The figures which accompany this text are intended to supplement the keys and taxonomic discussions to illustrate features used in distinguishing between the various genera and species. Usually, simple line drawings are sufficient and details of sculpturing and vestiture are omitted. When such details are critical in identification they may be illustrated as supplemental figures (as in Fig. 38a).
     A few habitus figures were done by Ruth Ann DeNicola and we are grateful for the opportunity to use them. The remaining figures are the work of the senior author.