Monographie der Ricaniiden (Homoptera). 33 7 



humeralis Walk. 



Ricania humeralis Walk., Journ. Linn. Soc. Zool., X, pag. 161, 200 (1870). 



5. Testacea, fronte tricarinata, facie non carinata, mesothorace tricarinato, alis 

 cinereo-hvalinis, alis anticis vitta costali ferruginea abbreviata apice nigricante stigmate 

 pallide testaceo, venis fulvis, venis transversis nigricantibus, alis posticis venis margina- 

 libus furcatis. 



9. Testaceous. Vertex and front with the sides slightly elevated; vertex verv shorf 

 front nearly twice as broad as long, with three slight abbreviated keels, the keel on each 

 side very remote from the middle one; face not keeled. Prothorax arched, four times 

 as broad as long. Mesothorax with three keels, the keel on each side connected with the 

 middle one in front, and diverging frora it hindward. Wings cinereous vitreous. Fore 

 wings with an abbreviated irregulär ferruginous costal stripe, which is blackish towards 

 its tip, and is interrupted by a large pale testaceous Stigma; veins tawny; transversa 

 veins blackish, forming about ten irregulär transversa lines; marginal veins not forked. 

 Hind wings with two lines of transverse veins; first line with only two veins, second 

 incomplete; three marginal veins forked. 



Length of the body 3^/2 lines, ofthe wings 10 lines. 



Mysol. 



hyalina Kirby. 



Ricania hyalina Kirby, Proc. Zool. Soc, pag. 555 (iJ 



Head yellowish; the carinae black, the clypeus marked with brown lines between 

 them; the middle carinae not projecting on the vertex, which is deeply and triangularly 

 depressed in the middle; thorax reddish above, the middle carinae yellow; abdomen 

 brown above, the sides marked with yellow, and the segments bordered with green 

 behind. Under surface of the body yellow, the femora, the extremities of the first five 

 Segments ofthe abdornen, and a large spot at each side at its extremity green; the base 

 of the first five abdominal segments rieh cream-colour. 



Long. corp. 5 mm., exp. al. 15 mm. 



Christmas Island. 



Aehnlich der Stacota pelliicida und Salona panorpaeformis Germ. 



impervia Walk. 



Ricania impervia Walk., Journ. Linn. Soc. Zool., X, pag. 151, 179 (1870). 



c?. Nigra, capite margine testaceo carinato, vertice brevissimo, fronte transversa 

 septemcarinata, prothorace arcuato unicarinato, scuto tricarinato, scutello unicarinato, 

 pedibus testaceis, alis latis nigrb-fuscis, alis anticis venis plurimis longitudinalibus 

 lineisque tribus e venis transversis. 



<S. Black. Head with a testaceous prominent border; vertex very short; front 

 broader than long, with seven slight keels, of which the three on each side are incom- 

 plete. Prothorax arched, four times as broad as long, with one keel. Scutum of the 

 mesothorax with three keels, the keel on each side diverging hindward from the middle 

 one; scutellum with one keel. Legs testaceous; coxae black. Wings broad, blackish 

 brown, with a bluish bloom beneath. Fore wings with very numerous longitudinal 

 veins; three lines of transverse veins, of which the first is irregulär, the second is slightly 

 undulating, and the third is nearly straight; transverse costal veins numerous, some of 

 them forked. 



