VI 
INTRODUCTION. 
species called Pinicolana, in 1850, whereas Zeller has a Grapho- 
litha under that name {vide p. 43) in the ‘Isis’ for 1846, a work 
not very accessible, as is the case with many others ; hence the cause 
of the difficulty of avoiding a duplicate name. Indeed few persons, 
except those engaged in similar researches, can imagine the almost 
utter impossibility of obtaining, either a knowledge of the various 
periodicals and pamphlets, in which new species of insects are de¬ 
scribed, or of procuring even a sight of the works themselves, when 
their titles are ascertained, either in our public or private libraries.’’ 
“ Other diversities of nomenclature unavoidably arise from dif¬ 
ferences of opinion in regard to the original names of the Vienna 
Catalogue, &c.: one of these may be here alluded to; viz., T. 
variegana as applied in the following pages to Peronea Abild- 
gaardana,* Doubleday. This name (variegana) is employed by 
Guenee as the specific name of Antithesia Cynosbatella—although 
previously used by him (Mi. p. 10) as a synonym to Abildgaardana 
— but it is evidently so employed in error: the ‘ Theresians’ say of 
variegana, in their appellative description, ‘ Gelblichtweisser W. 
mit dusterer Innenrandmackel, und buntem Untenrande, ’ which 
appears descriptive of the Peronea, and not of the Antithesia; the 
name is therefore hereafter applied accordingly : this leads to a final 
remark on the subject of specific names, viz., that the Theresian 
names are almost universally adopted in continental works, even 
when unaccompanied by descriptions, from the fact, that in the ma¬ 
jority of cases original specimens are said to exist in the Vienna 
collection ; and thus by adhering to a similar plan, there will be 
found a few names such as proximana, simpliciana, &c. restored, 
from the original specimens, bearing Haworth’s autographic names, 
* This name is posterior to Osbeckiana ; vide p. 18. 
