﻿I02 



Issidae. 



This family contains three subfamihes : 

 I Face not laterally angulate (2) 



1 a Face laterally angulate 3 Eurybrachyinae 



2 Hind tibiae with a spine or spines i Issinae 



2a Hind tibiae spineless in adults (but spinose in nymphs) .... 



2 Amphiscepinae 



Issinae. 



The following- table is amended from the first memoir : 

 I Tegmina reaching at least to apex of abdomen, clavus 

 sutured off from corium (2) 



1 a Tegmina in the form of narrow, elongate straps, reaching far 



beyond the apex of the abdomen ; wings rudimentary ; 



hind tibiae vvith two spines 10 Alleloplasts 



lb Tegmina abbreviated, clavus not sutured off from corium: 



wings rudimentary ; hind tibiae with one spine 



9 Gclastissit.': 



2 Wings reaching at least to apex of abdomen (3) 



2a Wings absent or rudimentary (6) 



3 Appearance Cercopoid ; wings deeply incised apically. . . (4) 

 3a Appearance Poekillopteroid ; wings not incised apically.... 



4 Tylana 



4 Frons longitudinally carinate, sometimes feebly ; inner fork 



of radial vein practically forming a straight line with the 



basal stalk of the vein (5) 



4a Frons polished, not carinate ; inner fork of radial fornung an 

 obtuse angle inwardly, with the basal stalk of the vein .... 

 3 Phaeopteryx 



5 Tegmina less than 2^ times as long as broad, inner fork of 



radial vein not reforking till just basal of the apical margin 



I Clihiuiydoptcvyx 



5a Tegmina over 3 times as long as broad, inner fork of radial 



reforking well basal of the apex of the clavus 



2 Apsadaropteryx 



6 Hnd tibiae with i spine 5 Lipocallia 



6a Hind tibiae with 2 spines (7) 



7 Hind margin of pronotum straight (8) 



7a Hind margin of pronotum widely emarginatc 6 Bilbilis 



8 Frons basally truncate, with a keel along the middle 



7 Hystcroptcrum 



