This brief guide has been prepared during a stay in Malaysia as an aid to local collectors and turned out to fulfil a need. A wider public may find it of use as well. The writer gratefully acknowledges improvements by Dr. C. Bas, Leiden. (Ed.) As agarics and boleti belong to the most common, but also to the most difficult fungi to collect and preserve, this guide is written particularly for this group of macromycetes. Obviously many recommendations and indications will apply to other fungi with fleshy fruit-bodies as well. Macromycetes with nonfleshy fruit-bodies can be treated in the same way, but for identification afterwards extensive descriptive notes are usually not necessary.