi, Jac), may be 

 known from D. longitarsis by the black thorax and the less numerous elytral costse. 

 The single specimen of the variety before me only differs from the type in having the 

 elytral margin flavous. An example from San Isidro is figured. 



