272 
Psyche 
[December 
Figure 4. Notorachis c wolfforum, n.sp. Drawing of holotype, No. PE 
21699, Field Museum; ant, antenna; hind wing represented by dotted lines. 
Black circles on abdomen mark the locations of spines on the posterior 
edges of the tergites ; the probable lateral margins of the abdomen are 
indicated by broken lines. 
ing. However, the prothoracic lobes of this species are extraordi- 
narily modified, nothing comparable to them having previously been 
observed in the Palaeodictyoptera. Since this insect is of unusual 
interest, generic and specific names are being assigned. 
Genus Notorachis, new genus 7 
This genus is apparently related to Lycocercus. The outer mar- 
gins of the pronotal lobes are heavily sclerotized and form a series 
of long spines; the more basal portion of each lobe is less sclerotized 
but there is a double row of blunt setae or tubercles extending trans- 
versely across each lobe (preserved as pits in the obverse). In Lyoo- 
7 The generic name is derived from a combination of noton (back) and 
rachis (spine) and is considered feminine. 
