Pseudoscorpions of the genera Garypus, Pseudochthonius, Tyrannochthonius and Pachychitra

Whilst visiting the Leeward Group, in 1936—1937, I couldn’t help being fascinated by the striking occurrence of representatives of the arachnid order Chelonethida on every island of this arid region which invited me to an investigation of its soil fauna. This first publication of a serial on a group in which so much taxonomical work has still to be done, may be considered as the inevitable aftereffect of these first-sight impressions. My grateful thanks to JOSEPH C. CHAMBERLIN (Forest Grove, Oregon) and C. CLAYTON HOFF (Fort Collins, Colorado) for their interest in my work and to WILLIS J. GERTSCH and E. BROWNING for letting me have the loa.n of some material deposited in The American Museum of Natural History and the British Museum (Natural History).