Ivi 



Dr. Fritz Mtiller also sent enlarged outlines of theneuration of various 

 Lepidoptera, in order to point out the homologies that appeared to exist with 

 that of the Trichoptera, of which an outline of the wing of GhjphidotauUus, 

 copied from Kolenati's • Genera et Species Trichopterorum,' was placed 

 side by side with those of the Lepidoptera. Mr. M'Lachlan called 

 especial attention to the neuration of Castnia Ardalus as delineated by 

 Dr. Miiller, and compared it with that of Hydropsyche as figured in his 

 ' Kevisiou and Synopsis of European Trichoptera.' He stated that it had 

 long been his opinion that in a linear arrangement the orders Lepidoptera 

 and Trichoptera should not be widely separated. 



Mr. Stainton called attention to the great resemblance existing between 

 the neuration of Micropteryx in the Micro-Lepidoptera and that of certain 

 Micro-Trichoptera. 



Prof. Westwood was not convinced of the existence of that amount of 

 homology insisted upon by Dr. Fritz Miiller and the preceding speaker, 

 and said that it was desirable that the supposed homologising nervures 

 should be coloured, so as to be more readily traceable. 



Mr. Wood-Mason asked Mr. M'Lachlan whether he had noticed any 

 homology between the maxillae of Lepidoptera and Trichoptera. The latter 

 stated in reply that there was considerable resemblance in the form of the 

 maxillary palpi of Micropteryx and some other Micro-Lepidopterous genera 

 and those of Trichoptera, especially in the excessive development of these 

 palpi as compared with the labial, these latter being usually the most 

 prominent in Lepidoptera. 



The Rev. A. Eaton exhibited a piece of " Kungu cake " from Lake 

 Nyassa. According to Livingstone and others this substance is used 

 extensively as food in the region referi'ed to, and is made by the natives of 

 large quantities of a minute insect, whose habit is to fly in dense cloud-like 

 flights often similar in appearance to columns of smoke. These subsiding 

 upon the herbage along the borders of the lake accumulate to a considerable 

 depth, and are then collected en masse, pressed into cakes, and dried for 

 consumption. Until now the " Kungu fly " has been conjectured to be a 

 species of the Ephemerida. ; but on actual inspection it proves to be a 

 minute representative of the CuUcid(B, and (so far as can be ascertained 

 from the material at hand) of the genus Corethra. Its wing measures 

 2*5 mm. in length. Drawings of details accompanied the specimen. These 

 are intended for publication in an account of Capt. Elton's journey from 

 Lake Nyassa to the north-eastward, which is in the press, the specimen 

 exhibited having been entrusted to Mr. Eaton by the editor of this work, 

 the Rev. H. Waller, of Tywell. The condition of the compressed 

 examples precludes an exact determination of the species being made from 

 them. It is possible that " Kungu cake " in other localities may be com- 

 posed of other materials. 



