CICADIDAE FROM NEW GUINEA 381 



This line species of which I have only seen one female spe- 

 cimen is probably the largest Cicada in existence , — at least 

 it is so according to present knowledge. — In P. 'imperatoria,, 

 Westw. the females are always smaller than the males, and are 

 probably so in the case of P. gigantea here described. 



Auta, n. gen. 



9 . Body moderately long and slender. Head broad, including 

 eyes a little wider than the anterior margin of the mesonotum ; 

 the vertex concave in front; the basal margin of the face di- 

 stinctly and very robustly incrassated; ocelli about as far apart 

 from eyes as from each other. Pronotum with the lateral mar- 

 gins almost straight. Anterior femora distinctly and prominently 

 spined. Tegmina and wings hyaline; tegmina with the basal cell 

 very long ; apical areas eight ; interior ulnar area about as wide 

 at apex as at base; wings with five apical areas. 



This genus is allied to Rustia, Stài, from which it differs by 

 the non-produced vertical angles of the head, the incrassated 

 basal margin of the face , the non-sinuated lateral margins of 

 the pronotum etc. 



The description is founded on two female specimens, which 

 prevents a proper diagnosis being made as to the tympana and 

 opercula. 



5. Auta insignis, n. sp. — Body above brownish ochraceous, 

 inner border of the incrassated basal margin of face, three 

 small lineate spots between eyes; two central fasciae, the inci- 

 sures and two discal lineate spots to pronotum ; 'two small spots 

 on mesonotum in front of the anterior angles of basal cruciform 

 elevation, black. Body beneath brownish-ochraceous ; central spot 

 and margin to face black (these markings very indistinct in a 

 second specimen) ; femoral spines and apices of the tibiae black ; 

 tarsi more or less black. 



Tegmina and wings pale hyaline, venation piceous, the first 

 with the costal area brownish-ochraceous, and with a large costal 

 opaque castaneous spot above upper ulnar area. 



