S. Mahunka szerk.: Folia Entomologica Hungarica 61. (Budapest, 2000)

36 (37) Setae of sawsheath curved inward (Fig. 70). Head and mesonotum densely and roughly punctured. Head behind the eyes parallel. Wings hyaline. 8.0-9.0 mm. - Rare. Northern Europe, Ural schneideri Kiaer 37 (36) Setae of the sawsheath straigth (Fig. 83), 4th-6th serrulae in Fig. 28. Red colour variation. (See also D. nigratus (O. F. Müller) in Table C.) nigratus (O. F. Müller) 38 (33) Sawsheath strongly dilated (Figs 58, 71) 39 (40) Pronotum, tegulae, fore lobes of mesonotum red. Shining black. Head densely but not roughly punctured with shining interspaces near the postocellar fur­rows. Vertex between the postocellar furrows sporadically and deeply punc­tured. Clypeus slightly emarginated. Fore lobes of mesonotum sporadically and deeply, lateral lobes more densely and shallowly punctured. Scutellum shining and wrinkled. Mesopleuron densely and coarsely punctured. Abdominal seg­ments from the 2nd on with transverse surface sculpture. Wings hyaline. Sawsheath in Fig. 71. - Insect pest on Triticum in China tritici Chu 40 (39) Mesopleuron partly red 41 (42) Pronotum, tegulae, upper third of mesopleuron red. Fore lobes of mesonotum with red on their margins, a triangular black spot starting from the upper edge and reaching the middle of the fore lobes. Head black and densely punctured with smaller shining interspaces on the temples. Clypeus slightly emarginated. Cenchri large, brownish white. Pronotum densely and shallowly punctured. Anterior margin of the fore lobes smooth and shining. Fore lobes even more sporadically punctured than pronotum, lateral lobes and scutellum densely punctured, matt. Pubescence white, moderately dense and about as long as the diameter of an ocellus. Wings hyaline. Abdomen with fine surface sculpture including the first segment. 8,5-10.0 mm. Sawsheath in Fig. 58, 4th-6th serru­lae in Fig. 13. - Known only from Shanghai, China shanghaiensis Haris 42 (41) Pronotum, tegulae, mesopleuron coloured as D. shanghaiensis Haris, however, prescutum red with only a middle black spot. Wings hyaline. Abdominal ter­gites strongly coriaceous. Setae of sawsheath brown. Mesopleuron with large and sparse punctures. Sawsheath similar to the one of Dolerus tritici Chu, how­ever, sides are straight not concave. 7.5-8.0 mm. - Frequent. China sinensis Wei Table C 1 (40) Sawsheath in dorsal aspect narrowing to the tip so as to appear more or less pointed, though as a rule bluntly (Figs. 72-81, 85, 61) 2 (37) Fore lobes of mesonotum strongly convex, and usually with a median depres­sion or channel normally developed 3 (30) The longer hairs near the apex of the sawsheath directed strongly backwards and curved so that the apices of the long hairs on one side approach those on the other side and the tips are closer together than the greatest breadth of the sawsheath when viewed dorsally (Figs 72-78)

Next

/
Thumbnails
Contents