Mr. W. L. Distant on Homoptera. 209 



tliree small spots at base ocliraceous; pvonotum with the 

 margins (narrowly), a central discal longitudinal fascia, and the 

 incisures ochraceous ; mesonotum with two obsolete central 

 obconical spots, only denoted by their outer margins and 

 apices, lateral margins (narrowly) and anterior angles and 

 centre of cruciform elevation ochraceous ; abdomen above 

 black (apex mutilated in type) ; body beneath stramineous; 

 face piceous ; space between face and eyes, and many irre- 

 gular spots to sternum, black ; legs pale castaneous, apices 

 to femora ochraceous ; tegmina and wings semihyaline talc- 

 like, tegmina with the venation brownish ochraceous and 

 on basal area spotted with fuscous, two angulated fuscous 

 fascise on apical areas ; wings with angulated fuscous spots 

 on outer area, the outer margin pale hyaline ; costal tegminal 

 membrane, and extreme bases of both tegmina and wings, 

 ochraceous. 



Long., excl. tegm., ^ (abdomen mutilated) ; exp. tegm. 

 49 mm. 



Hab. South Africa {Drege^ Brit. Mus.). 



Genus Platypedia. 



PlatypecUa, Uhler, Ent. Am. iv. p. 23 (1888). 

 Type, P. areolata, Uhler ( Cicada) . 



Genus Arcystasia. 

 Arcystasia, Dist. Proc. Zool. Soo. 1882, p. 133. 

 Type, A. Goddefroyi, Dist. 



Genus Derotettix. 

 Derotettix, Berg, Anal. Soc. Cient. Argent, xiv. p. 11 (1882). 

 Type, D. mendosensis, Berg. 



Derotettix Wagneri, sp. n. 



Head and thorax above olivaceous green; vertex of head, 

 margins of pronotum, and cruciform elevation pale testaceous ; 

 area of tlie ocelli, a central longitudinal fascia to pronotum, 

 two central, anterior, obconical spots to mesonotum, and disk 

 of cruciform elevation black ; abdomen pale olivaceous , 

 thickly greyishly tomentose, segmental margins pale testa- 

 ceous, and a central longitudinal fascia (broadest at base) 

 piceous ; body beneath and legs ochraceous, greyishly 

 tomentose ; face olivaceous ; posterior margin of metauotum. 



