THE GENEEA AND SPECIES OF SYMPHYLA. 31 



Dr. A. Stuxberg), England (Devonshire, coll. by Mr. R. I. 

 Pocock), Germany (Marburg, coll. by Mr. C. Borner), Austria 

 (Razzes, in Tyrol, coll. by Dr. F. Meinert), France (Meudon 

 and Arques, coll. by Prof. E. L. Bouvier), Italy (Rome, coll. 

 by Dr. F. Silvestri; Scilla, Palmi, and Aspi'omonte, in 

 Calabria, coll. by myself), Algeria (Bona, coll. by Dr. F. 

 Meinert; Regions des Dayas, coll. by Mr. F. Lesne). Latzel 

 says he has seen specimens from Russia; C. v. Porat (in 

 'Entom. Tidskr. Stockholm,' 1887, p. 39, and 1889, p. 48) 

 enumerates several localities in the southern part of Norway 

 and Sweden, northwards to Christiania and Upsala, at about 

 60° Lit. N. The species is evidently common from the southern 

 part of Sweden through the whole of Europe to Algeria. 



Variation and Probable Geographical Distribu- 

 tion out of Europe. — A large specimen from Denmark 

 measures 5"4 mm. The specimens from Bona are large, and 

 one of them is the largest individual seen by me, but it is 

 only slightly longer than specimens from Rome; the Algerian 

 specimens agree completely with those from Europe. Fifteen 

 specimens captured by Dr. F. Silvestri, and labelled Buenos 

 Ayres, August 7th, 1898, could not be distinguished with 

 certainty from European individuals. The largest South 

 American specimen lueasures 5'4 mm. in length; its claws on 

 the first and on the last pairs of legs are shown in figs. 2 h 

 and 2 a ; the claws of the same pairs, the twelfth leg, and the 

 cercus of the left side of a specimen measuring 3*5 mm. are 

 shown in tigs. 2 c — 2/; the differences between these parts 

 and the same of the European specimens shown in figs. 1 m 

 — 1 u are probably casual or originating from local variation. 

 Furthermore, I have examined a few specimens captured by 

 Prof. W. M. Wheeler at Austin, Texas; the largest specimen 

 is 5' 7 mm., but the others are rather small. The large 

 specimen differs essentially from European forms by the 

 posterior claw (fig. 3 a) on the last pair of legs being more 

 robust than in these, and besides almost longer than the 

 anterior claw, which is shorter and more curved than in 

 Danish specimens; the claws on the first pair of legs differ 



