The Rev. A. E. Eaton remarked, ajyrojyos of the homologies of wing- 

 nervures (see Proc. Ent. Soc, 1878, p. Ivi.), that in the anterior wings of 

 most of the EphemeridcB, three primary groups of longitudinal nervures 

 could be distinguished, the foremost proceeding directly from the thorax ; 

 the hindermost issuing from, or terminating in, a curved or angulated 

 prominent fold interjacent between the first group and the hinder part of 

 the base of the wing close to the wing-root ; and an intermediate group 

 which does not attain to the thorax, but either terminates in the wing- 

 membrane close to the base of the wing, or is annexed to the hinder veins 

 of the first group. The equivalents of the intermediate group in their 

 ultimate ramifications constitute the "apical forks" of Mr. M'Lachlan's 

 system. Mr. Eaton exhibited drawings of wings of Trichoptera and 

 Tineina, in which the three groups of nervures were distinguished by colour, 

 and the "apical forks" were shaded and numbered, in correspondence with 

 their liomologies. 



Mr. Meldola communicated the following note on a remarkable case of 

 mimicry observed by Dr. Fritz Miiller: — "I have just reared from the 

 caterpillar state ten specimens (being five males and five females) of Eueides 

 pavana. This is one of our rarest butterflies, and I think I have not yet 

 caught more than half-a-dozeu, all of which were females. These resemble 

 Acrcea thalia so closely that before they are caught they can be distinguished 

 only by tlie club of the antennae being yellow, while it is black in Acrcea. 

 Now in the male of Eueides jjcivana the club of the antennae is black also, 

 and this has no doubt been the cause of my never catching any male. 

 I know of no other case in which the males of a mimicking butterfly 

 resemble more closely the mimicked one than the females do, while the 

 inverse is well known to be of rather frequent occurrence." 



Papers read. 



Mr. A. G. Butler communicated a paper " On the Lepidoptera of the 

 Amazons collected by Dr. James W. H. Trail during the years 1873 to 

 1875. Part iii., Noctuites." 



Mr. C. 0. Waterhouse communicated a "Description of a new Genus 

 and Species of Rhyncophorous Coleoptera allied to Sipalus found in an 

 Orchid-house." 



Mr. F. Moore communicated " Descriptions of the Species of the Lepi- 

 dopterous Genus Kallima.'" 



New Part of ' Transactions.'' 



Part iv. of the 'Transactions' for 1878 was on tlie table; as were also 

 copies of the President's Anniversary Address delivered at the last Meeting. 



