AUG -9 1948 
INTRODUCTION 
The present catalogue of the Family Achilidae forms Part 10 of Fascicle 
IV of the General Catalogue of the Hemiptera of the World, which is de¬ 
voted to the Superfamily Fulgoroidea. 
CHARACTERS OF THE FAMILY ACHILIDAE 
The Family Achilidae is one of the medium sized families of the Fulgo¬ 
roidea. The present catalogue contains 77 genera and 224 species. Most of 
the species are fulgoroids of moderate size, with strongly depressed bodies 
and the tegmina usually overlapping beyond the apex of the clavus. 
The head is usually small, narrow and short, frequently not over half as 
wide as the thorax, and very seldom produced into a distinct cephalic 
process. The vertex is sometimes broader than long, sometimes distinctly 
longer than broad, usually flat and separated from the frons by a distinct 
carina. The median carina may be present, indistinct or absent. The lateral 
margins may be strongly elevated or indistinct. The frons and clypeus are 
typically large, with a distinct median carina and lateral margins distinctly 
marginate. The compound eyes are usually large, with a distinct ventral 
sinus. The antennae are small, with the first segment usually short; the 
second globose or obovate; the flagellum moderately elongate. The paired 
lateral ocelli are situated on the lateral area of the head in front of the com¬ 
pound eyes. 
The thorax is conspicuous, with the pronotum usually short and collar¬ 
like, sometimes more elongate and tricarinate. The mesonotum is large or 
very large, rhomboidal, tricarinate; with the anterior margin strongly pro¬ 
jecting cephalad. The tegulae are usually large. The legs are usually slender 
and short. The hind tibiae somewhat elongate, with one or more short 
spines or without spines. Second segment of hind tarsi large, with a row 
of small, stout spines at the apex. 
Tegmina always macropterous; the basal two thirds usually distinctly 
thickened, with the apical third usually distinctly separated from the basal 
area and overlapping, somewhat as in the Heteroptera. The venation is of a 
fairly constant pattern and may be described briefly as follows: Subcosta 
and radius united for a considerable distance from the base, the subcosta 
with two or more short branches to the costal margin frequently forming a 
more or less conspicuous stigma-like area. Radius unbranched until im¬ 
mediately before the apical margin, where it forms two short branches 
which resemble the branches of the subcosta and continue the series of 
short cross veins from the apex of the costa around the apical angle. The 
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