172 REPORT— 1889. 



Hopatrum, Fabr. 



EooJceri, F. Bates. 

 Omophlus, Sol. 



distinctus, Cast. 

 Meloe, Linn. 



Scabriusculus, Brandt ? prox. — The solitary specimen is too much 

 damaged for positive identification, but it has the same 

 very short thorax as scabriusculus, and similar sculpture 

 on the elytra. 

 Mylahris, Fabr. 



circumjiexa, Chevr. 

 duodecimpunctata, Oliv. 

 Silbermanni, Chevr. 

 variabilis, Pall., var. tricincta, Chevr. 

 Included in the collection there are also a few species belonging to 

 ■other families of Coleoptera : — 

 Fam. GarabidcB. 



Oalosoma sijcophanta, Lin. — A fine variety, in which the elytra 



are almost entirely of a brilliant golden coppery hue. 

 Acinopus, sp. ? 

 Fam. Trogositidce. 



Trogosita {Alindria, sp.). 

 Fam. Scarabceidce. 



Phijllognathus Silenus, Fabr. 

 Oryctes nasicomis, Lin. 

 Tropinota, sp. 

 Oxythyrea stictica, Lin. 

 Oxythyrea amina, Fairmaire. 

 Fam. Ghrysomelidce. 



Timarclia scabripennis, Dej. 

 ,, turbida, Erichs. 

 ,, pimelioides, Schaf. ? 

 Fam. Goccinellidce. 



Coccinella septempunctata, Lin. 

 Fam. Buprestidce. 



Julodis intricata, Redt. ? ? 



Fourth Report of the Committee, consisting of Professors Tilden 

 and Armstrong (Secretary), appointed for the purpose of in- 

 vestigating Isomeric Naphthalene Derivatives. {Drawn up by 

 Professor Armstrong.) 



The study of naphthalene derivatives has been prosecuted in the 

 reporter's laboratory during the past year with far greater success than 

 could have been anticipated, chiefly owing to the untiring energy and 

 skill of Mr. W. P. Wynne ; valuable assistance having also been rendered 

 by several students. The results are, it is believed, of considerable 

 importance from a theoretical point of view, not merely in relation 

 to naphthalene derivatives, but in connexion with the general problem 

 of the nature of the changes involved in the production of isomeric 

 compounds. 



