WITH DESCRIPTIONS OF NEW SPECIES. 371 
are a immber of veiy short spines. Sternum rather large (length 187 jjl, 
breadth 1G5 yu.). Jagularia absent. Metasternal plates extremely small. 
Genital plate longer than broad, with a thick hinder margin. Metapodial 
plate much produced, and ending in a bluntly-pointed extremity reaching 
beyond the front margin of the ventro-anal plate. The latter is large and 
much broader than long (length 120 /i., breadth 154 (U,), front margin trun- 
cated, posterior margin evenly rounded. Inguinal plates inconspicuous. 
Length 429 fi, breadth 252 fi. 
Locality. Two specimens found amongst wet moss collected on Lambay 
Island, Co. Dublin, in July. 
Lasioseius (Episeius) sphagni, sp. nov. (PL 20. fig. 10.) 
This species bears a superficial resemblance, especially in the form of the 
ventral plates, to L. ladaptoides, Berl., but, apart from other differences, it 
may be easily known by the elongate tarsi and modified ambulacra, which are 
of the Episeius type, with long terminal bristles, while in L. Icelaptoides 
these parts are of the ordinary L. muricatus type. 
Female. Colour light brown, shape broadly ovate. Dorsal plate very 
large, surface not reticulate, but with indistinct areolations on its anterior 
part. Hair armature weak, a row on side margins stronger, and there are 
three pairs of deflexed hairs on the end margins. Jugular plates absent. 
Sternum normal (length 110 /a). Metasternalia distinct. Genital plate 
broad, front margin indistinctly serrulate ; lying behind this plate are four 
small linear plates. Ventro-anal plate large, broader than long (length 
about 200 /t, breadth 264 ^u,), front margin flattened. Sides produced in a 
rounded prominence in front, emarginate towards apex, which is somewhat 
truncated and minutely punctured. Canal of peritreme broad, with the 
usual post-stigmatic continuation, and protected by a narrow outer plate. 
Metapodia strongly chitinized, ending in bluntly-pointed extremities, much as 
in L. italicus, Berl. Epistome tricuspid. Maxillary plate quadrate; corniculi 
small and slightly sinuate, and three pairs of long hairs stand near their bases. 
Palps normal. Legs long and robust ; length of first and fourth pairs about 
equal (562 /x) ; ambulacra with three terminal bristles and a pair of small 
membranous lobes. 
Locality. Two specimens found in sphagnum collected in the Black Valley, 
Howth, Co. Dublin, in October. 
Lasioseius (Episeius) italicds, Berl., L. (E.) michaeli, sp. nov., 
L. (E.) TENUIPKS, Ralht., and L. (E.) majoe, sp. nov. 
From a study of the species belonging to the "italicus'' group of the sub- 
genus Episeius, Hull, which includes those species of Lasioseius in which the 
tarsi are elongate and the ambulacra armed with bristles instead of the usual 
