34 ARANEIDEA. 
resembles very much that of Hurypelma longipes and E. serratum ; but all the species of Burypelma 
may be distinguished by the double spur beneath tibia i., besides the row of setee beneath tarsus iv. 
Hab. GuatEMALA, Petaxcatum (Sarg), Chicoyoito (von Turckheim). 
Two adult males have been taken in Guatemala—one (no. 653) at Chicoyoito by: 
Herr von Turckheim, the other (no. 1409) at Petaxcatum by Mr. Sarg. The latter is 
taken as the type. 
ACANTHOPELMA, gen. nov. 
Femur iv. without scopula on the inner side. Tarsal claws 2. Tarsi 1, li, ili., and iv., apical two-thirds of 
protarsi i. and i., apical half of iii., and extreme apex of iy. very lightly scopulate. ‘l'arsi i. and ii. with 
a single longitudinal central row of short spines, sometimes haired, beneath; tarsi iii. and iv. with a band 
of more numerous spines beneath. Protarsi i. and ii. with spines beneath. Tibia i. with a double spur 
at the apex beneath ; the inner spur short, obtusely pointed, with a short conical spur at the base on the 
outer side; the outer spur larger, broadly clavate and bilobed at the apex, the inner lobe the largest. 
Tibia 11. with rows of spines beneath, not constant in number or arrangement. Tibize and protarsi iii. 
and iv. very spinose. 
Carapace longer than broad, very flat or compressed in profile; fovea narrow, straight, transverse. Ocular 
group as in Hurypelma. 
Mandibles with a single row of teeth on the inner margin of fang-groove. Sternum oval-elongute, longer than 
broad. Sigilla distinct, three pairs, submarginal, besides the labial basal impressions. Labium quadrate, 
its apical third studded with cuspules; base of coxe of pedipalp also studded with cuspules over the inner 
anterior basal angle. Spinners 4, superiors as long as sternum; segments approximately equal in length, 
terminal segment slightly longer. 
1. Acanthopelma rufescens, sp. n. (Tab. II. figg. 13, 13 a-d, 3 .) 
Type, ¢, in coll. Godman & Salvin. 
3. Total length 16°5 millim. Carapace 7x 5:5. Legs: i. 23:5; ii. 21:5; iii, 18; iv. 28. 
¢. Carapace dull purple-mahogany, clothed with fine rufous silky pubescence ; mandibles clothed with three 
bands of rufous silky pubescence ; sternum and legs clothed with rufous pubescence. Abdomen delicate 
purple-brown, with double dorsal series of three or four pale orange transverse bars. 
The various points of structure have been detailed in the generic diagnosis, 
Hab. GuateMaua (Sarg). 
A single adult male. 
Although this form is undoubtedly allied to others of the group Cheetopelmates 
founded by M. Simon, yet I prefer for the present to place it amongst the members of 
the subfamily Theraphosine. 
Fam. DIPLURIDA. 
The unusual length of the spinners, which characterizes the more typical forms 
belonging to this family, is not noticeable in all those which are usually included in 
the group. The spinners aré, however, set wide apart at their base, and the tarsal 
claws are three in number, these characters separating the Dipluride from the 
Theraphoside. The habits of the species of Dipluride are somewhat different from 
