-AMYCUS. 193 
than the tarsus. No white spot in the centre of the clypeus. 
Tarsus and bulb smaller, more elongate. 
a. Tibia of palpus slightly longer than the tarsus. Tibial spur 
parallel-sided, truncato-emarginate at the apex. Mandible 
with six or seven small teeth om the lower margin. 
aa. Palpal spine stout, sinuous, its apex slightly enlarged and 
recurving forwards . . . .- . . + +. «+ » « » « palpinalis, sp. un. 
bb. Palpal spine stout, sinuous, its apex aculeate . . . . . . longipalpus, Peckh, 
6. Tibia of palpus not longer than, but as long as, the tarsus. . 
Tibial spur broad at the base and rounded, attenuate towards 
the apex and terminating in a blunt poimt. Mandible with 
four or five teeth on the lower margin. Palpal spine stout, 
uniformly curved, not sinuous, not enlarged or recurved at its 
APEX. 2 we ee ee ee ee quadriguttatus, sp. n. 
ii. Tarsus of palpus longer than the patella. Patella shorter than the 
tarsus; tibia one-half shorter than the tarsus. Tarsus and bulb 
larger and broader. A triangular white spot at the centre of 
the clypeus beneath the anterior central eyes. Palpal spine 
broad, geniculate on its upper outer side, and concavo-tubuliform 
throughout its length. Tibial spur very similar to that of 
A, quadriguttatus . . . « . hieroglyphicus, Peckh.; pacatus, Peckh. ; fallax, Peckh. 
Norz.—The cephalic area is so liable to become rubbed that one must be very cautious in placing 
confidence on characters taken from the superciliary hairs and scales. 
Females. 
A. Size much larger; abdomen with four dusky spots or a more or 
less continuous broken band. Vulva consisting of a broad dark 
red-brown chitinous piece with a large transverse oval concavity 
near its anterior margin. Mandible with6—5 teeth . . . . . benignus. 
B. Size much smaller; abdomen with a pair of dusky shoulder-spots, 
followed by two pairs of black spots, sometimes connected, and 
two dusky spots just above the spinners. Vulva consisting of two 
large pale oval areas near the anterior margin, connected posteriorly 
by a transverse recurved chitinous rim about midway between the 
anterior and posterior margins. Mandible with 2—5 teeth . . . quadriguttatus. 
1. Amycus benignus. (Tab. XIV. figg. 5, 5a-h, ¢; 6, 6a, 2.) 
Triptolemus beniynus, Peckh. Proc. Nat. Hist. Soc. Wisc. 1885, p. 64, t. 2. figg. 2, 2a, 6 
Dec.) *. 
eo eotones, Peckh. Oceas. Papers Nat. Hist. Soe. Wise. iii. 1, p. 18, t. 1. figg. 2, 20, d, e (¢), 
2a, c (¢) (April 1896) *. 
Amycus marjorii, Peckh. loc. cit. p. 25, t. 1. figg. 6, 6a-c (go), 6d (2) ”. 
Type ¢, gynetype Q, of both A. beniguus and A. marjori, in coll. Peckham. Total length, ¢ 5-2, 2 6 millim. 
BIOL. CENTR.-AMER., Arachn. Aran., Vol. II., January 1901. 2 of 
