396 The Philippine Journal of Science 1923 



Ophiuchus marginatus sp. nov. Plate 5, fig. 42. 



Pale ochraceous; vertex with an arcuate violet mark just 

 before apex, the median line and lateral margins to apex broadly 

 reddish. Pronotum with a median band basally, and broad 

 submedian longitudinal bands, reddish, the latter extending 

 across basal angles of scutellum. Tegmina hyaline, basal area 

 clouded with pale golden yellow, basal and commissural margins 

 of clavus broadly reddish. Length, 6.5 millimeters. 



Differs from 0. basilanus in structure as follows: Supra- 

 antennal carina not so strongly raised, the space between it 

 and border of carina broader, and traversed medially by a 

 slender carinate wrinkle. While the general outline of the 

 head is similar to that in other species, the course of the border 

 carina and the accompanying structures are entirely different; 

 the border carina curves inward before ocellus and has lying 

 within it a delicate sinuate carina which passes mesad of the 

 ocellus; the ocellus is less than its own diameter from either 

 of these carina* and about three times its diameter from eye. 

 Length of vertex (Plate 5, fig. 42, a) a little less than one and 

 a third times the interocular width; surface nearly plane and 

 entirely smooth except for a few indistinct longitudinal wrinkles 

 before apex. Tegmina (Plate 5, fig. 42, c) more broadly rounded 

 apically, the outer apical vein strongly curved, the two cross 

 veins m subcostal area lying close to apical cell, and the two 

 apical cross veins strongly dislocated. 



Straits Settlements, Singapore {Baker). This species dif- 

 fers so widely from the two preceding species that it is placed 

 m Ophiuchus with some doubt. The structure of the vertex is 

 unique, and the venation is very different in detail from that 

 01 the other species. 



Genus NIRVANOIDES novum 



Type, Nirvanoides amboinensis sp nov. 



Characters as stated in the generic synopsis. This genus rep- 

 resents an extreme development of the Nirvana type of jassoid 

 insects similar to the African Atritona Melichar as to length 

 of head though in that genus the outline of apex of head is 

 very obtuse, almost truncate. 

 Nirvanoides amboinensis sp. nov. Plate 5, fig. 43. 



Very pale ochraceous; vertex with a black point at apex, and 

 from this extend caudad two delicate submedian black lines, 

 widest apart on anterior half of vertex and gradually converg- 



