022 Hev. J. E. Hull on Laud Mites 



liave not hitlierto been met with in the region now dealt with, 

 jiml are marked with an asterisk in the appended list. 

 Localities are indicated by letters as follows : — 



A. Prince Charles Foreland (July 1-10). 



B. Bear Island (Jmie 14-22). 



C. Cape Bohenian (July 12-16). 



D. Gips Valley (June 26). 

 F. Advent Bay (July 18). 



K. Bruce City, Klaas Billen Bay (July 25-August 11). 



I. Thrombidiidae. 



1. Bdella littoralis, Linn. K. 



Generally distributed in the Arctic ; also on the coasts of 

 Northern Asia and Europe. 



2. * Bdella groenlandica^ Trag. A, B, C. 



Type from Greenland (^Levinsen). 1 have seen examples 

 from Jan Mayen {Brtstowe, 1921). Probably passed over in 

 previous collections as a small form of littoralis. No other 

 records. 



3. Bdella decipiens, Thor. A, F, I), K. 



Exclusively Arctic. Generally distributed, but apparently 

 less frequent than littoralis. 



■4. ^Bdella pallipes, L. Koch. K. r 



Siberia, Novaja Senilja. This seems to have been con- * 



foundtd with littoralis until quite recently, yet it is quite I 



common in Britain at all altitudes, but most abundant tiom i 



about 800 feet upwards (in the north of England). Tiiigardh f 



(' Arktischen Acariden/ 1904) makes it a variety of ^. capil- 

 lata, Kramer, which itself appears to be a mere casual form 

 of littoralis. In reality pallipes is a very distinct species, 

 easily recognized by the equal length of the third and fourth 

 joints of the palp. 



5. Cyta hrevirostris, L. Koch. A, B, K. 



Apparently general in the Arctic, but not noted beyond ' 



that area, where its place is taken by C. latirostrisy Herm. , 



It is cited by Tiagardh [op. cit.) as a variety of the latter. It | 



is quite different, however — most obviously in the greater 

 relative length of the terminal article of the palp, which is 

 about two-thirds of the length of the second (in latirostris it 

 is less than half). C. latirosi7ns is considerably larger and 

 ranges southward to the Mediterranean. 



