44 CEPHALuLKIA. 



and by the different form of the anal segment of the abdomen in 

 both sexes ; the insect is also somewhat shorter in proportion to its 

 breadth. 



0. Cephaloleia affinis, n. sp. B.M. 



C. elongata, subdepressa, rufo-fidva, nitida ; antennis (articulis 

 duol)US basalibiis exceptis) nigris ; his articiilo basali seciindo 

 dimidio longion, apicc oblique tnmcato et deorsum in dcntcm 

 aciitum prodncto. 



Mas. Abdominis segmento anaH sinuato. 

 F<jem. Abdominis segmento anali obtuse rotundato. 

 Long. 4-4i lin. 



C. elongate, subdepresscd, shining fulvous red ; antcnnaj (two basal 

 joints alone excepted) black ; eyes inceous. Head smooth, im- 

 pressed on the vertex with a deep fovea ; antennae mth their basal 

 joint (Tab. III. fig. 6a) compressed, slightly thickened, one-half 

 longer than the second, its apex obHquely truncate, and jjroduced 

 beneath into a short acute tooth ; remaining joints simple in both 

 sexes. Thorax transverse-quadi-ate, increasing in width towards 

 the apex in the male, parallel in the female ; sides straight, 

 rounded in front, produced beyond the apical border, outer border 

 dilated, reflexed ; apical margin slightly dilated on either side, its 

 middle portion indistinctly concave ; above moderately convex from 

 side to side, transversely depressed bcliind the middle, smooth and 

 shining, deeply but not very closely punctiired, puncturing coarser 

 and rather more crowded at the base ; lateral border deeply cana- 

 liculate. ScuteUum smooth, impunctate. Ehtra broader than 

 the thorax ; sides parallel, their outer border rctlexed ; apex ob- 

 tusely rounded ; above precisely similar in form and punctation 

 to Cephaloleia corallina. 



Male. Anal segment of abdomen (Tab. III. fig. 6 c? $ ) sinuate. 



Female. Anal segment of abdomen obtusely rounded. 



Hab. Para ; also from the Upper Amazons. Collected in both lo- 

 calities by Mr. Bates. 

 (5 in the collection of J. S. Baly ; 2 in British Museum. 



The fii'st five insects are similar in habit, and agree in ha\'ing the 

 second and third joints of their antennae in the male compressed and 

 dilated. They are connected A^ith the remaining portion of the genus 

 by the present species, which approaches so nearly in form and 

 colouring to Cepli. corallina, that it might easily be, and most pro- 

 bably frequently is, confoimdcd with that insect ; on an examination, 

 however, of its antennae, they -odll be found to have their second 

 and following joints simple in both sexes, thus at once proving it to 

 be distinct. The fenude differs from the same sex in corallina and 

 Erichsonii in the form of its basal joint ; this is shorter than in 

 either of the others, its apex being obliquely truncate and produced 

 bencatli into a short tooth. 



