36 Mr. J. S. Baly on new Genera and Species o/Phytophaga. 



irregularly crowded here and there over the surface ; sides more 

 closely punctured. Scutellum large, subtriangular, its surface 

 smooth, impunctate. Elytra scarcely broader than the base of 

 the thorax, rather more than three times its length, sides sub- 

 parallel, apex subacuminate ; surface somewhat closely covered 

 with large deep punctures ; slightly depressed below the humeral 

 callus, obsoletely crenulate ; on the inner disk, a short distance 

 from the suture, is a narrow, smooth, impunctate vitta ; this is 

 more distinct in some individuals than in others. Body beneath 

 strongly but distantly punctured. 



Most similar in form to C. Nacierii, but easily distinguished 

 from that insect by the subacuminate apex of its elytra. 



Genus Plagiodera, Redtenb. 

 Plagiodera cognata. 



P. ovata, postice attenuata, valde convexa, rufo-testacea, nitida ; 



oculis antennisque extrorsum nigris ; scutello elytrisque cupreis, 



his tenuiter punctatis, margiue laterali incrassato. 

 Long. 5 lin. 



Hab. Old Calabar. 



Very closely allied to P. thoracica, Fabr. ; more attenuated 

 posteriorly; sides of the thorax very slightly rounded, and 

 more quickly narrowed from base to apex, the anterior angles 

 less obtuse ; scutellum narrower, cupreous, with the exception 

 of an obscure rufous patch at its base ; elytra punctured as in 

 P. thoracica ; humeral angles less broadly rounded, rather more 

 prominent, sides tapering from a short distance below the shoul- 

 ders to the apex. 



Plagiodera Walleri. 

 P. rotundata, valde convexa, rufo-testacea, nitida ; oculis nigris ; 



antennis extrorsum fuscis ; scutello elytrisque cupreis, his tenuiter 



punctatis, margine laterali incrassato. 

 Long. 3§ lin. 



Hab. Zambesi River. Collected by Mr. Waller. 



Distinguished from the preceding species, as also from P. tho- 

 racica, by its much shorter semirotundate form ; thorax resem- 

 bling in shape P. thoracica, its sides being less obliquely con- 

 verging, more regularly rounded, and the anterior angles more 

 obtuse than in P. cognata ; scutellum intermediate in breadth 

 between P. thoracica and P. cognata, entirely cupreous ; elytra 

 punctured as in P. cognata, regularly rounded on the sides, not 

 attenuated behind ; apex broadly rounded. 



Genus Nice a. 

 Corpus elongatum, valde convexum. Caput exsertum ; facie per- 



