remarked that it hail been shown to Dr. Staudinger (now in London) by 

 M. Gueuee, and it was also unknown to him as European. 



JNIr. Distant exhibited a series of six examples of the butterfly Itliomia 

 Tutia, Hcwitson, from Costa Rica. These had been selected to show the 

 very considerable variation in markings to whicli the species is evidently 

 liable. 



Mr. Distant also communicated the following remarks on 



The Ehopalocera of Costa Eica. 



"In the 'Proceedings of the Zoological Society' for the year 1874, 

 Messrs. Butler and Druce published a paper on the ' Butterflies of Costa 

 Plica,' from a collection brought to this country by Dr. Van Patten. 

 Besides other Lepidoptera from Costa Rica, I have lately become possessed 

 of the remainder of a collection made in the same locality by Mr. Gabb, and 

 find the following species not included in the list of Messrs. Butler and 

 Druce. That Catalogue contained the names of 434 species, and it is 

 therefore very desirable in the interest of the study of geographical distri- 

 bution that a list so large and useful should be made as complete as possible. 

 I also find several distinct forms, of which I either possess or have seen 

 both sexes and series from Costa Piica : these I have described. The forty 

 species by which I have thus supplemented the Catalogue of Messrs. Butler 

 and Druce should together give a moderately complete analysis of the 

 butterfly fauna of Costa Piica, though probably more species of the family 

 Hesperidie may yet have to be added. 



•' As the value of these faunistic catalogues is principally in the study of 

 geographical distribution (a subject which I have for some time been 

 investigating), and their completeness is an essential necessity, I should be 

 glad to have this opportunity of asking entomologists who frame such lists 

 not to only give the species contained in one collection, but to include every- 

 thing previously recorded from the same locality. Specific differences 

 usually considered sliglit become factors of exceeding interest when dealing 

 with the problems of distribution and dispersion, and I feel confident it 

 will be chiefly by the records of these modifications (when co'istaut) tliat 

 we shall ultimately arrive at a knowledge of the laws of geographical 

 distribution. 



"I have strictly followed the arrangement of Messrs. Butler and Druce 

 in their paper. 



Family NyMPHALiD^ {Wcsiwood), Bates. — Subfamily DAXAiNiE, Bates. 

 Genus Danais, Latreille. 



Danais strigosa. D. strigosa, Bates, Ent. Mo. Mar/., i., p. 32, no. 1 1 (1864). 

 This species seems very abundant at Costa Rica. 



