xil INTRODUCTION. 
any real superintendence over the literary work undertaken by my assistant, and 
beyond the mere description of a few newly acquired or possibly overlooked species, 
the task has been left entirely in Mr. Durrant’s hands, and has been prolonged very 
far beyond my expectation as well as beyond his own. I greatly regret it has 
delayed the completion of the ‘Biologia’ so earnestly desired by Dr. Godman, but 
I hope that the thoroughness of the work done and the importance of the advance 
made in the general study of this interesting branch of entomology may afford some 
consolation and compensation for the patience with which it has been awaited. 
June 1915. | W ALSINGHAM. 

Census. 
27 Families enumerated, 2 described as new. 
225 Genera enumerated, 54 described as new, illustrated by 30 text-figures. 
1025 Species enumerated, 586 described as new, illustrated by 10 plates including 350 figures. 
1 Genus and 2 Species described as new from South America, and several species added to the 
fauna of the United States. 

Explanation of Signs, Abbreviations, ete. 
& = male. Q = female, o = sex not stated. 
@ = egg. @ = larva. >) = pupa. © = imago. 
* = invalid as not containing the Type of the conception. | 
+ = wrongly written either in inception or adoption. 
4 =a vernacular name. 
t+ = correction of a name previously wrongly written. 
§ =a homonym. || = a synonym. 
nn. = a neonym. IN, = a logonym, MN, = a mononym, 
PLI.=a Paratype. PIT. = Paratypes. AT.=a Homotype. 

Dionym = the name (onym) of a species as originally published in valid form, consisting of two 
terms, a species-name (idionym) combined with a genus-name (genonym). 
Idionym = a species-name (without reference to the genus). 
Genonym = a genus-name (without reference to the species). 
Mononym = a genonym published without exponents (invalid as not dionymic, and as having no 
indication of its application). 
Logonym = a mere printed name (invalid as having no indication of its application). 
Homonym = the same name applied to a different conception (invalid as already in use in another 
sense). . 
Synonym = a different name applied to the same conception (invalid, unless required to replace a 
homonym). , 
Isonym = a different name applied to a similar conception (potentially valid: genonyms restricted 
to different types are isonymous so long as their Types are regarded as congeneric) 
Neonym =a new name to replace a homonym. ; 
Drnt. 
