306 PERCY SLADEN TRUST EXPEDITION 



Long. excl. tegm. 5 to 5^ mm. Exp. tegm. 14 mm. 



Loc. Seychelles. Mahe : high forest of Morne Blanc and Pilot, circa 2000 feet ; 

 slopes of Morne Seychellois, 1500—2000 feet. 



Ambarvalia, gen. nov. 



Vertex of head considerably produced in front of eyes, about as far as from 

 anterior margins of eyes to base of head, a little widened on apical area, centrally 

 longitudinally carinate, the carination becoming bifid in front of eyes, the margins 

 elevately carinate, face prominently extended in front of eyes, apex somewhat conically 

 rounded, widened towards posterior margin, centrally longitudinally carinate ; clypeus 

 short, broad, less than half the length of face, centrally carinate ; antennae with 

 the first and second joints distinctly incrassated, second much longer than first ; 

 pronotum only a little shorter than mesonotum, strongly tricarinate ; mesonotum tri- 

 carinate, the disk moderately raised and flattened ; posterior tibise with a strong apical 

 spur which is serrate on its inner margin ; tegmina four times longer than broad, 

 veins longitudinal, on inner margin of apical area are two short oblique veins. 



I have only seen one carded specimen of this very interesting genus, the details 

 of the under surface being thus indescribable. 



206. Ambarvalia pyrops, sp. n. (Plate 51, fig. 1 a). 



Black ; the carinations to vertex, pro- and mesonota obscurely ochraceous, the 

 posterior margins of the latter two being also more or less finely spotted with the 

 same colour ; tegmina finely spotted with greyish and ochraceous, the apical area 

 unspotted ; anterior and intermediate tibise basally and apically annulated with ochraceous, 

 apex of posterior tibise including the apical spur ochraceous, posterior tarsi with the 

 apex of first joint and the whole of second joint, ochraceous ; structural characters 

 as in generic diagnosis. 



Long. 4 mm. 



Loc. Seychelles. Mahe, near Morne Blanc, about 1000 feet. 



Family CercopidsB. 



Only one species belonging to this family is contained in the collection. It is 

 in the Ethiopian region that the genus which contains this species is more largely 

 represented and Madagascar contributes its largest and most showy species. 



Subfamily Aphrophorinse. 



207. Ptyelus mahei. 



Ptyelus mahei Dist., Trans. Linn. Soc, Ser. 2, Zool. xiii. p. 45, Plate 4, 

 fig. 14 a (1909). 



Loc. Seychelles. Silhouette: near Mont Pot-a-eau, over 1000 feet; highest forest, 

 over 2000 feet; Mare aux Cochons, about 1000 feet. Mahe: fi:om near Morne Blanc 

 and high forest of same ; high damp forest at summit of Pilot, over 2000 feet ; 

 high damp forest between Trois Freres and Morne Seychellois, about 1500 — 2000 feet; 

 Cascade Estate, 800 — 1000 feet; forest near Mount Harrison, 1700 feet. 



