June, 191 1.] 



EwiNG : Notes on Pseudoscorpions. 



73 



other hand the forms found in dwelling houses, under barn floors, in 

 fallen hay, etc., are not restricted as much in their movements and are 

 much stouter. 



In regard to the geographical distribution it may be stated that 

 as a rule the northern forms are much darker than the southern, 

 the Pacific coast variety has stouter pedipalps, with much shorter 

 fingers (see PI. II, Fig. 4) ; specimens from Texas and New Mexico 

 are transitional between those found in California and those of the 

 North Central States. Their pedipalps are considerably stouter than 

 the pedipalps of the eastern forms, but not so stout as the pedipalps 

 of the Pacific coast forms. The variety from the southwest should 

 be called muricatus Say, and on the coast scabriciilus Simon. The 

 northern variety with the black pedipalps might be called nigripalpiis 

 n. var., and the forms with strongly developed tubercles on the 

 cephalothorax and palpi, dcntatus n. var. 



1761 

 1767 

 1778 



1804 

 1804 



1817 



1821 

 1834 

 1834 

 1843 

 1843 

 1855 



1855 



1869 

 i86q 



The Synonymy of Chclifer cancroides Linn. 



Cliclifer cancroides Linne. Faun. Suec, ed. XXI, 345. 

 Phalangiuni cancroides Linne. Syst. Nat., edit. XII, p. 1028. 

 Chelifer europccus De Geer. Mem. Ins., VII, p. 355, PI. XIX, 



figs. 14-15. 

 Chelifer cancroides Hermann. Mem. apter., p. 114. 

 Chelifer cancroides Latreille. Hist. nat. des crust. & ins., 



VII, p. 141, PI. VI, fig. 2. 

 Chclifer hermanni Leach. Zool. Misc., HI, p. 49, PI. 142, 



fig- 3- 

 Chelifer muricatus Say. Jour. Acad. Phila., II, p. 63. 

 Chelifer cancroides Hahn. Arach., II, p. 52, fig. 139. 

 Chelifer ixoides Hahn. Arach., II, p. 53, fig. 140. 

 Chelifer granulatus Koch. Arachniden, Bd. X, p. 37, fig. /jj. 

 Chelifer cancroides Koch. Arachniden, Bd. X, p. 41, fig. 780. 

 Chelifer cancroides Menge. Ueber die Scheerenspinnen, Cher- 



netidae, p. 30, Tab. IV, fig. 5. 

 Chelifer rhododactylus Menge. Ueber die Scheerenspinnen, 



Chernetidse, p. 32, Tab. IV, fig. 6. 

 Chclifer cancroides Hagen. Rec. Amer. Ent., p. 51. 

 Chelifer muricatus Hagen. Rec. Amer. Ent., p. 51. 



