284: Mr. R. I. Pocock on some yellow, with a fulvous tinge. The areolet narrowed at the top ; the cubital nervures almost united ; the recurrent nervure is received in the middle ; the transverse median nervure is received before the transverse basal. Petiole stout, shining, its base and the sides of the dilated part with scattered punctures ; the dilated part with a..i elongated fovea at the base ; the space behind the fovea and the space surrounding the spiracles finely striated ; the second, third, and fourth segments closely punctured, the second strongly longitudinally striated between the gastrocoeli, which are large, deep, smooth, and with an oblique slope at the base and apex. The yellow line on the petiole is narrowed in the centre, on the second only very slightly, on the third and fourth acutely narrowed ; on the apical two not perceptibly narrowed; the second and third segments broadly in the middle^ the fourth and fifth broadly at the apex, and the apical segments are entirely yellow. [To be continued.] XXXVII. — Descriptions of some new African Arachnida. By R. I. Pocock. Order SCORPIONES. Parahuthus cristatus, sp. n. Parahuthus brevimamis, Pocock, P. Z. S. 1890, p. 125 (nee Butkus brevimanus, Thorell). ? . — Allied to P. h-evimanus, Thorell, in the complete absence of distinct crests on the sides and under surface of the fourth caudal segment. Caudal segments 1-3 with eight keels, the median lateral weak on segments 2-3 and only granular posteriorly ; four inferior keels on segment 1 entirely smooth, on 2 and 3 marked with very coarse tubercular granules, which increase in strength posteriorly, the lateral keels converging posteriorly ; on the 3rd segment the ter-minal tubercles of the four keels form a broad, quadrilobate, U-shaped crest ; the anterior edge of the lower side of the 4th segment also raised into a distinct lobate crest. Upper-side of segments 1-2 abruptly elevated anteriorly, the anterior third rising nearly vertically, the posterior two thirds hori-zontal, excavated and shagreened. Chelce as in P. hrevimanus apparently, except that there are
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