4 Ml'. IT, Scott on Corylopliiilre/com (lie 



from i\Iri(la<^a.scar in the subsequent literature. Riitter's 

 (1908) descriptions of E. At'ric:ui species have been studied, 

 but withoTit seeing specimens it is liard to pronounce on their 

 relationships with those of the Seychelles. In comparing 

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

 times found that the nearest to the Seychelles species are 

 Oriental forms, from Ceylon, Japan, &c. (c/. the distribution 

 of \\\e genevii Meioderus nnd Lewisinm, 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 

 injects. 



On the whole, the Seychellean forms are very minule, even 

 for Corylopliidce. In comparing, I have been repeatedly 

 struck with their small size in relation to their congeners. 



StuucTURE. — Various anatomical points are dealt with 

 under the headings of particular genera and species. Thus 

 seconrlary sexual characters have come to light in Rhypohins 

 and Orthoperus, and differential speciric characters in the 

 form of antennce and niouth-parfs in ceitain species of Sacium, 

 ISericoderas, and Leiiisiuin — in AS^cmw also in the form of the 

 j^rosternum. Attention is called to the presence of diverging 

 nielasternal strise in Orthoperus. 



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

 been examined, in the case of each ])articular species. I 

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

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

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

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

 dealt witii below, the remaining five being: — Arthrolipa 

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

 lips Jlavicollis, Mattli., Orthoperus mmutisdniiis, Matth., and 

 Orthoperus sp. indet., wings not examined ; Rhypohius aqui- 

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

 ^ , but seemingly quite absent in the $ . Tais last case is 

 interesting, exhibiting a sexual difference in the 'v^ing- 

 develoj)meht. The genus Rhynohius (= MoroniUus) is said 

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

 the hind wings quite absent. Matthews makes the less 

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

 absent in the -' genotype," R. marinuSy 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. 



