BY K. .1. TILFA'ARD. 389 



down along the coast it did not even begin to appear until late 

 in February. T, therefore, secured a pair for comparison with 

 my series of C. pygnuva. I was greatly surprised to find that 

 these were a very distinct, though closely allied, species. So far, 

 I have been unable to secure further specimens of the imago, Imt 

 during a visit to Medlow, in November, 1910, I obtained two 

 nearly full-fed larvae. I have, therefore, practically complete 

 material for a paper on this most interesting aberrant genus. 



In this paper, I propose to folhjw the lines of ray "M<jnograph 

 of the genus Synthemis" * in giving, besides full descriptions and 

 life-histories of the two species concerned, a discussion of the 

 position occupied by the genus in the subfamily CorduHina:, and 

 an attempt to solve the difficult problem of placing it in its correct 

 position in a linear classificatit)n. .-\s with Synthemis, so with 

 Coidulephya, it will be found that a knowledge of the life-history 

 is an indispensable part of the data on which any conclusion should 

 be ba.sed. Even if, as will be seen to be in some measure tlie case 

 jn this paper, the larval form does not fit in with our precon- 

 ceived notions and expectations — derived fiom the study of wing- 

 venation only — we must accept the facts as they arc", and try still 

 to .solve the problem which our knowledge has only rendered 

 more difhcult. 



As a careful comparison of the two species of the genus will 

 throw a good deal of light on the question of classification, I 

 propose to give descriptions and life-histories first. 8o that the 

 comparison may be made more easily, I will place the descriptions 

 side by side in tabular form. 



Genus CoRDULKPHVA de Selys. 



The characters of the genus, as given by de Selys, are partly 

 based on variable venational characters, and, therefore, need 

 enlargement, not only to include the new species, which is 

 essentially congeneric with the type C. pygriKca, but also to admit 



•These Proceedings, 1910, -xxxv., p.312. 



