THE CANADIAN ENTOMOLOGIST. 115 



different parts of the field and even over the fence in the next one, while 

 the most distantly related species of the genus lie side by side. Is it 

 possible that such assemblages deserve to be treated as genera ! 



Mr. Scudder bears hard upon Herr Koch, because he divided the 

 Papilios according to the presence or absence of tails, as caudati, ecauaati, 

 etc., and calls it " an extraordinary case of the survival of the spirit of 

 mediaeval science ; would not have been excusable, scarcely tolerable, if 

 it had been proposed in the middle of the last century ; it is astonishing 

 that it was allowed to appear in the respectable journal of Stettin, and 

 of course they must drop/' etc. (Hist. Sketch'/. But really I do not see 

 why Koch should be thus flouted for dividing the Papilios in i860 by 

 their tails, when in 1875 Jasonides is pronounced by Mr. Scudder him- 

 self a satisfactory genus, " the hind wings tolerably long and tolerably 

 short tailed." Or Heraclides, " the hind wings tolerably short and broad 

 tailed." Why not the same sauce for both sexes of the goose ! 



Third Stirps Andropoda, 2nd family, 3rd coitus Zerene, thus defined : 

 " Wings bright yellow, black margined, red fringed," and here stand the 

 yellow species of Colias, namely, Palaeno, Caesonia, etc. In the 4th 

 coitus, Colotides, come the orange species of Colias, Edusa, Eurytheme, 

 etc., and it is defined, " wings above reddish-yellow with reflections, black 

 margined. 1 ' No more unreasonable than hundreds of other coitus, and 

 showing very clearly that a coitus is a group of less value than a genus, in 

 some cases. In others they are greater than a genus, as I have said ; and 

 if any of them are co-extensive with a genus, it is plainly by the merest 

 chance. I would note here that Colotides would certainly have embraced 

 the N.Am. Colias Eurydice, which is congeneric with Caesonia, but reddish, 

 while the latter is yellow. And the female of Eurydice would as certainly 

 have gone in a different coitus, had Hiibner known of it* 



In this Stirps, Pieris Schrank picks species from 1st family, 1st, 2nd, 

 and 8th to 12th coitus. 



Tachyris Wall, picks from 2nd, 3rd, 6th, 10th, nth, and also 2 species 

 from the 3rd Stips of the 1st Tribe, Napaeae ! 



Pontia Fab. selects from 1st family 4th, and 2nd family 2nd coitus. And 

 the 1 st coitus of the 3rd family has 2 species, both of which are put to 

 Dismorphia Hub., one of the coitus of 1st Tribe, 1st Stirps, Nereides ! 



* It appears from the above that the name Zerene, supposing a coitus name to 

 be applicable as a generic name, cannot be applied to the species Eurydice, and 

 therefore to Caesonia, as Mr. Soudder has done in his .Revision, Zerene only includ- 

 ing " bright yellow " butterflies. Let us respect Hubner as well as admire him. 



