MACKO-LEPIDOPTERA TAKEN AT KESWICK AND DISTKK'T. 283 



plentiful ; I have taken it about Barrow House ; varies much in size. 

 Chesias spartlatn, I found a large colony of this insect in 1892, in a 



field up the Greta opposite the Ash Tree Dub. Sionidae. Tanagra 



atrata, common almost everywhere ; plenty may be taken on the road 

 sides and adjoining fields, especially on the Borrowdale road, and on 

 the Lake road about Crow Park. 



INCOMPLETAE. — Sesiidae. Scsia fijmllformis, common in gar- 

 dens. Zygaeniuae. Ino statices occurs in the Great Wood but I 



have not taken it. Zygacna lonicerae, taken by Mr. Grecnip : Z. fiU- 

 penchilae used to be taken in a field behind Lingholm, I have not found 



it myself. Hepialidae. Ilejrialiis himnli, very common : II. sylvimts, 



not uncommon in Castle Head and Great Woods : H. rellcda, common, 

 especially on Skiddaw ; var. gaUicus I have taken on Ullock Moss : H. 



hqiidhius, not common : H. hectns, common in many woods. 



Cossidae. Cossns ligniperda, very rare. 



Including two or three doubtful species, the number of species 

 recorded in the foregoing list is 392, which is, I think, a very fair 

 show for such a small district, especially Avhen account is taken of the 

 short time I have been here, and the little time at my disposal for 

 collecting. Many of the woods and likely-looking fells have never 

 been worked at all, and neither moth-trajD nor light has as yet been 

 tried, so that I think that a collector with more leisure might reasonably 

 be expected to add very considerably to my list. Keswick is a very 

 interesting district to students of any branch of Natural history not 

 directljf appertaining to the sea. There are many rare birds and 

 animals in the district as well as some rare fish, numerous species of 

 flies, beetles, etc., and a very large variety of stones and minerals. 

 It will, doubtless, have been noticed that many of the common showy 

 species, such as Arctia caia, Zygnena fihpendidne, and Euchelia jacobaeae, 

 are absent or rare with us,. and, if any entomologist will be so good as 

 to help me, I should be glad of larvaj of such species to turn out, so as 

 to make the district more attractive to visitors and young collectors, 

 who occasionally bring their nets in the summer. 



I'he jJaderioid Qeriera witli jiairy Eyes. 



By A. EADCLiriM-: GROTE, A.M. 



The study of the sti-ucture of the eyes of the Owlet moths was 

 neglected by earlier systematists. The distinction between hairy and 

 naked eyes was drawn neither by Schrank, Ochsenheimer, Hiibner, 

 Boisduval nor Guence. In fact, so far as I am able to discover, it was 

 not until 1807, when Lederer wrote, that this character was generally 

 used as decisive. Although in the Diptera it Avould seem at times to be 

 of less service, in the LciJidoiitera it gives us a (piick and reliable 

 character for definition. But, naturally, in using this character in the 

 modern systems, the generic associations made by the older authors 

 without its use, become untenable. Not perhaps entirely owing to the 

 use of the structure of the eyes, for the characters upon which older 

 systematists as a rule founded their genera were of the vaguest. 

 The present brief summary of the results obtained in aj^plyiiig the 

 oldest generic names and ascertaining their exact types, will show tlie 

 difficulties which beset the nomenclator in dealing witli certain 

 Hadenoid genera with hairy and others with naked eyes. 



