﻿443 



The Australian genera may be separated as follows : They 

 all 'belong to the sub-group with closed clavus: 



1. Antennae reaching plainly beyond eyes 2. 



;a. Antennae not reaching as far 3. 



2. Frons transverse, angulate laterally 4. Dardiis Stal. 



2a. Frons scarcely wider th'an long, roundly ampliate on each 



side I . Gedrosia Stal. 



3 Pronotum and scutellum together about as wide as long 



2. Platyhrachys Stal. 



3a. Pronotum and scutellum together, wider than long 4. 



4. Frons strongly carinate and excavate 



6. Gelastopsis, gen. nov. 



4a. Frons flat or only slightly rugose; lig'htly carinate 5. 



5. Tegmina elongate, narrow. . . .5. EitroiwtohracJiys, gen. nov. 

 5a. Tegmina shorter, broader 3. Olonia Stal. 



The Australian Eurybrachyini are probably all Eucalyptus- 

 feeders; EuroiiofobracJiys arcnata was found always in grass, but it 

 had probably been blown or fallen from l:iicalyf>tns. 



Gedrosia Stal. 



Gedrosia Stal 1862 O. V. A. F. XIX 448. 

 I. Euryhrachys varia Walker 1851, List. Horn. 394. 

 Unknown to me. 



Flafybraehys Stal. 



PlatybraeJiys Stal 1859 Eugenie's Resa. Ins. 280, and 1861 K. 

 Vet. Ak. Handl. 3 No. 6, p. 67 and 1862, O. V. A. F. XIX 448. 

 A large number of Australian species have been described, 

 none of which however have I 'been 'a'ble to identify. In the 

 lirst work cited, Stal figures the type, but the structure of the 

 head and of the clavus are not like any Australian forms I have 

 seen ; in the second work the genus is included among the forms 

 with open apex to clavus ; in the third (one year later) among 

 those with closed apex! In the forms aboiut to be described the 

 clavus is closed, but is not acute. The genus is badly in need of 

 revision. 



I. oeulata, sp. nov. 



Head testaceous, sometimes tinged with olive brown ; prono- 

 tum and scutellum sordid castaneous, abdomen mostly black; 

 anterior and intermediate legs castaneous, except the black. 



