— 612 — 
This beautiful species seems to be nearly related to laetus and dimidiatus of 
Thorell, but of the tibial spur of the former is said „ejus apex in duos dentes acumi- 
natos est fissus“, whereas of „tridens“ one would say „in tres dentes, &c.“ This 
spur in dimidiatus is spoken of as „dentem conicum acuminatum“; so that there 
is no question of the distinetness of the species, although the crimson pubescence is mentio- 
ned also by Thorell as distinctive of laetus. 
One could have wished that fortune had thrown some adult females in the way for 
examination. The general character is so strikingly suggestive of the New World forms of 
Acanthoctenus that one would be surprised not; to find a cribellum and calamistrum in 
the adult 9. It may not be so, of course, but Thorell has apparently never seen an adult 
of this sex and I am not quite clear as to the authority on which the abscence of these 
organs has been assumed. 
The following table will serve to show how the males of this genus may be 
distinguished: 
a) Tibial spur simple at apex, conical. (See Thorell) A. dimidiatus Thor. 
b) Tibial spur not simple at apex, bifid or trifid. 
a) Tibial spur bifid at apex. (See Thor.) 4A. laetus Thor. 
BD) 5 „ trifid at apex „ 5 A. tridens n. Sp. 
Family Heteropodidae Thor. 
Genus Olastes Walck. 
Clastes freicineti Walck. 
Ins. Apt. I, p. 577, 1857. 
Loc. Halmahera, Soah Konorah and Todahe. 
Known previouly from Amboina and New Guinea. 
Genus Sparassus Walck. 
Sparassus mygalinus (D ol.) 
Olios mygalinus Doleschall, Acta Soc. Sei. Indo-Neerland. V, p. 425 (1859); see also 
Thorell, Ann. Mus. Genova XIII, p. 188, 1878, 
