THE ENTOMOLOGIST. 



Vol. X.] AUGUST, 1877. [No. 171. 



VARIETY OF MELTT^^A ARTEMIS. 



Melit^a Artemis (var.). 



The accompanying figure, drawn by Mr. Willis and 

 engraved by Mr. Kirchner, represents a very curious variety 

 of AJelitaca Artemis, now in the collection of Mr. Samuel 

 Stevens, of Upper Norwood. It was obtained by its present 

 owner some years ago from an old British collection ; but 

 the precise locality of its capture is unknown. 



AN ABSTRACT OF A PAPER BY 

 Dr. H. GRENACHER ON THE EYES OF ARTHROPODS. 



By B. Thompson Lowni:, F.R.C.S., &c. 



(Concluded from p. 183.) 



11. The Structuke of the Facetted Eyes. 



The compound eyes of insects and crustaceans exhibit 

 great variety in their structure : the author describes them 

 under three distinct groups, which he names — 1. A conic 

 eyes. 2. Pseudoconic eyes. 3. Euconic eyes. 



They have been described by former observers as con- 

 sisting of — 1. A cornea, with more or less numerous facets. 

 2. A crystal-like cone behind each corneal facet, composed 

 of four cells united to each other, the primitive existence of 



2d 



