Book digitized by Google fr om the library of the University of Michigan a nd uploaded to the Internet Archive by user tpb.
Paged continuously: v. 1: 2 p.l., 192 p., v. 2: 2 p.l., [193]-476 p., v. 3: 2 p.l., [477]-585 p., v. 4: 2 p.l., [587]-658 p
By Francis Walker, edited by John Edward Gray
pt. I. Phryganides. Perlides.--pt. II. Sialidœ. Nemopterides.--pt. III. Termitidœ. Ephemeridœ.--pt. IV. Odonata