74 



elongate. Wings with a suiJernumerary cell. There is only one 

 snbapical cell in the tegmen (*). The ocelli are well-marked 

 and are on, or near, the apical margin of the vertex and are 

 visible dorsally. In the 3 genera known to me, the vertex i^ 

 obliquely striate, the pronotum finely granulate and the scutellum 

 ver}- finely punctured. The female genital segments are of the 

 usual Tetigoniine type, but the male plates are very long and of 

 characteristic appearance ; the valve is wanting. 



The structure of the head, of the venation and ci the male 

 plates distinguish this group very thoroughly. Macroccratogonia 

 has some affinity with these forms, but only females are known 

 at present; the interior discoidal cell is also divided by a trans- 

 verse vein in both the specimens I have seen. It has also great 

 affinity with the Tetigcniini and Penthimiini, but must at present 

 be relegated to a provisional tribe by itself. 



Eight genera of lassini are known. 

 I Vertex more than twice as long as wide, triangular pro- 

 duced 3 Muirella 



1 a Vertex not longer than wide {2} 



2 Fore femora and tibiae foliaccous 



8 Gabrita {^Pctolopoda )*" 



2a Femora simple (3) 



3 Pronotum keeled 7 lluv^ria 



3a Pronotum not keeled ( 4 ) 



4 Vertex expanded posteriorly behind the eyes; ocelli near the 



apical margin of the vertex ; anterior and p;«terior mar- 

 gins of the pronotum subparallel 5 Tiiwbreginiis 



43. \^ertex not expanded behind the eyes (5) 



5 Ocelli near the eves ; anterior margin of pronotum rounded 



'... ^ (6) 



5a Ocelli remote from the eyes ; anterior margin of pronotjji3i_^ 

 straight '. 6 Xeocdclidia 



6 Scutellum much shorter tnan pronotum 4 Palicns 



6a Scutellum not shorter than pronotum (7) 



7 Anterior tibiae curved 3 Tcrnlia 



7a .Vnterior tibiae straight (8) 



8 Frons rather flat, distinctly sutured ; tempora wide but short ; 



antennae inserted near the intero-posterior angles of the 

 eves I Icissns 



* It is true there are two in Tliarni JdliriKt. Ixit in the unique tyi>e of this, tlic 

 exterior discoidal cell is divided apical of its middle by a short transverse vein, which 

 is absent in the other species of tlie genus. 



♦* There is nothing in the descriptions of these to keep them apart. 



