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Show 1891.] ASSOCIATION OF GAMASIDS WITH ANTS. 647 organ is often drawn as the lingua and occasionally, I fear, as epistome, whence great confusion arises ; it would bear almost the same relative position to the epistome as in the two figures if seen from below, but the epistome would not advance so far beyond it. Ventral surface rough, deeply excavated for the reception of the legs, and with numerous strong ridges. There is a singular round chitinous projection, surrounded with a strong rough edge, in the median line between the coxae of the 4th pair of legs in both sexes, with a deep pit on each side of it. Genital plate of female straight behind, rounded anteriorly, extending from a little in front of the 4th coxae nearly to those of the first pair. That of the male of the ordinary form and position. All the legs furnished with claws and caruncles. Hab. Very numerous in one nest of the wood-boring Ant Camponotus herculeanus (probably race ligniperdus) near Innsbruck, Tyrol, and a few in other nests of the same Ant in the same place. Mr. E. Bostock has since found it fairly abundant in the nests of Formica fusca at Buxton, Derbyshire. LCELAPS CUNEIFER, n. sp.1 (Plate XLIX. figs. 2-2/.) 2 6 millim. millim. Length, about '77 '64 Greatest breadth, about .. -60 '47 Colour dull yellow-brown or bay, the specimens vary in depth of tint from light to quite dark. Texture fully chitinized, smooth but not polished; the whole body covered with irregular reticulations averaging about 25 to 50 to the millimetre, caused by fine raised chitinous ridges. No other markings. Shape pyriform, very slightly truncated in front, rounded posteriorly. The whole body much arched on the dorsal surface. Mandibles of male (fig. 2 b) with the fixed arm of the chela having a bifid or bidentate end, but not otherwise dentate. Movable arm strongly recurved at the distal end, and with a long, chitinous, curved, accessory piece projecting beyond the principal part of the chela. Epistome (fig. 2 c) hyaline, almost rounded, but with a slight tendency to a median point, the whole anterior edge set with sharp points, of which one on each side is somewhat longer than the others. The whole dorsal surface set with short, cuneiform, slightly curved hairs (fig. 2/) at almost equal distances, about 10 to 15 to the millimetre; these also surround the periphery. Ventral surface of the female (fig. 2 a) with anal plate small and spade-shaped; genital plate large, with a semitransparent, rounded, anterior edge overlapping the sternal plate. Peritreme conspicuous, almost straight. The plates on the ventral surface are composed of 1 According to Professor Berlese's latest classification, although not according to his former ones, this species and the others of the same genus in this paper would probably be considered as belonging to the genus " Sejus." I have not thought it wise to adopt this view. |
