68 
Psyche 
[March 
Palaeodictyoptera (1906) but subsequently (1919) transferred it 
to the Megasecoptera. This position has been the one generally ac- 
cepted, although Bolton (1921) retained it in the Palaeodictyoptera. 
One of the specimens recently sent to me by Mr. Walter Dabasins- 
kas is a remarkably well preserved wing obviously belonging to the 
family Brodiidae and close to Brodia , but clearly requiring a new 
genus. The excellent preservation of this fossil has answered some 
of the questions which have been raised for many years about the 
Brodiidae. Before describing this new specimen and discussing its 
affinities, it is necessary to redefine the family Brodiidae on the basis 
of this additional record and the specimens of Brodia priscotincta 
which I have examined in the British Museum, the U.S. National 
Museum, and especially in the Scudder collection at the Museum of 
Comparative Zoology. 
The Brodiidae as now known possessed petiolate wings. The 
costal vein was distinctly serrate on both its anterior and posterior 
borders; the serrations also extend along the posterior border of the 
wing, although in general they are smaller and more widely spaced; 
in some the serrations along the posterior border of the petiole form 
stout setae; Sc is close to R basally and parellels Ri for most of its 
length ; it apparently merges with the costa somewhat beyond mid- 
wing but retains its identity until near the apex of the wing (see 
plate 14) ; R and Ri are nearly straight until near mid-wing, be- 
yond which Ri, which is unbranched, curves slightly away from the 
costal margin; Rs arises well before mid-wing and forms three or 
four branches; M arises as an independent vein at the base of the 
wing, curving slightly posteriorly and forking to produce MA; MA 
is unbranched and diverges anteriorly towards the origin of Rs, 
which it very nearly touches; MP divides shortly after the level of 
the origin of Rs, producing at least two terminal branches ; Cu 
arises as an independent vein at the base of the wing, soon dividing 
into CuA, which curves slightly anteriorly towards M before turning 
toward the posterior margin; it is without branches; CuP terminates 
slightly beyond the origin of Rs. 1 anal vein only is present, this 
terminating on the posterior margin close to the base of the wing at 
about the level of the origin of MA. A fine archedictyon may be 
present over much of the wing surface but true cross veins, some- 
times irregular and sometimes nearly straight, occur on certain parts 
of the wing. Differences in the shape of the fore and hind wings 
are unknown and the body structure is also unknown. 
The family is now represented by two genera: Brodia, from the 
