JOURNAL 



OF THE 



ROYAL MICROSCOPICAL SOCIETY. 



APKIL, 1880. 



TRANSACTIONS OF THE SOCIETY. 



VII. — A Further Conirihiition to the KnoivUflge of British 

 Orihatidx. (Part II.) By A. D. Michael, F.L.S., F.RM.S. 

 (with the assistance of 0. F. Geokge, M.R.G.S.E.). 



{Read 14^/i January, 1880.) 

 Plates V. and VI. 



The general rules at the head of Part II. of my former paper 

 have been strictly followed, except those which relate to the 

 drawings. 



I have numbered the species consecutively with those in the 

 former paper in order to facilitate reference. 



All the figures are drawn from nature. 



EXPLANATION OF PLATES V. AND VL 

 Plate V. 



Fig. 1. — Freincus Monr/ns. Adult nymph, x about 100. n, ca.st notocjiistral skiu 

 of larva; b, cast notogastral skin of nymph, first ecdysis ; c, cast notofrustral skiu 

 of nympli, second ecdysis; d, cast notogastral skin of nympii, tliinl ecdysis; 

 e, ati-^matic hair. 



Fig. 2. — Ilinnannia histriatus. Adult amphibious nymph {Nothrus palliatiis of 

 Koch), X aljout .'iO. 



Fic. 3. — A'lldsjiis bi/nlix. Adult nymph, x about 70 {Mnrcvi ncumimtta of 

 Kocli), drawn in tlic inert stage. The dark marking in the middle of the 

 abdomen ari.ses from tlie liver, excretf)ry organs, cS;c., showing tiirough the skin. 



Fig. 4. — Nothrus so/nis (Heiui.). Perfect creature, x about 8;"). n, outer 

 apophysis of tlie rostrum ; '», inner ditto ; c, akin of posterior jirojc ctiun of nymph 

 carried by perfect creature; </, atrip of same akin along lateral margin of perfect 

 creature. 



Fit;. 5. — The .-iame. Half of posterior margin as scon by transmitted light, 

 same ampliiication. ", body of adult seen tlirougli nymplial skin ; li, apu|(hysis 

 at latero-piiHterial angle ; c, small lirancli fruiu inner side of ditto, carrying. 

 (/, a large spatulate hair; c, cast skin of |)o.steiiur margin of nymph; f\ skin of 

 the great jirolonged augh; of tlie bfnly of the nymph ; </, apophysis of saine ; 

 /«, Bpatulatf liftir carried thereby; ', .'^inie as i/. Fig. 4. 



Fui. 0. — Th(> same. Mundihle, x about UOO. 



Fio. 7. — The same. (Hiicr mouth organs x a))out :>"0. ,i, labium; 

 I; maxilla ; <•. palpus. [I'i.ati: VL 



VOL. III. N 



