European Species of the Genus Cosmopteryx. 651 

 Thus if we construct the following table — 



Apical streak uninterrupted . . 



Extreme base 

 black. 



Entire base 

 brassy. 



Schmidiella. 



Druryella, Z. 



Apical streak interrupted, | 

 forming two spots. . . . j 



Ex'imia. 





we find that Mr, Brown's new species exactly fits into the vacant 

 square. 



At that time I did not propose a name for the insect, for not 

 having seen the species which had been bred from the Hierochloe, 

 I could not say whether they were identical ; I was, indeed, 

 rather suspicious that they might be, for on the 31st August, 

 1860, having received a further supply of the Ratisbon larvae from 

 Herr Hofmann, which fed well whilst in my possession, but had 

 soon devoured the limited supply of grass sent with them, I had 

 tried them with Arundo Phragmites, and found that the larvae 

 soon entered the leaves of that plant. However, it did not ulti- 

 mately suit them, and the larvae I had all died. 



In the autumn of 1860, I received from Herr Hofmann some 

 specimens of his insect bred from the H'lerochhe, and found that 

 they had the entire base of the wing brassy, and the apical streak 

 uninterrupted ; therefore they agree with the characters of Zeller's 

 Druryella, and unless some distinctive character can be detected 

 it must bear the name Druryella. 



In the "Entomologist's Annual" for 1861, p. 90, I proposed 

 the name Orichalcea for Mr. Brown's new species, taken also by 

 Mr. Farren in the New Forest, and of which I had found three 

 specimens in the British Collection of the British Museum. I 

 did not then describe the insect, but repeated the tabulation of 

 the four species already given in the "Entomologist's Weekly 

 Intelligencer," vol. 8, p. 198, giving simply the distinctive charac- 

 ters, thus: — 



" Orichalcea^ n. sp. Entire base brassy, apical streak inter- 

 rupted, forming two spots." 



The next step in the study of the genus was the publication in 

 the 6th volume of the " Annales de la Societe Entomologique 

 Beige" of a notice by Fologne on the habits and transformations 

 of the hop -feeding species, under the name of Cosmopteryx 



