On the Ceylonese Species o/Adoretus. 587 



LXIX. — On the Ceyhnese Species of Ruteline Cohoptera 

 belonging to the Genus Adoietus. By GILBERT J. 

 Arrow. 



(Published by permission of the Trustees of the British Museum.) 



In my paper on tlie K^utelinse of Ceylon, published in the 

 Ann. & Mag. Nat. Hist, for September 1911, I enumerated 

 thirty-one species in all, but reserved the genus Adoretus for 

 further consideration later. Previous to the publication of 

 that paper only a single species of the genus had been 

 recorded from the islai:d. Fourteen are now known to me, of 

 which one very widely distributed species, A. versutus, Har., 

 is the only one certainly occurring elsewhere. The list of 

 species will no doubt be considerably increased yet, for the 

 genus is evidently peculiarly well represented in Ceylon, 

 although, owing to the generally nocturnal habits of the 

 insects and their inconspicuous colouring and aspect, they 

 have received little attention. Although never of very 

 brilliant or attractive appearance, some of the largest and 

 most striking members of this enormous genus, with the 

 exception of some iuhabiiing the Madagascan Region^ are to 

 be found in Ceylon. Tliey are destructive insects, devouring 

 the leaves of roses^ cannas, and other cultivated plants. 



The following is the list of the Ceylonese species at present 

 known : — 



A. ntavis, Arrow. 

 A. hicaudatus, sp. n, 

 A. ursus, Arrow. 

 A. leo, Arrow. 

 A, ermineus, sp. n. 

 A, rugosHs, sp. n. 

 A, smghalensis, Ohaus, 



A. versutus, Har. 

 A. Jhmnalhi, sp. n. 

 A. in fans, sp. n. 

 A. mus, sp. n. 

 A. suturalis, sp. n. 

 A. corpulentus, sp. n. 

 A. celoyaster, sp. n. 



" IVigonostoma na7ia,^^ Walker, attributed to Adoretus in 

 the Munich Catalogue, is a species of Apogonia. 



The types of the new species here following are in the 

 British Museum. Most o£ the species were found by 

 Mr. E. E. Green. 



Adoretus hicaudatus, sp. n. 



Brunneus, dense griseo-setosus, elytrorum areis denudatis et densius 

 tectis longitudinaliter alternantibus ; pygidio ante apicem bi- 

 penicillato : minutus, angustus, toto dense punctatus, opacus, 

 pedibus posticis brevibus, crassis. 



Loner. 8-10 mm. : lat. 3-5-5 mm. 



