1966] 
Carpenter ■ — Protorthoptera and Orthoptera 
85 
pc 
Text-figure 19. Parelcana dilatata, n. sp. Drawing of fore wing (holo- 
type). 
Parelcana dilatata, n. sp. 
Text-figure 19 
Fore wing: length of preserved part 19 mm.; width, 5 mm.; 
estimated length of complete wing, 36 mm.; costal veinlets slightly 
oblique, mostly unbranched ; branches of CuA short. Details of vena- 
tion shown in figure 19. 
Holotype: No. 6304 ab, Museum of Comparative Zoology (col- 
lected by F. M. Carpenter in lower layer of Elmo limestone). This 
type consists of a well preserved basal half of a fore wing. 
The precostal area of this wing is unusually prominent. Although 
the wing is incomplete, that part which is preserved seems to be 
definitely coriaceous; the cross veins are preserved as distinct ridges, 
which are especially prominent when observed under oblique light. 
Genus Petrelcana, new genus 
Fore wing: distinctly coriaceous; slender. Precostal area not so 
long or so broad as in Parelcana , but projecting beyond the line of 
the anterior margin of the wing; costa little-known, irregularly 
formed; Ri with several oblique, almost longitudinal veinlets be- 
yond the end of Sc; at level of end of precostal area, costal space 
much wider than space between Sc and R; termination of iA well 
beyond the end of 2A; cross veins more widely separated than in 
Parelcana and more irregular, forming a coarse reticulation in parts 
of the anal area. 
Type-species: Petrelcana elongata , n. sp. 
Petrelcana elongata, n. sp. 
Text-figure 20 
Fore wing; length, as preserved, 33 mm.; width 7 mm.; estimated 
complete length, 40 mm.; veinlets widely separated and irregular in 
