22 ]\Ir. II. Scott on Corylopliiclfe /»•<??» the 



ill Malie, from country above Port Glau'l, 500-1000 feet, 

 and from tlie forest on Casca'le. Estate, between 800 and 

 2000 toet ; Piasliii, Cotes d'Or Estate. 



T>EWisiUM, Mattliews. 



(PI. III. figs. 25-28, 30; PI. IV. fi-s. 31, 32, 34, 35.) 



Lewisium, Matthews, Mou. Corj-lophidas, 1S99, p. 164, pi. v. fig. A. 



Lewishim was establislied for two s})ecies — L. ceylonicum, 

 Matth. {op. cit. p. 166), and L.Japoniatm, Matth. {op. cit. 

 )). 1*37), and no further representative of the genus has since 

 been described. My material contains a long series of a 

 epecies from the Seychelles, which is referred to Lewisium 

 on account of its A'ery close general resemblance to L. cey- 

 liiiicum, but which in the form of its antennae and mouth- 

 ])arts differs from that species and in some ways more closely 

 lesenibles Catoptyx hoicringi, Matth. (Java), the type of 

 the genus Ca/o/?/j/.f*. Tlie Seychelles form (L. seychellea- 

 juim, sp. n.) thus seems in some respects intermediate between 

 the types of Lewisium and Catoptyx, ami an examination of 

 the actual parts in L. ceylonicum and L. aeychelleanum, and 

 comparison with Matthews's figures of Catoptyx renders one 

 rather doubtful whether the differences between Z/et^-?5a</H and 

 Catoptyx are more than sj)ecific. But one of the chief 

 diagnostic characters of Catoptyx is that it has the anterior 

 aiuiles ofthe pronotinn ahruptly infexed and closely fitted to 

 the tildes ofthe head, and of this there is no trace in L. sey- 

 chclleamun. Therefore 1 do not propose to sink Lewisium as 

 a synonym of the earlier name Catoptyx. 



Antetincp^ mouth-parts, d;c. — Tlie antenna of L. seychelle- 

 anum (figs. 25, 25 o) has the basal joint much thicker, the 

 third joint proportionate ly much longer, than that of L. cey- 

 lonuum (figs. 26, 2Qa). This forms a ready means of 

 distinction in balsam -preparations. The labrnni of L. sey- 

 cheWeonxivi (fig. 27) is intermediate between that of Leioisium 

 and tiiat of Catoptyx hoicrinyi as figured by Mattliews 

 (copied in figs. 28, 29), being considerably more tapering 

 than the former but niucli less acununate than the latter. 

 The mandiJiIes of L. seychelleannm are bifid at the distal 

 extremity, each of the two apices being armed with two or 

 three hooks (figs. 30, 30a) — i. e., rather more complex than 

 those of Cotoptyx lionrivyi, which, according to Matthews 

 (pi. vi. fig. B4), have only a single hook at each apex, but 



* Catriptyx, ilatthe\v.«, Ann. it Ma^r. Nat. Hist. (5) vol. xix. 1887, 

 p. Ill ; Won. Cor} loph idee, p. 107, ])1. vi, lig. B 1-7. 



