226 [March, 



AN ESSAY TOWARDS A KNOWLEDGE OF BRITISH HOMOPTERA. 



BY THE BET. T. A. MARSHALL, M.A. 



{Continued from -page 201). 



2. CarinsB faciales plus minus eonspicuse. 



^ Pronoti carinse laterales rectae, marginem posteriorem 

 attingentes. 



(>nc4 y ■ ■ " ^ " ' 5. — DelpJiax notula, Germ. 



I. — Forma macroptera. Color variat. Caput testaceum, geuis 

 utrinque nigro bimaculatis. Pronotum pallidum, disco ssepe obscurius, 

 puiicto utrinque ad angulos anteriores uigi'o. Scutellum nigro-fuscum, 

 sub-rufescens, apicem versus late depresso-foreatum. Metathorax albo 

 nigroque varius. Abdomen nigricans, infra et ad latera plus minus 

 fusco-testaceum. Hemelytra abdomine multo longiora, apice quam 

 basi nonnihil latiora, byalina, decolorata, nervis inconspicuis, macula nigra 

 oblonga in ipso angulo posteriore clavi sita. ^ ^ D. lineola, Stal. 6fv. 

 1854, p. 190. 



II. — Forma IracTiyptera. Hemelytra abdominis S'"^"- partem non 

 excedentia, longitrorsum fusco vittata ; nonuunquam tota fusca, vel etiam 

 nigricantia. Alse nullge. ^ '^ D. truncatipennis, Stal. I.e. See Plor. 

 R. L., 2, p. 45. 



The black dash on the inner margin of the transparent hemelytra, 

 immediately distinguishes this species, in its winged form. With the 

 brachypterous variety I am unacquainted. I took one ^J and two ? 

 at the same time and place as DelpJiax pallidulus, No. 3. 



^^ Pronoti carinse laterales incurvae, ante marginem poste- 

 riorem abruptae. 



a. Hemelytronim nervi albi, maculis nigris rotundis notati. 



/< 6. — Delphax limhatm^ Faib. 



I. — Forma macroptera. Testaceus ; abdomine, et saepe scutello, 

 fuscis. Hemelytra abdomine longiora, apice dilatata, albo-hyalina, 

 nervis melanostictis, fascia incurva post medium, marginem interiorem 

 vitante, et nervorum apicibus, fuscis ; macula etiam disci, et altera ad 

 marginem interiorem apicali, indeterminate et pallide fuscescentibus. 

 Pedes vel testacei, vel fusco-varii, vel etiam toti fusci. ^ $ . 



II. — Forma hrachyptera. Hemelyti*a abdomine multo breviora, 

 alba, basi et apice plus minus infuscata ; nervi, &c., ut in jiraecedente. 

 Alae nullae ^ ? . Long. 1^-1^ ; alar. exp. 3i lin. 



