THE 



TRANSACTIONS 



ENTOMOLOGICAL SOCIETY 



OF 



LONDON 



For the Year 1890. 



I, On the South American species of Disibvotica,. Parti. 

 By Joseph S. Baly, M.E.C.S., F.L.S., &c. 



[Read July 3rd, 1889.] 



In the present paper I have brought together all the 

 South American species of the genus Diabrotica known 

 to me, describing all those which appeared to be new, 

 and re-characterising those which from the original 

 brief and imperfect diagnoses required to be more fully 

 defined. Since the publication of my papers on the 

 Columbian Diabroticce I have received great numbers 

 both of specimens and species from various parts of the 

 South American continent ; my knowledge of the limits 

 of the various specific forms has thus been greatly 

 extended, and I have been compelled to sink a certain 

 number hitherto considered distinct into varieties of 

 other earlier described species. In this paper the genus 

 is divided into groups and sub-groups, which will, I 

 trust, greatly facilitate the work of the student. I must 

 beg to thank Messrs. Kirsch, Meyer, P. de Borre, Fry, 

 Jacoby, Duvivier, Donckier de Donceel, Staudinger and 



TRANS. ENT. SOC. LOND. 1890. — PART I. (APRIL.) B 



