4 ^Ii'. TT. Scott 071 (/or}loj)lii(Uo/r(n7i the 



IVoni ^ladaojiscar in tlie subsequent litrratuie. Roitter's 

 (li)OS) tl('scii[)tions of E. AtVicrin species have been studied, 

 but witliout seeing specimens it is hard to pronounce on their 

 vehitionships with those of the Seychelles. In comparing: 

 the latter with forms in Matthews's collection, I have several 

 times found that the nearest to the Seychelles species are 

 Oiiental form«, from Ceylon, Jaj)an, &c. (cf. the distribution 

 of the genera Meioderus and Lewis'unn, mentioned above), but 

 the resemblance is not generally very close. However, if 

 these apparent indications of Oriental affinities should prove 

 genuine, this would only tally with what has been found 

 so strongly marked in certain other groups of Seychelles 

 insects. 



On the wliole, the Seychellean forms are very 97iiinite, even 

 for Cort/lophiche. In comparing, I have been repeatedly 

 struck with their small size in relation to their congeners. 



StkucTUKE. — Various anatomical points are dealt with 

 under the headings of particular genera and species. Thus 

 secondary sexual characters have come to light in Ehi/pohius 

 and Orthoperus, and differential specific characters in the 

 form of antenna; ^n(\. month-parts in certain species of Sacium, 

 Sericoderus, and Leuisium — in /S'rtcmmalso in the form of the 

 jirosiernuvi. Attention is called to the presence of diverging 

 metasternal strise in Orthoperus. 



The condition of the hind wings is stated, so far as it has 

 been examined, in the case of each particular species. I 

 follow Matthews in using the term "ample" to denote that 

 the wings are not reduced, vestigial, or absent, but much 

 longer than the elytra, under wliich they are folded. It 

 appears that they are ample in ten out of the fifteen species 

 dealt with below, the remaining five being: — Arthi-olijys 

 sp. indet., wings present but could not be examined ; Arthro- 

 lips flavicollisj Matth., Orthoperus minutisi>inius, Mattli., and 

 Orthoperus sp. indet., wings not examined ; l{h//pohius aqui- 

 /mws, sp. n., wings present and longer than the elytra in the 

 (J, but seemingly quite absent in the ? . Tliis last case is 

 interesting, exlubiting a sexual difference in the wing- 

 developmeiit. The genus Uhypohius ( = Moronillus) is said 

 by Ganglbauer (Kaf. JMitteltur. iii. pp. 273, 283-4) to have 

 the hind wings quite absent. IMatthews makes the less 

 general statement (Mon. pp. 172-3) that these organs are 

 absent in the " genotype," R. marinus, Leconte, but says 

 nothing of their condition in the other species. In a pair of 

 the European R. ruJicoUis (Duval) which I have examined I 

 find no trace of hind wings in either sex. I have not investi- 

 gated their condition in other species of the genus. 



