HANSEN: ON SIX SPECIES OF KOENENIA. 2*17 



for these reasons they are omitted. In the structure of the mouth 

 I found no difference worth mention. 



IV. Geographical Distribution. 



It is i)roved here that the order Palpigradi has a wide 

 distribution: southern half of Italy, Tunis, Siam and America 

 from Texas to Paraguay. But only as to one species, K. inira- 

 Inlis, it is possible to speak of a certain and yet moderately 

 e.xtended geographical range, viz. Roma, Calabria, Catania, Pa- 

 lermo and Souk el Arba in Tunis; each of the other species has 

 been only found, as yet, in one locality. Our present knowledge 

 of the species and their occurrence is certainly still very rudi- 

 mentary, but 1 wish to emphasize the extreme improbability of 

 finding the Italian form in remote parts of the world. Koc7ic- 

 nia, Paiiropus, Scolopcndrclla, Japyx, Campodea are generally 

 considered by Zoologists as very ancient types; several authors 

 have written that this antiquity should be connected with a very 

 wide distribution over remote parts of the world of at least one 

 of the European species of each of the groups mentioned (viz. 

 Kocn. uiirabilis, Paiiropus Hiixleyi Lubb., Scolopendrclla im- 

 maculata Newp., Japyx solifugiis Haliday and Campodca sta- 

 phylinus Westw.). But I believe that most and perhaps all 

 statements about this wide range of a species are quite wrong, 

 originating from insufficient knowledge of the species or insuffi- 

 cient study of the specimens. Here I prove this as to the order 

 Palpigradi, and I hope soon to publish other papers which shall 

 prove the same on at least two of the other types. The wide 

 geographical range of certain species of all the groups mentioned 

 should be positively denied until the animals have been studied 

 much better than they are at present — and then we shall cer- 

 tainly obtain results diftering widely from those rather dogmatic 

 statements now generally admitted. 



V. Description of the Species. 



Analytical Conspectus. 

 I. On the ventral side of the abdomen a group of five or six 

 spine-like setœ on the fourth segment and a protruding wart 



25 



