264 
Psyche 
[June-September 
sclerotized, dentate mandibles were present; the compound eyes 
were large; all legs were very long and slender, with five tarsal 
segments; the cerci and the median caudal filament were elongate, 
and the males possessed prominent claspers. 
This family, known only from the Permian, was originally de¬ 
scribed from the Elmo beds. It is represented in the Midco collection 
by 18 specimens of adults, as well as by numerous nymphs. All of 
the Midco specimens belong to the genus Protereisma and most of 
them to the large and striking species described below. 
Genus Protereisma Sellards 
Protereisma Sellards, 1907:347 [For generic synonymy see Tillyard, 1932, and Car¬ 
penter, 1933] 
This genus, the only one at present in the family, is known by five 
species from Elmo. The insect described by Guthorl (1965) as Prote¬ 
reisma rossenrayensis, from an Upper Permian deposit near Rhein- 
berg, West Germany, is almost certainly a protereismatid, but the 
published description is not sufficient for generic determination. 
Two other species, generally referred to as Protereisma uralicum 
Zalessky (1946) (upper part of Lower Permian) and P. apicale (Mar¬ 
tynov, 1927) (Upper Permian), both from the Soviet Union, are 
based on wing fragments that lack parts necessary for family deter¬ 
mination. At the present time, therefore, the genus Protereisma is 
definitely known only from the Lower Permian of Kansas and 
Oklahoma. 
Protereisma directum, n.sp. 
Figures 1-4 
Fore wing: length 26 mm, width, 6 mm; relatively long and nar¬ 
row, the front and hind margins nearly straight; the venation, typi¬ 
cal of Protereisma, is shown in figure 2. Holotype: no. 5180ab, 
collected at locality 15-L, Noble County, Oklahoma, by F. M. Car¬ 
penter. This is a complete fore wing, with excellent preservation. 
The two following specimens are designated as paratypes: no. 
5182ab, consisting of the four wings and parts of the body. The fore 
wing is 31 mm long and 7 mm wide; the hind wing, 28 mm long and 
6 mm wide. The body is preserved is dorso-ventral view; the head is 
2 mm long and 4 mm wide across the eyes; the prothorax is 1.2 mm 
long and 4 mm wide; the mesothorax is 3 mm long and 4 mm wide; 
