DISTANT— RHYNCHOTA. PART II: SUBORDER HOMOPTERA 291 



but it differs from that genus by the shorter and broader head and by the apex of 

 the face being broader, less produced before eyes and emarginate ; from Equirria it 

 differs by the longitudinal direction of the principal veins to the tegmina, the narrow 

 face and the long clypeus, nearly as long as the face, but is allied to that genus by 

 the shorter and broader vertex of head ; the tegmina are apically more narrowed than 

 in either of the above genera, for the venation of which the three figures given for 

 the three genera give a better guide than does a written description. 



170. Fordicidia robusta, sp. n. (Plate 51, fig. 15 a). 



Body and legs flavescent ; tegmina subhyaline, much suffused with pale fuscous, 

 in typical specimens as the one figured — three basal spots crossing claval area, two 

 longitudinal spots above them, followed by an irregular transverse series of spots and 

 subapical shadings, in some specimens these markings are much obliterated and the 

 spots diminished in number ; wings subhyaline, the veins darker ; vertex of head short, 

 triangular, but with eyes considerably narrower than pronotum ; mesonotum somewhat 

 obscurely tricarinate ; body short and robust ; face narrow, a little widened towards 

 clypeus, its lateral margins strongly ridged ; second joint of antennse long and in- 

 crassated, other structural characters as in the generic diagnosis. 



Long, excl, tegm. 2 to 2^ mm. Exp. tegm. 10 mm. 



Loc. Seychelles. Silhouette : forest above Mare aux Cochons. Mahe : Cascade 

 Estate, 800— 1000 feet and over; high forest behind Trois Frferes, 1500— 2000 feet. 



Genus NisiA. 



Msia Melich., Hom. Faun. Ceylon, p. 53 (1903); Dist., Faun. Brit. Ind. Khynch. 

 iii. p. 309 (1906). 



The position of this genus is still suh judice ; Melichar placed it in the Derbinse 

 and 1 followed him, though of course its aberrant structure among the Derbids cannot 

 be overlooked. Muir (Bull. H. S. P. Ent. xii. p. 29, 1913) writes of Nisia and two 

 other genera : " I exclude them from the family Dei-hidm, but, inconsistently, have 

 included them in this Bulletin because several of our greatest authorities on Homoptera 

 have considered them as Derbids." Muir seems inclined to the view that Nisia belongs 

 to the Cixiin83. Matsumura (Ann. Mus. Nat. Hung. xii. p. 287, 1914) places the genus 

 in the Achilinae. 



Under these qualifications I leave Nisia among the Derbids, a position which 

 perhaps does not seem congenial and from which it will probably be ultimately 

 transferred. 



171. Nisia atrovenosa. 



Meenoplus atrovenosus Leth., Ann. Mus. Genov. xxvi. p. 466 (1888). 



Nisia atrovenosa Melich., Hom. Faun. Ceylon, p. 58 (1903); Dist., Faun. Brit. 

 Ind. Khynch. iii. p. 309, fig. 150 (1906); Muir, Rept. Exp. Stat. Haw. S. Plant. Assoc. 

 Bull. 12, p. 81 (1913). 



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