INTRODUCTION. vii 
Of these genera, 17 are also recorded as found in the West Indian Islands, whilst 
Alydus, Stenocephalus, Neides, and Corizus are also well known in Europe. 
Amongst the Tertiary insects of North America, Mr. Scudder has recorded the 
presence of the genera Cydamus, Protenor, and Corizus. 
Lye¢z1pa#.—Our statistical comparison in this family is only applicable to the Nearctic 
fauna, as the genera and species enumerated by Prof. Berg as representing the 
Argentine fauna are manifestly inadequate in number, ‘This is not surprising when we 
remember that the capture of the members of this family requires, in many cases, 
acquired knowledge of their habits. In the Argentine Republic collecting or field 
entomologists are few in number, but in North America the case is different, and in 
Central America we had the services of Mr. Champion, who had previously collected 
Rhynchota in England. | 
I have been able to determine 54 genera and 175 species of Lygeidze from Central 
America, as against 40 genera and 87 species in Prof. Uhler’s list of the Nearctic 
Heteroptera, and 18 genera and 31 species recorded as found in the Argentine Republic. 
The distributional analysis of our 54 genera is as follows :— 
Nearctic genera, z.e. Central Am. gen. also found north of Mexico. . . 7 
Neotropical genera, 7. e. » ” » south of Panama. . . 7 
Neogean genera, 2. e. ” », found north of Mexico and also 
south of Panama. . . . . «© «© 1 ee ew ew ew ew we ee dB 
Genera at present only recorded from Central America. . . . . . . 26 
Genus at present only recorded from Central America and Polynesia . . 1 
Of the above genera, 8 are also recorded from the Antilles, but the large number 
at present known as peculiar to our fauna is evidently only in relation to the many 
now for the first time described, some of which will be doubtless found to have also a 
more southern habitat. The Lygeide are often widely distributed throughout the 
world, and 17 of our genera have that ubiquitous character :— 
Europe, Asia, Africa, Australia . 
Europe, Asia, Africa 
Asia, Africa, Australia . 
Europe, Asia . 
Africa, Asia 
Europe . 
Polynesia . 
HK apwDdvovwneew 
Our genera are also well represented in Mr. Scudder’s list of the Tertiary insects of 
