316 Mr. F. Walker on undescribed Species 0/ Homoptera. 



longer than the lateral pair. Fore wings not angular, much rounded 

 at the tips ; costa slightly convex ; veins and veinlets few. 

 This genus is most nearly allied to Oxygonia. 

 Omolon tridens (PI. XV. f. 1). Foem. Flavus ; vertex nigro bivittatus ; 

 thorax vittis quinque, annulis duobus elongatis spinisque nigris ; pedes 

 fuln ; alffi anticte vitrese, venis nigris, margine exteriore feiTugineo. 



Female. Yellow. Vertex with two black stripes. Thorax with 

 five black stripes, of which two pair on each side are connected hind- 

 ward ; a looped black spot on each side hindward ; spines black ; 

 middle spine yellow at the base. Legs tawny. Wings vitreous; 

 veins black, thick. Fore wings ferruginous along the exterior border. 

 Length of the body 3 lines ; of the wdngs 7 lines. 



Para. 

 Omolon varius. Fmn. Niger ; vertex albidus, nigro bivittatus ; tho- 

 rax guttis pkuimis maculisque sex posterioribus albidis, spina media 

 albido fasciata; tarsi flavescentes; femora autica obscui-e fulva; alas 

 anticge vitreae, litura postica marginali nigricante, venis albidis. 



FemaU. Black. Vertex whitish, with two black stripes. Thorax 

 with nimierous whitish dots, some of which are confluent in front ; 

 three large whitish spots on each side ; middle spine with a broad 

 whitish band. Knees and tarsi yellowish ; fore femora dark tawny ; 

 hind femora minutely serrated. Wings vitreous. Fore wings with a 

 blackish mark near the tip of the interior border ; veins whitish. 

 Length of the body 2^ lines ; of the wings 6 lines. 



Para. 



Genus Pterygia, Laporte. 



Pterygia subminax. 3Ias. Nigricanti-fusca ; thoracis tectum altmn, 

 punctatum, comibus duobus anticis lateralibus, postice in spinatn sub- 

 arcuatam productum ; pedes fulvescentes, fusco notati, femoribus tibiis- 

 que subdilatatis ; alfe anticse lurido-hyalinse, basi fusco pimctatse, 

 fascia subapicali fusca. 



3Iale. Blackish brown. Protuberance of the thorax forming a lofty 

 punctiu-ed ridge whose fore part is somewhat higher than long, and 

 which is armed in front wath two short diverging horns, and extends 

 hindward in a deep slightly curved spine to beyond half the length of 

 the abdomen. Legs dull tawny, marked with brown ; femora and tibiae 

 slightly dilated. Fore wings lurid hyaline, extending much beyond 

 the abdomen, brown and punctured at the base, with a bro-«Ti sub- 

 apical band. Length of the body 3 lines ; of the wings 8 lines. 



Genus Oxyrhachis, Germar. 



OxYRHACHis SPiNicoRNis. Focm. Picca ; thorax carinatus, comibus 

 duobus crassis ascendentibus subarcuatis apices versus reticulatis 

 spinas duas emittentibus, spina postica elongata; pectoris latera 

 albida ; alee ciuereo-hyalinse, venis piceis. 



