. Bulletin of the British Museum (Natural History) Zoology. THE BRITISH DERM AN YSSID AE (ACARI) 361 Dermanyssus quintus Vitzthum Dermanyssus quintus Vitzthum, 1921, Arch. Naturgesch. (A) 86 : 7. Evans & Till, 1962, Ann. Mag. nat. Hist. (13) 5 : 286. Female : Chelicera with segment II greatly elongated, digits minute, weakly dentate. Four pairs of gnathosomal setae with about 42 ju apart, about 36 /x apart ; relatively stout. Deutosternum with ten denticles arranged in a single longitudinal file. Corniculi membranous with sclerotized bars. Tectum capituli elongate, triangu
. Bulletin of the British Museum (Natural History) Zoology. THE BRITISH DERM AN YSSID AE (ACARI) 361 Dermanyssus quintus Vitzthum Dermanyssus quintus Vitzthum, 1921, Arch. Naturgesch. (A) 86 : 7. Evans & Till, 1962, Ann. Mag. nat. Hist. (13) 5 : 286. Female : Chelicera with segment II greatly elongated, digits minute, weakly dentate. Four pairs of gnathosomal setae with about 42 ju apart, about 36 /x apart ; relatively stout. Deutosternum with ten denticles arranged in a single longitudinal file. Corniculi membranous with sclerotized bars. Tectum capituli elongate, triangular, with smooth margin. Pedipalp (2-4-6-12) with two- tined apotele. Dorsal shield (672 ix X 336 xx) with 11 pairs of setae distributed as in Text-fig. ioia ; setae /5 off the shield, J2 absent. Setae J2, z2 and 2:4 considerably longer than the remaining setae on the shield. Surface of shield weakly reticulate, with sculpturing anteriorly. Tritosternum biramous, with hyaline denticulate margin. Sternal shield (approxi- mately 40 /A X 140 /x) with a more strongly sclerotized central portion ; bearing two pairs of setae and one pair of pores ; st^ and metasternals free on unsclerotized integument. Between sti, 72 /x ; between sti and st^, 90 /x. Genital shield (174 /x x 60 /x) with weakly defined linear markings and bearing genital setae only. Anal shield (112 /x X 138 /x ; maximum width 174 /x) with paranal setae about 27 /x long. Opisthogastric cuticle bears a prominent arc of stout setae (Text-fig. ioib). Peri-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Farn, Alexander E. London : Butterworths
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