258 Mr. F, Walker on some undescribed Ceylon Insects. 



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

 tracting vesicle ; b, hepatic globules. 



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

 not seen : a, hepatic globules. 



jFYjr. 18. Ditto, immediately after elimination: a, contracting vesicle; 

 b, hepatic globules ; c, posterior legs. 



Fig. 19. Ditto, empty capsule after elimination of PlcRSconia 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. Spliseridiadse. 



Cercyon vicinale. Luridum, ellipticum, capite nigro, palpis 

 pedibusque testaceis, thoracis disco piceo, elytris subtilissime stri- 

 atis. Long. \ lin. 



Fam. Hydrophilida. 



Berosus decrescens. Sordide testaceus, capite seneo, thorace 

 vitta lata guttisque dnabus lateralibus seneis, elytris subtilissime 

 striatis, punctis nonnuUis elongatis nigris. Long. 1-1 i lin. 



Fam. Buprestidae. 



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

 pite cupreo, thorace subtilissime punctato, elytris subtilissime 

 punctato-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. ElateridaB. 



CoRYM BITES BiviTTATA. Testacco-rufescens, capite piceo, antennis, 

 scutello et elytrorum vittis duabus marginalibus nigris, thorace 

 subtilissime punctato, elytrorum striis punctatis bene determinatis. 

 Long. 3|^lin. 



Ampedus acutifer. Niger, thorace subtilissime punctato, angulis 

 posticis testaceis acutissimis, elytris testaceis conferte punctato- 

 striatis, plaga apicali, sutura vittisque duabus abbreviatis nigris. 

 Long. 2-2i 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 humeri fer. Niger, angustus, elytris linearibus costatis 



