258 Mr. F. Walker on some undescribed Ceylun Insects. 



Fig. 16. Ditto, becoming shorter, preparatory to encapsulation: a, con- 

 tracting vesicle ; b, hepatic globules. 



Fig. 17. Ditto, encapsuled, the contracting vesicle passive, and therefore 

 not seen : a, hepatic globules. 



Fig.X?). Ditto, immediately after elimination: a, contracting vesicle; 

 b, hepatic globules ; c, posterior legs. 



Fig. 19. Ditto, empty capsule after elimination of Plcesconia Charon : 

 a, elongated portion bearing the impressions of the granulated 

 ridges, in the midst of which is represented the aperture through 

 which the Plcesconia escaped. 

 Bombay, 



January 7th, 1859. 



XXVII, — Characters of some apparently undescribed Ceylon 

 Insects. By F. Walker. 



[Continued from p. 56.] 



Fam. Sphaeridiadae. 



Cercyon vicinale. Luridum, ellipticum, capite uigro, palpis 

 pedibusque testaceis, thoracis disco piceo, elytris subtilissime stri- 

 atis. Long. \ liu. 



Fam. Hydrophilidae. 



Berosus decrescens. Sordide testaceus, capite seneo, thorace 

 vitta lata guttisque duabus lateralibus seneis, elytris subtilissime 

 striatis, punctis nonnullis elongatis nigris. Long. \-\\ lin. 



Fam. Buprestidse. 



Agrilus cupreiceps. Niger, obscurus, subtus nigro-aeneus, ca- 

 pite cupreo, thorace subtilissime punctate, elytris subtilissime 

 puuctato-striatis basi impressis. Long 2-2| lin. 



Agrilus cupreicollis. Niger, fronte pedibusque anterioribus 

 cyaneo-viridibus, vertice thorace pedibusque posticis cupreis, ely- 

 tris confertissime punctato-striatis. Long. 1 \ lin. 



Fam. Elateridse. 



CoRYM bites bivittata. Testaceo-rufescens, capite piceo, antennis, 

 scutello et elytrorum vittis duabus margiualibus nigris, thorace 

 subtilissime punctato, elytrorum striis punctatis bene determinatis. 

 Long. 3\ lin. 



Ampedus acutifer. Niger, thorace subtilissime punctato, angulis 

 posticis testaceis acutissimis, elytris testaceis coiiferte punctato- 

 striatis, plaga apicali, sutura vittisque duabus abbreviatis nigris. 

 Long. 2-2^ lin. 



Ampedus discicollis, Luteus, antennis pedibusque testaceis, 

 thoracis disco nigro, angulis posticis acutis, elytris conferte punc- 

 tato-striatis, fasciis duabus dentatis nigris. Long. l|-2 lin. 



Fam. Lampyridae. 

 Lycus humerifer. Niger, angustus, elytris linearibus costatis 



