Vol 2 Part 2a. Hemiptera - Cicadomorpha - Royal Entomological ...

40 II (2). HEMIPTERA: OIOADOMORPHAbrown median dots. Veins of fore wing chestnut brown to dirty greenishyellow ; rarely completely hyaline in all cells, but some hyaline areas oftenpresent ; except in uniformly brown fore wing, raised margin at anal anglewhitish, sometimes tinged yellowish. Black line not present on outer edge ofposterior tibiae) ...................................................... 5- Gonoplac shorter, in side view not projecting beyond apical abdominal segment bymore than 0·28 mm., and with lower margin more rounded (fig. 191). (Overalllength 4·8-5·5 mm. Very variable in colour; the following four basic forms arerecognisable, but intermediates also occur.(i) Upper part of face, fore body and patch around anal angle of fore wingclear yellow-green; lower part of face chestnut brown, often in form ofheart-shaped patch. Rest of fore wing chestnut brown, uniformly or withsome hyaline patches. No black lines on tibiae.(ii) Face yellowish with black discoidal spots, subocellar spots and thyridia;dirty greenish patch present between thyridia. Pronotum dirty greenishwith dark dots in striations. Scutellum yellow-brown or brown with twodark median dots and two brown basal triangles. Fore wing yellowisharound anal angle, otherwise hyaline with dark brown veins. Black linespresent outwardly on posterior tibiae.(iii) Face yellowish with more or less dark brownish discoidal spots, narrowlyblackish towards upper margin ; thyridia black. Fore body and basalhalf of fore wing entirely yellow-green ; fore wing apically hyaline withyellow-green veins. No black lines on tibiae.(iv) Uniformly chestnut brown, sometimes with darker discoidal spots on face.No black lines on tibiae) ...... . . ................ flavicollis (Linnaeus)5 On hazel (Gorylus). (Face brown or dirty yellowish, thyridia brown or black;postocellar spots present or absent ; discoidal spots absent or brownish, sometimeswith a blackish streak along upper margin, never completely black ;discoidal cross-band and median line absent. Pronotum yellowish or brownish,sometimes broadly darker medially. Overall length 5·1-5·6 mm.)carpini (Sahlberg) form avellanae Edwards- On hornbeam (Garpinus). (Face yellowish; thyridia black; postocellar spotdark ; black or brown discoidal spot somet imes present. Discoidal cross-bandand median line absent. Pronotum yellowish or brownish, sometimes greenishgrey posteriorly. Overall length 4·9-5·5 mm.) . ...... . carpini (Sahlberg)Genus Pediopsis BurmeisterThis genus as recognised by Edwards (1896) and other earlier writerscontained a number of species, but a,ll the European forms except one havenow been transferred to Macropsis or other genera. The one Europeanspecies now recognised occurs in Britain.Face, vertex and pronotum greenish-yellow. Scutellum brown, sometimes withgreenish-yellow suffusion towards apex, sometimes with two darker brown trianglesbasally. · Fore wings of male with irregular pattern of black-brown dots, usuallytending to be denser towards apex (fig. 2); in female, fore wings mainly lightbrown with a tendency to form two hyaline areas medially, pattern not usuallyformed of distinct dots. In female, gonoplac projecting beyond apical abdominalsegment by about half its own width. Overall length : c'r, 5·0-5·3 mm. ; ~.5·2-5·8 mm .... . ................ . .................... .. .. . tiliae (Germar)On Tilia (lime). Englarul : Glos., Bucks., Kent, Surrey, Berks., Hants., Dorset.vb--ix. Europe. Algeria.Genus Hephathus RibautThis genus, separated from Macropsis by Ribaut (1952), contains twoEuropean species, one of which occurs in Britain.Face with oblique striations in upper part, black or black-brown with variableyellowish brown areas, particularly an oval patch towards lower margin offrontoclypeu~and often. a roughly square area between ocelli and upper margin of face.Vertex yellowish-brown posteriorly, anteriorly more or less extensively black-