British Oribatidae V02, Michael

BEITISH OPJBATID^ BT ALBERT D MJ H A E L, F.L.S., F.Z.S., F.R.M.S., &c VOL II LONDON: PRINTED FOR THE RAY SOCIETY MDCCCLXXXVIII MCZ LIBRARY HARVARD UNIVERSITY CAMBRIDGE MA- USA PRINTED BY ADLAKD AND SON, BARTHOLOMEW CLOSE THE RAT SOCIETY INSTITUTED MDCCCXLIY 77i,is volume is issued to the Suhserihers to the the Year 1887 LONDON MDCCOLXXXVIII Rat Society /or ; PREFACE TO YOL In tlie II Preface to Vol I of this book I mentioned the localities in which I myself, or those who had had collected Orihatidce Since that time have searched the following additional localities, viz the New Forest in Hampshire, Ambleside in Westmoreland, and Keswick in Cumberland Mr E Bostock has collected at Colwyn in Denbighshire, in the Isle of Anglesea, and at other places in North Wales and Mr M J Michael has collected at Gower in South Wales, at Malvern in Worcestershire, and elsewhere I am also indebted to the last-named gentleman for the opportunity of examining a collection formed by him in the High Alps I have once more to thank all those whose names are mentioned in the Preface to Vol I for their continued assistance, and especially Prof T Rupert Jones for his assisted me, I valuable aid in the laborious work of revising the sheets for the press During the year 1886 the sudden death of Mr Rhein, the plates in Vol I and some of those who engraved all in the present volume, made help in this department ; it necessary to seek other therefore, the greater number of the plates in Vol II have been placed on the stone by Mr Horace Knight, on behalf of Messrs West, PREFACE VI Newman, and Co., and all in the volume have been printed by that firm have little doubt that time will show that this book not a perfect monograph of the British Orihatidw, I is therefore I have inserted a list of all original notices am acquainted of species, or supposed found in this country and I have endeavoured, if possible, to mention some leading characters of the species ; this, I hope, may be with which I species, of Oribatidce not hitherto ; useful to anyone finding a species not at present con- Although subsequent discovadd to our knowledge of the group, I think the book has been prepared carefully, it certainly has been executed to the best of my ability, and sidered to be British eries will doubtless I believe that it contains as much information relative to the family as the present state of science respecting the Acarina permits ALBERT Cadogan Mansions, Sloane Square, London; 1st November, 1887 D MICHAEL CONTENTS OE VOL Index to Species in Vol Description of Genera II IT VIU CONTENTS Further Notes relative to Species described Oribata piriformis IX in Vol I INDEX TO SPECIES IN YOL II ; PLATE LI (Page 556.) (See also PL L.) Adult; somewhat diagrammatic view of the left genital and anal plates and surrounding parts seen from above (within the body) HoPLOPHORA MAGNA Fig (an.) anal plate ; {d p.) (g.p.) genital plate part of the dorsal plate; {I p.) part of the lateral plate anchylosed to the dorsal plate, and representing the acropleuron and basipleuron (v p.) vestigial ventral plate anchylosed to the anal plate ; (e^.) expulsory vesicle a, b, c, 2d, e, 2f, g Eggs in progressive stages of development, and in various positions, dissected out of the oviducts of the g is the highest state female All X 100 of maturity attained within the body of the mother Young hexopod larva lately emerged from the egg X 100 The abdomen has not yet attained its proper shape The egg-shell from which it has escaped X 100 ; HoPLOPHOEA ANOMALA (Page 558.) Length from about '75 to about 1*60 mm Adult extended, and with genital and anal plates open, and genital suckers protruded ; X side-view Adult ; 50 nearly closed up HoPLOPHORA STRIODLA ; side-view (Page 563.) mm Adult; from above X X 50 Length about '52 85 HoPLOPHORA ARDUA (Page 564.) Length about 80 mm from the side Adult X 75 left maxilla and palpus from above Adult; ; X 10 200 Adult; right mandible from the inner X side 11 Adult; (left) 180 pseudo-stigma and pseudo-stigmatic organ X 250 Adult; genital and anal plates X 80 13 Adult; interlocking portion of anal 12 X 14 500 Adult; 1st leg 15 Adult; 4th leg X X 180 180 plates PLATE A LI 'D.Mix:^MAd,aJi,ruxX,deh Hoplopliora West,Nemman, k Co Uih mstgna 1-4, E aTvomala 5-G, H.sLricula 7, II, archia, 8-15 PLATE Immature stages of LIT species the adults whereof have been figured in Vol Fig Pelops phceonotus Cepheus bifidatus — — Nymph I (Page 574.) (Page 577.) Nymph (Page 576.) Larva A D yiicKoytl ad, ncub-.djtX Pelops t Immature stages of phosonot-as and Ceph.eu.s Toifidatus ; ; PLATE Fig LIII Nymph (Page 575.) to at p 579; the adult not distinguishable from Oribata Oribata Edwardsii Nymph referred whereof is CUSPID ATA Dam.eus olavipes Larva (Page 426.) Immature reproductive organs of the fully- grown nymph of Nothrus ovary tlieleprodus X about oviducts [v.) vagina {m m.) bands of muscle ((IP-) genital plates Labial and mouth organs (excluding the mandibles) of Ce'pheus latus seen from above X about 130 {d cl.) maxillse; {d' 6^'.) hinder 150 {ov.) ; {ckI.) ; ; edge of same ; (e e.) palpi (/.) ; labium ; {g.) lingua, in paired halves, as it is seen in preparations; this organ is dotted to distinguish it from other parts it is not really dotted {ep.) the epipharynx ; (is.) thin chitinous partition forming the inner skeleton of the mouth, and supporting the epipharynx, ; ; which is beneath it (/o.) foramen in is (hr.) brush bordering the upper edge of each ; maxilla 10 ; {oe.) ; oesophagus The same seen from the side This figure is diagrammatic Same lettering as Fig (the labium is seen in section cut away) Lingua of same ; the maxillse are Epipharynx of same Lingua and section of labium of Orihata lapU daria X about 200 Diagram of the arrangement of the anal plates and ovary of female Notaspis lucorum {ap.) anal plates ; {ov.) ovary ; {od.) oviducts {st.) chitinous piece within the body above the anal plates ; {sd.) sperm-duct (supposed) {vp.) ventral plate 11 Brain (supra-oesophageal ganglion) and smaller lateral ganglia of Orihata glohula PLJ^TE lilll -A.D.MichMjil,, owinxxt- del West^i/ewmarv i-C? cTuram.liLh lomiBLture Stages and Ana.tnmy PLATE ScDTOVERTEX CORBDGATUS (Page 567.) •68 Fig X LIV Length about mm Adult Adult; end of maxilla X 180 Adult; mandible X 1^5 Adult; chela of mandible X 180 Adult (s) pseudo-stigma ; (o) pseudo-stigraa- ; tic organ Adult X 75 Adult X X 180 1st left leg 145 ; ; from the inner (right) side 4th right leg from the inner (left) side 145 ScuTOVERTEX BiLiNEATus •62 X (Page 571.) Length about mm Adult Adult; underside X 80; showing the young fully formed and not enveloped in any eggshell or membrane, although still within the body of the mother This is drawn from an actual specimen, in order to illustrate the viviparous reproduction for which the genus is remarkable 10 75 Nymph Adult; mandible X 145 Adult; palpus X 380 1st left leg from the inner 13 Adult 11 12 ; X (right) side 145 14 Adult; 1st right leg from above X 145 15 Adult; 3rd right leg from the inner (left) side 145 16 Adult; 4th left leg from the inner (left) side X 145 X PLATE A.D.Micha^, ad tuu LIV Scu-tovertex ocarrbLqaLuB, 1-7 bilinea-tu.e 8-iG „ Wesb, f^ewmart &C° chj-am.lUh/ ... Colwyn in Denbighshire, in the Isle of Anglesea, and at other places in North Wales and Mr M J Michael has collected at Gower in South Wales, at Malvern in Worcestershire, and elsewhere I am... by that firm have little doubt that time will show that this book not a perfect monograph of the British Orihatidw, I is therefore I have inserted a list of all original notices am acquainted of... prepared carefully, it certainly has been executed to the best of my ability, and sidered to be British eries will doubtless I believe that it contains as much information relative to the family