STROTARCHUS. 87 
Upper margin of the fang-groove with three subequal teeth, lower margin with two, but the number is 
not constant. Colulus absent. 
The two species of which the males are known may be separated thus :— 
Males. 
A. Tarsus of palpus at least two aud a half times longer than the tibia. 
Apex of bulb terminating in a short fork-like tongue, with two 
prongs; also with a long almost straight fine spine coming from 
behind the palpal organs at their apex and directed straight forwards, 
lying in the concavity of the tarsus. Tibial spurs shorter and blunter. predator, O. P.-Cambr. 
B. Tarsus of palpus scarcely twice the length of the tibia. Apex of bulb 
terminating in a sharply curved hook, its base springing from a 
bicuspidate chitinous plate. Tibial spur longer and sharper . . . violaceus, sp. 0. 
1. Strotarchus nebulosus, (Tab. VI. fige. 14, 14a-c, 2.) 
Strotarchus nebulosus, E. Simon, Ann. Soc. Ent. Fr. 1888, p. 210 (¢?)’. 
Type, 2, in coll. E. Simon. Total length 13 millim. 
Hab. Mexico, Presidio !. 
Our figures are taken from M. Simon’s type. 
2. Strotarchus violaceus, sp.n. (Tab. VI. figg. 15, 15a, ¢; 16,2.) 
Type ¢, and cotype 2, in coll. Godman & Salvin. Total length, ¢, 9 millim. 
3 Q. Carapace and sternum pale mahogany-brown, mouth-parts and mandibles darker, all with violet 
reflections. Legs pale orange-brown, with violet reflections. Abdomen ochreous-brown. 
3 Q. Posterior row of eyes procurved, eyes subequal, two diameters apart; anterior row straight, centrals 
circular, larger than the laterals, three-fourths of a diameter apart, one-fourth of a diameter from the 
laterals. Clypeus just over one and a fourth diameters of an anterior central eye. Lower margin of 
fang-groove with two teeth, upper margin with three. ‘Tibiz i. and ii. with 2—2 spines beneath and a 
pair of lateral spines on each side. Protarsii. and ii. with two spines beneath and a pair of lateral 
spines on each side. Patella without spines. Tibi and protarsi iii. and iv. numerously spined, the 
former without dorsal spines. 
6 palpus: tibia just over twice as long as broad, with a short sharp straight spur on the external apex. 
Tarsus scarcely twice as long as the tibia, deeply concave beneath, almost to the apex, containing the 
palpal organs: these consist of a globular bulb terminating in a sickle-shaped black spine; below its 
base lies a bicuspidate chitinous plate. 
@ vulva consisting of a large shallow semicircular cavity, its margins somewhat reflexed, rather narrower in 
front, emarginate behind, having in the anterior central portion of the cavity a black transverse spot. 
Hab. Mexico, Omilteme in Guerrero (H. H. Smith). 
3. Strotarchus predator. (Tab. VI. figg. 17, 17 4, 3.) 
Bedriacum predator, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 251, t. 33. figg. 7, 
Zaf(ds)’. 
Type, ¢, in coll. Godman & Salvin. Total length 10°25 millim. 
Hab. Muxico, Orizaba (H. H. Smith *). 
