100 ARANEIDEA. 
ARACHOSIA. 
Arachosia, O. P.-Cambridge, P. Z. S. 1882, p. 425. 
Type A. anyphenoides, O. P.-Cambr. Amazons. 
The posterior legs in this genus are longer than the anterior ; the posterior row of eyes is strongly procurved : 
the lower margin of the fang-groove has only two teeth; and the spiracular rima is situated at or Just 
behind the middle of the ventral area. 
1. Arachosia puta. 
Arachosia puta, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 100, t. 13. figg. 10, 10 a—c (2) '. 
Type, 2, in coll. Godman & Salvin. Total length 11-25 millim. 
Hab. Panama, Volcan de Chiriqui (Champion '). 
TEUDIS. 
Teudis, O. P.-Cambridge, Biol. Centr.-Amer., Arachn. Aran. i. p. 198 (Oct. 1896). 
Isigonia, E. Simon, Ann. Soc. Ent. Fr. 1897, p. 507. 
Delozeugma, O. P.-Cambridge, Biol. Centr.-Amer., Arachn. Aran. i. p. 182 (ad partem). 
Memnon, O. P.-Cambridge, loc. cit. p. 283 (Dec. 1898). 
Type of Teudis, 7. gentilis, O. P.-Cambr., Guatemala; of Isigonia, I. limbata, EK. Sim., Para; of Memnon, 
M. peragrans, O. P.-Cambr., Guatemala. 
Carapace more convex, and in the female broad in front. Posterior row of eyes straight or slightly recurved 
or procurved, subequal, equidistant, nearly one and a half diameters apart ; anterior row straight, centrals 
much smaller, closer, half a diameter apart, a full diameter from the laterals. (In the male sex the eyes 
are more closely grouped and the mandibles very much developed.) Maxille nearly three times longer 
than broad, enlarged at the apex. Protarsi i. and ii. with one pair of long spines at the base beneath ; 
tibiee i. and ii. with three pairs, one being apical. (In the male there is often a single additional protarsal 
spine towards the apex.) Lower margin of the fang-groove of female with 4-5 small stout teeth, the 
three anterior ones larger ; upper margin with 4 teeth. Lower margin of the mandible of the male with 
3 or more small teeth, upper margin with 3 or 4. Sternum produced into a short conical point behind. 
Spiracular rima situated usually in front of the middle, at from one-fourth of the distance between the 
genital rima and the base of the spinners to very near the middle. 
To the genera Teudis and Sillus belong the greater part of the species from Brazil 
referred by Keyserling to Anyphena. I have not seen the type of Isigonia, but a 
specimen of Memnon peragrans, O. P.-Cambr., from the Lower Amazons, agrees with 
Simon’s characterization of that genus. This author is, however, quite wrong in 
referring Pelayo, O. P.-Cambr., to Isigonia (Hist. Nat. Araign. éd. 2, ii. p. 207), since 
the spiracular rima in the latter is situated close to the spinners, 
Males. 
A. Tibia of palpus with a basal spur in addition to the apical one. 
a. Basal spur long and bifid at the apex, not studded with cuspules . peragrans, O. P.-Cambr: 
6. Basal spur shorter, divided into two branches, the outermost of 
which is studded with cuspules . . . . 2. 1s 6 © © © gentilis, O. P.-Cambr. 
B. Tibia of palpus with an apical spur only. . . . 2 + e « » mordax, O. P.-Cambr. 
