404 
Psyche 
[December 
shortly beyond their origin (Figure 3). The cerci as preserved are 
17 mm long but they are clearly broken off at this point and were 
therefore longer in the original insect. Between the cerci there is 
a pair of short, stout processes, faintly but clearly preserved (length 
1.5 mm). The species is named for Dr. Sergius Mamay, who has 
sent me many fine specimens of Paleozoic insects during the past 
decade. 
Holotype: No. 170365 U. S. National Museum; collected by Dr. 
Sergius Mamay in May, 1969, at an exposure of the Madera Forma- 
ation in the Manzano Mountains, southeast of Albuquerque, New 
Mexico. 
The type specimen consists of a nearly complete insect, with the 
two right wings outstretched and the two left wings superimposed 
(see Figure 1). The head is completely missing but there are rem- 
nants of the prothorax and of the anterior legs; the main part of 
the abdomen is not present but the last several segments and the cerci 
can be seen very clearly. 
This insect has many interesting features. With a wing expanse 
of about 32 mm, it is among the smallest Palaeodictyoptera known. 
The species of Lycocercus were much larger, with wing expansions 
of from 140 mm to 150 mm. The transverse banding on the wings, 
although strikingly preserved, is not uncommon in the Palaeodicty- 
optera, including the species of Lycocercus. The form of the cerci 
is especially interesting, the marked bowing being very distinct. 
This curvature of the cerci has been seen or at least suspected in 
several species of Palaeodictyoptera, from both Upper Carboni- 
ferous and Permian deposits. The type specimen of Lycocercus 
goldenbergi, although preserved in a side view, shows a similar curva- 
ture (see Kukalova, 1969, Fig. 32). Two faintly preserved but dis- 
Fig. 3. Dunbaria fasciipennis Tillyard (Lower Permian of Kansas; 
from original drawing by Dr. Kukalova, based on type specimen in Pea- 
body Museum, Yale University). 
