1865.J 273 



A single hrachjpterom ? , from the ueiglibourhood of Leicester, 

 is before me, which I refer, with some slight hesitation, to this species. 

 Its large size, as well as the abolition of the medial carina on the 

 vertex, are charactei's which I am obliged, at least for the present, and 

 in the absence of more specimens, to regard as conclusive. The rest of 

 the diagnosis is compiled from the above authorities. 



h. Frontis carina media in vertice conspicua. 



i. Trons duplo longior quam sub ipsis oculis latior. 



* Liber rostri apes clypeo aequalis lougitudine. Hem- 

 elytrorum nervi conspicue impresso-punctati. 



14. — Delpliax pellucidus, Fab. 

 I. — Forma macroptera, ^ $ . Niger ; carinse tam frontis quam 

 prouoti, scutelli et pronoti margines, testacei. Hemelytra abdomine 

 longiora, hyalina, nervis dense et conspicue impresso-punctatis ; costa 

 circa membranam nigricans. Pedes fusci, vel obscure testacei. 



II. — Forma hrachyptera, ^. Plerumque niger, carinis tautum 

 frontalibus testaceis. Sed variat ultra modum, una alterave corporis 

 parte testacea. Segmentum genitale medio in angulum fere excisum. 

 Eostri articulus Imus 2do sequalis longitudine. Hemelytra duplo 

 longiora quam latiora, abdominis tres partes obtegentia, dense impresso- 

 punctata. Alae nullre. ? Ssepius testacea, rare nigricans ut mas. 



Long. 1-U 6; li-lHin. ?. 



Fab., Rhyng., p. 84. Germ., Mag., 3, p. 212. Flor, E. L., 2, 



p. 65. D. suturalis, Curt., B. E., Qo7.—Jlavescens striata 



marginata, Fab. — dispar. Fall., Zett. — hemiptera, Germ. — 



obscurella, Stal, &c., &c. ) 



Other works must be consulted for the synonymy and immerous 



varieties of this common species. However its individuals may differ 



in colour, size, or development of hemelytra, they may be separated 



from all others by the dense and deeply impressed punctures of the 



veins : — from D. neglectus, by wanting the deeper brown tinge at the 



sides of the pronotum and scutellum, and by their shorter antennae, 



the apex of the 2d joint of which does not reach the clypeus ; — from D, 



striatellus, by the absence of the black streak in the angle of the 



clavus ; — and lastly, from D. discolor, by the difterent form of the frons 



(see synopsis). Zetterstedt (Ins. Lapp., p. 305. Delphax dispar) was 



the first to observe that the various forms of this insect cohabit, and 



that the apterous and winged individuals are to be found in cditu, thus 



establishing their identity upon the surest basis. They are found 



abundantly in grassy places throughout northern and central Europe, 



less commonlv in the Houth. 



