INTRODUCTION 
The present catalogue of the Family Eurybrachidae forms Part 18 of 
Fascicle IV of the General Catalogue of the Homoptera of the World 
which is devoted to the Superfamily Fulgoroidea. This was virtually com- 
plete at the time of the death of Dr. Z. P. Metcalf on January 5, 1956. It 
was completed with the aid of Miss Virginia Wade, Research Analyst, 
who has been working with Dr. Metcalf for the past seven years, and the 
technical advice of Drs. David A. Young, Jr. and Paul W. Oman of the 
Entomology Research Branch, Agricultural Research Service, United 
States Department of Agriculture. 
The catalogue of the remaining fulgoroid families and of the Cicadellidae 
is practically complete to the end of 1955 and we plan to publish these re- 
maining portions under Dr. Metcalf’s authorship. 
Since the fulgoroid catalogues began to appear in print several changes 
have occurred in the classification of higher categories. One of the changes, 
the establishment of the Family Gengidae, can be covered more readily in 
this than in any of the remaining unpublished portions of the Fulgoroidea 
catalogue. The writings of Fennah (Ann. Mag. Nat. Hist. (12) 2 : 111-120, 
1949) and of China and Fennah (ibid. 5: 190-199, 1952) have been heavily 
drawn upon for the following summaries of family characteristics. 
The Family Gengidae may be characterized as follows: Head with vertex 
triangular, slightly depressed; beak with subapical segment much longer 
than apical; antennae with third joint minute. Mesonotum short, disc de- 
pressed; tegulae small, partly overlapped by pronotum; forewings tapering 
apieally beginning at claval apex, basal cell small or larger and ovate, 
principal veins strongly carinate; hind wings reduced. Hind leg with 
trochanter rotating laterad in horizonal plane; tibia trispinose laterally 
and with five spines apieally, basal tarsomere not inflated, as long as second 
and third tarsomeres combined, with five apical spines; second tarsomere 
without apical spines. Abdomen dorsoventrally flattened, with lateral 
sclerites. Included are two species in two genera. 
The Gengidae are known only from Africa. 
The Family Eurybrachidae is characterized as follows: Head with width 
of vertex three times length, or more; width of head including eyes equal 
to or exceeding width of pronotum; front wider than long with lateral mar- 
gins normally angulate near middle; elypeus usually not carinate; antennal 
flagellum unsegmented. Mesonotum short, broadly triangular; tegulae 
moderately large to large, not or only slightly overlapped by pronotum; 
forewings not steeply tectiform, costal and commissural margins not or 
only weakly divergent, apical margin not oblique, or if so, then with sutural 
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