the SeyrlieUes IshniJs (ind Aldahra. 181 



Coclious district at about 1500 feet, and in the forest above 

 Cascade Estate. 



The eleven specimens var\' in the development of the 

 oblique testaceous elytral fasciae, the posterior one being 

 sometimes obsolete and in one example (?) united to the 

 antejior one. The dissimilarly coloured sexes were obtained 

 in each island. M. biformis, from Ceutral America, and the 

 Euro])oan Morde/listena ahdonihialis are parallel cases of 

 sexual dimor})hism. M. disparilis ( ?) seems to be related 

 to M. ho'iHOchrou, Fairm., from Diego Snarcz, but without 

 comparison of types it would be unsafe to identify it with 

 tliat insect. The variety with confluent fascige Avas found in 

 a burrow in a stick in the jungle at Silhouette. 



MoRDKLLlSTENA. 



MordeUistena, Costa, Faun. Regn. Napol., Mordellid. pp. 16, 31 (1854). 



A genus of world-wide distribution and abundantly repre- 

 sented within the tropics. One species from the Seychelles 

 has been described by" Kolbe and three from jNIadagascar by 

 Fairmaire. Mordella castanea, Boh,, from Guam, and various 

 others from the adjacent regions referred to Morddla by the 

 older authors may belong here. j\Ir. Scott^s collections 

 include about two hundred specimens, belonging to seven 

 species. One of these insects was bred from larvae found 

 in the wood of Colea peduncu/afa. The appended table will 

 help in the identification of these closely allied forms. The 

 sexes have been identified in nearly every case by an exami- 

 nati(in of the genitalia of one or more examples of each 

 species. The antennal structure is completely ignored by 

 nearly all authors_, presumably owing to difficulties of 

 manipulation : — 



TiLial ai)d tarsal formula— 4 or 5, 3 or 4, 2, 2 ; 

 body uniformly coioiu-ed. 



Fourtii antennal joint as lorg as fifth niahena^ Kolbe. 



Fourth antennal joint nuieh shorter than tilth, deyressa, sp. n. 

 Tibial and tarsal formula — 4, 3, 2, 1 ; head in 

 J 2 , and prothorax also in (S , testaceous or 

 rufo-testaceous ; elytra cinereo-bifasciate . . partilis, sp. n. 

 Tibial and tarsal formuia— 3, 3, 2, : fuurth an- 

 tennal joint short ; body uniformly coloured, 



fusco-castaneous, robust colea-, sp. n. 



Tibial and tarsal lormula— 3, 2, 2, ; iburtli an- 

 tennal joint short. 

 Body uniformly coloured, fusco-castaneous, 

 feiTuginous, or testaceous above. 

 Antennal joints o-ll elongate sejitemcarinaia, sp, n. 



