Kc7v : Xortli of Eiis^laiu/ Psciidosroi-pions. 295 



of Arachnids,' Entomologiske Meddelelser, IV. (1893-4), pp. 137- 

 251; (5) Lankester [and Pocock], ' Arachnida,' Encyclopcedia 

 Britannica, ed 10, I. (1902), pp. 519-546. In the case of species 

 with which I am not acquainted, the characters found in the 

 key have been taken without verification from the work of the 

 Rev. O. P.-Cambridg-e. Some explanation of the terms used 

 may perhaps be necessary ; and it may accordingly be stated 

 that the chelicerce are the appendages of the first pair, the pedi- 

 palps those of the second pair, and the legs those of the third, 

 fourth, fifth, and sixth pairs. The pedipalps and legs consist of 

 coxa, trochanter, femur, tibia, and tarsus, the last part being 

 always of two pieces in the pedipalps wliere its first piece forms 

 the hand and fixed finger, and its second piece the 7novable 

 finger. In the legs, the femur also may be of two pieces, or it 

 may have a small part — the trochantin — more or less separated 

 from it at the base. All the appendages belong to the fore- 

 body, the dorsal covering of which is the carapace, while the 

 tergites are the plates of the upper surface of the hind-body. As 

 regards the local notes in Section III., it must be explained that 

 the mark ! is used to indicate records which have the authoritv 

 of Mr. Cambridge's specific determinations ; while those for 

 which I am alone responsible are marked with the letter K. 



My grateful acknowledgments are due to Mr. Cambridge for 

 great kindness in naming specimens, from various parts of 

 England, for many years past. 



I. A KEY TO THE BRITISH PSEUDOSCORPIOXS. 



1. Chelicerse small; carapace rounded in front, with one or two 



grooves; tergites with median division ... .. ... ... -; 



2. ChelicerEe larg'e ; carapace truncated in front, without grooves ; 



tergites without median division ... ... ... ... ... j ;; 



3. Carapace with one groove ; first and second legs without 



trochantin ... ... ... ... ... ... mnseorum. 



4. Carapace with two grooves ; first and second legs with trochantin 5 



5. Eyes none ... ... ... ... ... ... ... ... ... 7 



6. Eyes two ... ... ... ... ... ... ... ... ... 15 



7. Hairs simple ... ... ... ... ... ... ... ... ... 9 



8. Hairs clavate.. . ... ... ... ... ... ... ... ... 11 



9. Hand distinctl}' longer than broad ; fingers equal to hand in 



length ... ... ... ... ... ... ... iiodosiis. 



ID. Hand nearh- or quite as broad as long; fingers shorter than 



hand ... ... .. ... ... ... ... insiietus. 



I I. Hand very tumid, but slightly longer than broad ; fingers equal to 



hand in length .... ... ... ... ... ... ciinicoides. 



\2. Hand less tumid, distinctl}' longer than broad; fingers (at least 



the movable one) a little longer than hand ... ... ... 13 



iyo3 August I. 



