vili Preface. 



Latreille, Considerations Generales sur I'Ordre Naturel des Animaux, 

 1810; Laporte, Essai d'une Classification Systematique de I'Ordre des 

 Hemipteres, 1832; and Westwood, Introduction to the modern classi- 

 fication of Insects, Synopsis, 1840. Most of these writers .have in a 

 few cases named two or more types in which cases the next single 

 valid type fixation has been accepted. 



In giving the genotypes I have adopted the names proposed by Mr. 

 O. F. Cook in 1914, for the three characters of types used in this list. 

 They are : 



Orthotype, type designated on founding the genus. 



Haplotype, an only species included at the time of founding the 

 genus but not specifically stated to be the type. 



Logotype, an original species subsequently selected as type. 



This classification of the types was instituted after my removal to 

 the west, so there are a few works to which I do not now have access 

 and therefore have been unable to name the character of the geno- 

 types. Such uncertain types have been entered sim.ply as " Type." 



The name of the type genus of families, subfamilies, etc.. has 

 not been given as it is sufficiently indicated by the name itself. 



Distribution is roughly indicated as follows: 

 Can. Canada. 



E. Eastern states to the Mississippi Valley and eastern Canada. 

 E. U. S. United States east of the great divide. 



Gt. PI. Missouri and Mississippi Rivers to base of Rocky ^Mountains. 

 N. Northern States and Canada. 

 N. E. Maryland to Ohio and eastward. 



N. W. Northern California to Idaho and British Columbia. 

 Pacif. Western Arizona and Nevada and coast north to British 



Columbia. 

 Rk. Mts. Wyoming, Utah, Colorado to New Mexico and Arizona. 

 S. New Jersey to Florida and Texas. 

 S. E. Connecticut southward to Georgia and Florida. 

 S. W. Western Texas to southern California. 

 W. West of the eastern slope of the Rocky Mountains. 

 • The following diacritical marks have been employed : 

 II indicates a preoccupied name. 



f indicates a name cited in error. 



