From the introduction:
"In the first volume of the Synopses, Dunger (1994) already explained the principles of this series, so I only need to explain certain peculiarities of this part, the Symphypleona.
1. In this volume the whole group Symphypleona Börner is considered, i. e. the Neelida and the Eusymphypleona; whereas the species Podura aquarica and Mackengiella psocoides are not included (see p. 13).
2. The Palaearctic, as understood here, does not include Nepal. As I am assuming the southern border in East Asia to be the 30th parallel, the Ryukyu Islands arc not included, and in E China the border is just south of the Yantze Kiang River. Difficult geographic names are spelled as in the Times Atlas of the World (1993). I was not able to correlate most of the older papers about former Yugoslavia to the present states, so I have used the expression >>former Yugoslavia<< throughout this work. The Nearctic species have been left out of the keys since there is much new material in the USA with several new descriptions underway (see Christiansen & Bellinger 1981, 2nd edit. 1998).
3. New data have been included up to February 1997 and partially up to September 1998."