xv AVICULARIIDAE 389 



Their burrows are often surmounted by a sort of turret raised 

 above the level of the ground. 



(v.) The BAEYCHELINAE are burrowing forms which resemble 

 J^cnusia, but have only two tarsal claws. Lr^tujnl UK/ is the 

 only European genus, and has close affinities with certain South 

 American genera (Psalistops, Eutliycoelus, etc.). Pisenor inliabiis 

 tropical Africa, and Diplotliele, unique in possessing only two 

 spinning mammillae, is an inhabitant of India. 



(vi.) The AVICULAWINAE include all the large hairy spiders 

 which are commonly called Mycji.il> . The genus Phlogius, which 

 inhabits Southern Asia, forms a lidless burrow, though it has no 

 rastellus, but practically all the other members of the group are 

 non-terricolous, living under stones or in holes in trees, where 

 1 1 icy weave a slight web. They are nocturnal in their habits. 

 They all possess two tarsal claws, and the labium is free and 

 spined at the tip. Of the four spinnerets the posterior pair are 

 Lmg and three-jointed, while the anterior are short and not very 

 close together. 



The particular form of the tarsi and the nature of the 

 scopulae, 1 " claw-tufts," and spines upon them are of great import- 

 ance in distinguishing the members of this group. 



The Aviculariinae comprise about sixty genera from all the 

 tropical and suit-tropical regions of the world. 



The genus Isclinocolus extends into the Mediterranean region, 

 having representatives besides in Southern Asia and in Central and 

 Soul h America. Allthe tarsi have their scopulae divided longitudin- 

 ally by a band of hairs. Chaetopelma inhabits Egypt, Syria, and 

 Arabia,, and Cyclosternum is found in "West. Africa as \\ell as in 

 Central and South America. In these genera the scopulae of the 

 last two pairs of legs are alone divided. The largest known 

 spider is Tlii'i-iili<ixti />!Jn/n//\ \\hich is a native of (iuiana. It 

 measures 9 cm. (about three and a half inches; in length. 



h'/' //// 'linn is a genus of large spiders entirely confined to 

 the New World, where it possesses many species. The genus 

 Avicularia is also American, and includes a number of lar-e 

 long-haired spiders with short and very strong legs, on which 



1 The "scopula " is the ]>;id of e]osr->rt thick h;iir> \vllHi rovers the mi'l. T 



surface of the tarsus and often of the metatarsus. Tin' ' <-hnv-tut'i 

 longer hairs, ol'tm extending l>r\ c.n<l tlie r]:i\\ s. .in<l L'i\ in.i,' thr t'"tit iil.il'nl ;i|>] 

 ance. 



