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Show 940 REY. O. PICKARD CAMBRIDGE ON A NEW ACARLDEAN. [Dec. 14, close together from the lower margin of the caput, and two others, equally near together, issue on either side from near the posterior end of the abdomen. Terminal tarsal claws 2, on a small claw-joint and unarmed. Beneath the tarsi of the first pair of legs is a scopula. The fourth pair are much the longest and slenderest, and their genua and metatarsi are furnished with a large, tolerably compact brush of long, black, prominent hairs of an elongate sharp-pointed knife- or dagger-shape. Palpi short; basal and humeral joints very strong; the radial joint tapers, and terminates with a nail-like claw or spine ; the digital joint, which issues from near the base beneath the radial, is of a clavate or racket-bat shape, and is as long or longer than that joint. The mouth-parts are not easily traceable, closed up together as they are by the basal joints of the palpi ; but they consist of maxillae, labium, and falces, above which is the rostrum or beak, drawn out to an obtuse point, whence there issues a long, strongish, sharp-pointed spiny process. EATONIA SCOPULIFERA, sp. n. (Blate LV.) Adult female. Length lg lines. Colour scarlet; body slightly broader in front than behind, where it is well rounded ; it is thickly clothed with short, pale, strongly clavate hairs. Caput longitudinally bisected by a distinct furrow from the nose-like anterior extremity to tbe thorax, where it ends in a roundish pit or fovea, in which is a small, somewhat tuberculiform, round boss. The nose-like projection is furnished with numerous obtuse and slightly clavate, spine-like, prominent hairs, some longer, some shorter. The legs of the first three pairs are of nearly uniform length, and are furnished wdth (besides hairs) distinct spines at the fore extremity of the metatarsi; the fourth pair are much the longest and slenderest, and the genua and metatarsi are thickly furnished with long, strong, lanceolate, black hairs, forming a large brush, much like those used in the cleaning of bottles. The egesave small and of a reddish hue, in two groups ; those of each group well separated from each other on tubercles whose bases are united. The genital aperture consists of a longitudinal cleft on the summit of a strong oval prominence uuderneath the anterior extremity of the abdomen, between the basal joints of the first pair of legs. Hub. Biskra, Algeria. A closelv-allied, but I think quite distinct, species has been described and figured by A. Birula from Bussian Armenia (Hor. Soc. Ent. Boss, xxvii. p. 388, pl. vii., 1893), under the genus Rhgncholophus. The structure, however, of these two curious Acarids appears to require a new genus for their reception, and |