222 THE YOUNG NATURALIST. 



However, they are still considered distinct by most Continental lepi- 

 dopterists, and have been differentiated by Mr. 'Stainton ; while the 

 late Mr. Sang, who probably knew as much of these species as any 

 one, was convinced of their distinctness, as also is Mr. Porritt, who 

 knows both species in a state of nature, and who has paid great 

 attention to, and carefully reared them. The food-plants of the two 

 species are very different, and one ochrodactyla (dichrodaciylus) is popu- 

 larly called in Britain the " tansy-feeder," while the other, bertrami, 

 is known as the " yarrow-feeder." Again, Mr. South seems to have 

 ignored the statements of Mr. C. G. Barrett ("Entomologist's Monthly 

 Magazine," Vol. XVIII., p. 177) relative to the difference in the manner 

 in which the two species feed in nature. Mr. Barrett considers that "the 

 habits of the larvae seem certainly to point to the distinctness of these 

 two species." Mr. Porritt, " Entomologist's Monthly Magazine," Vol. 

 XXIII., p. 163, writes : " Any one having experience with both species 

 alive, can scarcely help noticing the differences." This was written 

 in 1886, and, hence I assume, was meant directly to question Mr. 

 South's conclusion of November, 1885 ("Entomologist," Vol. XVIII., 

 pp. 279-282). 



In the " Entomologist's Monthly Magazine," Vol. II., pp. 137-138, 

 Mr. Stainton writes : — " At Frankfort, last month, I noticed in the 

 collection of my friend, Herr Miihlig, a new plume closely allied to 

 ochrodactylus, bearing the name dichrodaciylus. The following day I 

 visited Dr. Rossler, at Wiesbaden, and again I saw the same insect, 

 only with him it bore the name ochrodactylus, and for the other species 

 a new name was proposed of bertrami. Which is the veritable ochro- 

 dactylus will probably be a very nice question. Herrich Schaffer has 

 no doubt figured dichrodaciylus under that name, but the very faults 

 which he finds with Hiibner's figure would imply that Hiibner had 

 represented the other species. I am also disposed to think that the 

 ochrodactylus of Zeller is also dichrodaciylus ; for the present, and to 

 avoid confusion, it may be advisable to drop the name altogether. 

 We have in lieu thereof the two species dichrodaciylus, Miihlig, and 

 bertrami, Rossler. Herr Miihlig has described his dichrodactylus in the 

 ' Stettin Entomologische Zeitung,' for 1863, p. 113. Dr. Rossler has 

 described his bertrami in the eighth volume of the ' Wiener Entomo- 

 log. Monatschrift,' p. 53." Mr. Stainton also adds: " Dichrodactylus 

 has the apex of the anterior wing more prologed, more falcate than in 

 bertrami, and the brown scales on the hind margin of the third feather 

 of the posterior wings should be more distinct. The best character, 

 however, is furnished by the hind-legs : in bertrami the tibiae are 



