1901.] AUSTRALIAN SPIDERS. 265 



Group Macrothele^. 



This group is very clearly distinguished from the foregoing by 

 the greater length of the superior mammillse, which are not much, if 

 any, shorter than the cephalothorax, by the distance between the 

 inferior mammillae, which are some four diameters at least apart ; 

 the tarsi and metatarsi of all the legs being without scopulae, and 

 the tarsal claws having the pectinations in a single row only, 

 crossing the claw diagonally from one side to the other. They 

 resemble one another in the sternal sigillse, which are of moderate 

 size and marginal, and in having the teeth on the falx-sheath in 

 one row only on the inner side, or one row and a small inter- 

 mediate at the lower end. 



The genera may be distinguished as follo-^s : — 



1. Mandibles protruding horizontally and normal... 2. 

 Mandibles short, strongly kneed at base and 



nearly perpendicular (as in Migas L. Koch, 



sec. Thor.) Cethegus Thor. 



2. Front row of eyes procurved. Lip smooth or 



only bespined at apex ; all tarsi generally be- 

 spined ; all legs the same thickness ; last joint 

 of spinnerets not longer than the middle, but 



finer, smooth and straight Stenygrocercus B. Sim. 



Front row of eyes straight or lightly procurved. 

 Lip profusely bespined nearly to base; last 

 joint of spinnerets as long as, or longer than 

 second 3. 



3. No spines on tarsi. Front pair of legs stouter 



than others Porrhothele Sim. 



All tarsi bespined. First and fourth pairs of legs 

 the same thickness Macrothele Auss. 



Grenus Cethegus Thorell. 



Cethegus Thorell, Ann. Mus. G-enova, 1881, p. 241. 



This genus, formed for a specimen brought from Cape York by 

 d'Albertis, I only connect provisionally with this group. It is 

 unknown to me ; and although {sec. Thor.) it has very long 

 spinnerets, the form of the mandibles would seem to make it 

 doubtful whether it should not rather be joined to the Migince. 



Cethegus lugubris Thor., he. cit. 



Grenus Porrhothele Simon. 



Mygale Walck. Ins. Apt. vol. i. 1837 (ad part, antipodiana). 

 Oteniza White, Proc. Zool. Soc. 1849, p. 3 (ad part, hexops and 

 mitipodurii). 



Hexops Auss. 1871 (ad part, tvhitei). 

 Macrothele Cambr. 1873 (ad part, huttoni). 



