DIABEOTICA. 523 



47. Diabrotica semiflava. 



Flavous, the head and breast black, the antennae fulvous ; thorax bi-impressed ; elytra flavous, the sutural and 

 lateral margins green, with three longitudinal spots at the base, and two transversely-shaped spots below 

 the middle, black. 



Length 2 lines. 



Head impunctate, black ; antenna? fulvous, the first joint green, the second and third joints short, the third 

 joint one half longer than the second ; thorax pale testaceous, narrowly margined with green, the disc 

 depressed on each side ; scutellum black ; elytra very closely punctured, the interstices somewhat rugose, 

 the disc flavous, the margins pale green, with three short streaks at the base (the middle one the narrowest 

 and situated at the sutural margin, the others at the shoulders), and a short transverse spot or band (not 

 extending to either margin) below the middle, black ; femora pale green, the tibia? and tarsi fulvous. 



Hab. Panama, Volcan de Chiriqui {Champion). 



48. Diabrotica cyaneo-maculata. (Tab. XXX. fig. 8.) 



Testaceous, the head and the breast black ; thorax bifoveolate, distantly punctured ; elytra closely punctured, 

 with a spot at the shoulder, the suture, and another spot below the middle, metallic blue. 



Length 2-2^ lines. 



Head impunctate, the frontal tubercles well developed ; antenna? entirely fulvous, the third joint one half 

 longer than the second ; thorax one half broader than long, pale flavous, the surface with some fine and 

 remotely placed punctures, bifoveolate ; scutellum black ; elytra distinctly and very closely punctured. 



Hab. Costa Rica ( Van Patten), Volcan de Irazu, Cache {Rogers). 



The anterior elytral spot is of elongate, the posterior one of rounded, shape, these 

 spots being placed in a line near the sides of each elytron. I), cyaneo-maculata may 

 be known principally amongst its allies by the sutural margin being entirely bluish, 

 which colour gradually widens out towards the base. The four specimens before me 

 show no particular variation, except in size. 



The Irazu specimen is figured. 



i. Elytra testaceous, with longitudinal Hack stripes and small spots, the latter 



sometimes absent. 



49. Diabrotica nigro-lineata. (Tab. XXX. fig. 16.) 



Diabrotica nigrolineata, Jac. P. Z. S. 1878, p. 149 \ 



Diabrotica oberthuri, Baly, Trans. Ent. Soc. Lond. 1886, p. 452 2 . 



Hab. Mexico, Teapa, Cordova {Salle) ; Guatemala 1 2 , Aceytuno {Salvin), Capetillo, 

 Cerro Zunil, San Geronimo, Purula {Champion). 



A comparison of the insect described under the above name by Mr. Baly with the 

 type of D. nigro-lineata in my own collection has proved to me their identity. There 

 are specimens of several closely allied species before me, of which the present one may 

 be known by the black head and the submarginal black line of the elytra ; this line 

 in nearly every individual curves round near the apex and extends to the suture. 



A specimen from Cerro Zunil is figured. 



3x2 



