502 REVIEWS 
mian, nine of which are described as new. ‘Three genera are referred to 
the Ephemerids, and one doubtfully to the Perlidae. The group Paleo- 
hemiptera is proposed for two genera, Presbole and Scytinoptera, regarded 
as ancestral to the Hemiptera. Mantidae-like forms are represented by 
the genera Paleomantis and Petromantis; the Blattoidea are represented 
by two genera, Limmatoblatta and Aissoblatta. Sellards regards the Paleo- 
zoic, Mesozoic, and modern cockroaches as making up a group of super- 
family rank under the order Orthoptera, for which the term ‘‘Blattacea” is 
proposed. The body and wing structure of Paleozoic cockroaches is 
described, and the lines of specialization are discussed. In the first of 
the papers listed Angus described a new cockroach, Eitoblattina Gaudryt, 
of which one hind wing, lacking the anal area, and the two front wings 
are preserved. ‘The second paper by this author records a reexamination 
of the supposed Silurian fossil insect. Paleoblattina Douvillet, with the 
conclusion that this fossil does not represent an insect but pertains to the 
trilobites, and is in fact a part of the genal angle of one of the Asaphide. 
t1-16. Nine orders are regarded by Handlirsch as present in the Ameri- 
can Paleozoic, as follows: Paledictyoptera, Protodonata, Megasecoptera, 
Hadentomoidea (new order), Hapalopteroidea (new order) Mixotermit- 
oidea (new order) Protorthroptera, Protoblattoidea (new order,) and 
Blattoidea. Of these the first eight are regarded as being replaced in later 
deposits by other orders, the Blattoidea alone having continued to the 
present time. Twenty-five genera are referred to the Paleodictyoptera, 
seventeen of which are new. Two Protodonate genera are recognized 
from the American Carboniferous, Paralogus Scudder and a new genus, 
Paletherates. Two American genera, Rhaphidiopsis Scudder and Adt- 
aphtharsia gn. n, are referred to the order Megasecoptera. The new order 
Hadentomoidea is based upon a single specimen, Hadentomum amert- 
canum gn. sp. n, from the collection of Mr. Daniels. The new order 
Hapalopteroidea includes but one American specimen, of which one front 
wing only is known. ‘The provisional new order Mixotermitoidea is based 
upon two genera, Mixotermes from Saxony and Geroneura from New 
Brunswick. The Protorthoptera embrace a series of forms transitional 
between the Paledictyoptera and the Orthoptera. Sixteen genera are 
referred to this order. The Protoblattoidea are considered transitional 
between the Paledictyoptera and the Blattoidea. Thirteen genera are 
referred to this order. An entirely new grouping of the cockroaches is 
adopted. The Paleozoic representatives of this order are grouped into 
eleven families, ten of which are here established as new. Eighty-nine 
genera are recognized, sixty-nine of which are described as new. A table 
