118 



the apex. Wings with median vein undivided. Abdomen with 

 hin dangles of dorsal segments much produced. Suj^ra-anal 

 lamina of female quadrate." 



The nine species recorded by Brunner are all South American^ 

 also all those under section 1, 7 and 8, by Saussure and Walker. 

 It is therefore quite probable that all those from Asia, Africa, and 

 Australia, cited by tlie two last authors, do not belong to this 

 genus, especially as ">^. g7'anicoUis,'^ Sauss. (Section 6), has been 

 suggested as synonymous with O^iiscosoma castanea, Brunner, but 

 this can only be decided by studying the types. 



Zetoboka antica, Walker (Brit. Mus. Cat., 47). 



" Blackish, elongate fusiform ; testaceous beneath. Head 

 black, shining, transversely impressed between the antenna? 

 testaceous towards the mouth, also the palpi. Antennas half 

 the length of body. Pronotum with rellexed margins, minutely 

 and darkly tuberculate, testaceous, semihyaline, angular, sj^ace 

 behind not excavated, hindmargin hardly rounded, outline of 

 l^lackish part angular, laterally notched. Elytra ferruginous, con- 

 colorous. Wings grey, lurid towards the costa. Legs tawny. 

 Sub-anal (? !) lamina entire. Cerci piceous or tawny. 



Length of body (both sexes) ... 18-20 mm. 



Length of elytra 24-26 " 



Habitat. — Australia. 



OxiscosoMA, Brunner (Syst., 298). 



Zetobora, Saussure ; Laxta, Walker (young form;. 



Males winged, females wingless. Pronotum lenticular, exceed- 

 ing the head very much, lateral angles of male rounded, of 

 female acute, hindmargin of male rounded, of female subtruncate; 

 in the middle (above the head) more or less cucullate. Elytra of 

 male A'^ery much longer than the abdomen, wings as long as 

 elytra, very broad anteriorly. Meso- and meta-notum of female 

 wdth the hindangles very much produced. Legs short, rather 

 thick. Abdomen of male ovate or suborbicular ; of female 

 ovate, dorsal marginal appendages much exceeding the ventral. 

 Supra-anal lamina of male transverse, obtuse ; of female quad- 

 rate, angles obtuse, subdupiicate in the middle or emarginate. 

 Cerci of male about three times as long as the lamina, Avith ten 

 to twelve joints ; ot female dilated, shorter than the lamina. 

 Subgenital lamina of male much produced, rounded ; styles 

 reflected. 



The genus contains only two species, and is limited to Aus- 

 tralia. It rejDresents here the Heteroganiida, which it resembles 

 in asjDect and habits ; the latter l)eing very abundant in Africa. 



1 



