404 ARACHNIDA ARANEAE CHAP. 



that they are usually marked with red or yellow spots 011 the 

 abdomen. They have been referred to in the section on the 

 venom of spiders (see p. 362). 



The genus Steatoda possesses one English species (S. Inpunctata) 

 which is extremely common in buildings and in the angles of 

 walls, and is a rather striking spider, with dark cephalo thorax, 

 and livid brown abdomen with a broken white stripe down the 

 middle. Several closely allied genera are also sparingly repre- 

 sented in this country, among which may be mentioned Crustu- 

 lina (two species), Asagena (one species), Teutana (two species), 

 LitJiyphantes (one species), Laseola (five species), and Euryopis 

 (two species). In some of these the male is provided with a 

 stridulating organ between the thorax and abdomen (Fig. 183, 

 p. 327). The remarkable genus Tetrablemma (see p. 318) is 

 considered by Simon to have affinities with this group, though 

 Pickard-Cambridge, who first described it, is inclined to rank it 

 among the Dysderidae. 



(iv.) The PHORONCIDIINAE are a remarkable group of spiny 

 Theridiids whose superficial resemblance to the Gasteracanthinae 

 of the Epeiridae (see p. 409) has often deceived 

 Arachnologists as to their true affinities. There 

 are eight genera, all exotic, inhabiting hot 

 countries, and spinning a Theridion-Mke web 

 on bushes. Phoroncidia has twelve species in 

 South Asia and Madagascar. Trithena (Fig. 

 208) is its American representative, five species 

 being found in South America. Uhsanis has- 

 FIG. 208. Trithena about twenty species, and extends from South 

 tricuspidata 9. America to Australia. 



x 3i. (After 



Simon.) (v.) IJie EftiGONiNAE are an immense group 



of minute, sober-coloured spiders, which include 

 the " Money-spinners " of popular nomenclature, and are largely 

 responsible for the gossamer which fills the air and covers every 

 tuft of grass in the autumn. The number of species described 

 is very large and constantly increasing, and more than a hundred 

 are recognised as British. 



Desperate HTmis have been made of late years to grapple with 

 this almost unmanageable group, but the multitude of genera 

 which have been proposed can hardly as yet be considered to be 

 filially established. The small size of these spiders, which 



