vi INTRODUCTION. 
species is too limited to allow comparative deductions to be made thereon—we arrive 
at the following conclusions, derived of course, from present information only :— 
Nearctic genera, 7. e. Central Am. gen. also found north of Mexico* . . 11 
Neotropical genera, i. e. » » » south of Panama . . 48 
Neogean genera, i. e. ” » found north of Mexico and also 
south of Panama. . . - oe oe 20) 
Genera at present only recorded from Central America ae .. . 18 
Genus at present only recorded from Central America and the Oriental Region 1 
Of these genera, 26 are also found in the Antillean sub-region; but the records of 
the Rhynchotal fauna of these islands are still very imperfect, and our knowledge is. 
almost confined to Cuba and Jamaicaf. The following genera have also a wide 
distribution outside the American continent :—Canthophorus—Kurope, Japan ; Pangeus 
—Australia, New Zealand; Onalips—West Africa ; Geotomus—Europe, Asia, Africa, 
Madagascar, Australia; Audinetia—India and the Malay Archipelago; Podisus— 
Europe, Asia; Nezara—Europe, Asia, Africa, Australia; Piezosternum—Tropical 
Africa. 
In his Monograph of the Tertiary Insects of North America, Mr. Scudder has 
included the genus Cyrtomenus as representing the remains of a fossil species found in 
the Tertiary beds at Green River. 
CorEIDaZ.—This family, consisting of large and conspicuous insects seldom absent 
from collections, may also be considered as moderately well enumerated in most 
faunistic works, and hence we may with considerable certitude compare our list of 
Central-American genera and species with those already referred to of the Argentine 
Republic and of North America. Central America is thus shown to possess 75 genera 
and 210 species, as compared with 84 genera and 59 species recorded by Prof. Uhler 
from the Nearctic region, and 36 genera and 60 species enumerated by Prof. Berg as 
belonging to the Argentine fauna. | 
Analysing the distribution of our 74 genera, the following results are obtained :— 
Nearctic genera, é. e. Central Am. gen. also found north of Mexico . . 14 
Neotropical genera, 7. e. »” 3 » south of Panama . . 33 
Neogean genera, 2. é. ” » found north of Mexico and also 
south of Panama. . . . . . . . re f°) 
Genera at present only recorded from Central America | 
* T here follow the method of Dr. Sclater, as applied to the species of Mammalia, in the Introduction to the 
volume devoted to that Class in this Publication. 
+ The results of the Antillean expedition of Mr. H. H. Smith are not yet published. 
