4 
General Catalogue of the Hemiptera 
radius is connected to media by two or more crossveins. These crossveins 
are frequently much shortened so that terminal branches of media may 
appear to be branches of radius. Media usually with three or more branches 
without constant arrangement. Cubitus 1 with two long branches usually 
connected by a distinct crossvein near the apical margin and cubitus la 
with a distinct crossvein to the sutural margin beyond the apex of the 
clavus. The clavus is short, with the claval veins united into a claval stem 
which unites with the apex of the clavus. 
The hind wings are moderately large with relatively simple venation. 
The male genitalia are somewhat reduced. The genital plates are small. 
The aedeagus is complex with an outer periandrium and a small inner 
penis. 
CLASSIFICATION ADOPTED 
The classification adopted in the present catalogue is the one proposed 
by Metcalf 1938. 
Family ACHILIDAE 
Subfamily APATESONINAE 
Subfamily ACHILINAE 
HISTORICAL RESUME 
The first species recognized in this family was Plata collaris , now Plecto- 
deres collaris described and illustrated by Coquebert in 1801. In 1818 Kirby 
described the new genus Achilus for a species flammeus from Australia. 
Zetterstedt added a new species Cicada conjinis now Cixidia confinis in 
1828, and another Cixius lapponicus now Epiptera lapponica in 1840. Say in 
1830 described three new species of Flata from the United States, which are 
now assigned to the genera Epiptera and Catonia. In 1839 Spinola reviewed 
the known fulgoroids of the world and included the new genera, Plectoderes 
and Elidiptera, with four new species. Amyot and Serville in 1843 proposed 
a new name Helicoptera for the latter. Unfortunately subsequent writers 
failed to realize that Duponchel in 1840 had selected callosa as the type of 
Elidiptera and that callosa was not congeneric with the Palearctic species 
which are now assigned to the genus Epiptera. 
Stal in 1866 was the first to propose that the genera related to Achilus 
be grouped in a family and in his Hemiptera Africana he gave a key to the 
then known genera. He also added many new genera and species between 
the years 1855 and 1870. Walker also described several new genera between 
the years 1851 and 1858. He also added many new species to this family, but 
many of the new species which he assigned to the genus Elidiptera do not 
belong to this family. Subsequently Uhler, Van Duzee, Kirkaldy, Distant, 
Muir, Haupt, Fennah and others have amended the definition of the family. 
Many authors have added new genera and species from various regions 
