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Show 1 9 0 3 . ] GEOGRAPHICAL DISTRIBUTION OF SPIDERS. 3 4 3 P art II. D ist r ibu t io n of th e F am il ie s , S u b f am il ie s , an d G en er a of M yg a lom or ph/E, and the evidence thus supplied as to their Original Habitat and the Lines of Migration followed in Dispersal. Family D ip l u r id ^e . The Dipluridse are the most widely distributed of all groups of Mygalomorphse, being found practically all over the world to the south of about the 40tli parallel of north latitude. The numerous groups, however, into which the genera fall present some features in their geographical range of considerable interest. 1. Subfamily D ip l u r in ^e .-The genus Brachythele1 is met with in the Mediterranean Region, Central Asia, and the Southern States of North America. Nearly allied to it are Hapalothele from Madagascar ; Brachytheliscus from Natal; Aname, Ixamatus, Chenistonia, and Dekana from Australia and Tasmania; Fufius from Central and South America; Trissothele from Chili; Lycinus from the Argentine. South America is also the home of Trechona, Diplura, Uruchus, Harmonicon, and Melodeus. 2. Subfamily M a c r o th e l in ^e .-This subfamily is divisible into four groups. (a) The Macrothelse:-Macrotliele occurs in Spain, China, Burma, Singapore, and Java. Nearly related are Fhyxioschcema from Transcaspia, Stenygrocercus from New Caledonia and Queensland, and Forrhothele from New Zealand. Ischnothele is represented by species from India, Madagascar, S. & W. Africa, and Central and South America; and Evagrus is known from S. Africa and Central America, whence it extends into the Southern States of North America (Idaho). (h) The Hexathelse contain two genera-Hexathele from New Zealand, and Scotinoecus from Chili. (c) The Atraces contain the genera Atrax and Hadronych*, from Eastern Australia. (d) The Masteria?, comprising Accola and Masteria, whioh are probably identical, occur in Venezuela, the Philippine Islands, and Upolu. The presence of Brachythele in the Mediterranean and Sonoran areas, and of nearly allied forms in South Africa, Madagascar, and all over South America, suggests immigration from the north into these countries of the Southern hemisphere. On the other hand, the entire absence of related types from the area lying between and including India and Austro-Malaysia, and the reappearance in Australia of genera closely allied to Brachythele 1 This genus has also been recorded from S. Africa, Madagascar, S. America, and Australia. It is probable, however, that the species referred to it belong to one or other of the allied genera from these areas. |