﻿IV PREFACE. 



In this, as in the previous volumes, when the insects treated of are new, or the 

 existing descriptions of them are imperfect, or in a foreign language, or in works out 

 of print or difficult of access, 1 have added a full description, which is, however, always 

 printed in smaller type, so that it can be skipped by the non-interested reader. I have 

 endeavored to give a popular name to each insect of economic importance, and this 

 is invariably accompanied, wherever accuracy demands it, by the scientific name, and 

 the latter is generally printed in italics and mostly in parenthesis, so that it may be 

 skipped by the practical man without interfering with the text. The Order and* 

 Family to which each insect belongs, are generally given under each heading. The 

 dimensions are expressed in inches and the fractional parts of an inch. Where so small, 

 however, as to render such measurement inaccurate, I have adopted the milimeter — 

 one milimeter (1 mm.) not quite equaling twenty-five hundredths of an inch (0.25 inch.). 

 The sign d", wherever used, is an abbreviation of the word " male," the sign $ for 

 "female," and the sign § for neuter. 



Some of the figures are enlarged, but the natural size of each ot such is also given 

 or indicated by a hair-line, except in the representation of enlarged structural details^ 

 •where they are connected with the life-sized insect to which they belong. 



The name of the author of the species, and not of the genus, is given as authority ;, 

 and in order to indicate whether or not the insect was originally described under the 

 generic name which it bears, I have adopted the following plan : When the specifie 

 name is coupled with the generic name under which it was first published, the de- 

 scriber's name is attached without a comma — thus indicating the authorship of the 

 {\\x?i\ ndime: Q. g. Phycita 7iebulo Walsh. But when a different generic name is em- 

 ployed than that under which the insect was first described, the authorship is enclosed 

 in parenthesis thus — Aa-obasis nebulo (Walsh ;) except where the whole name is already 

 in parenthesis, when a comma will be used for the same purpose : e. g. {Acrobasia. 

 nebulo, Walsh.) 



All the illustrations, unless otherwise stated, are drawn by myself from nature 



Respectfully submitted, 



CHARLES V. RILEY, 



State Entomologists 

 St. Louis, Mo., March 14, 1877. 



