30 
Psyche 
[March 
Microdictya Brongniart 
Heeria Brongniart, 1893: 338. 
Microdictya Brongniart, 1893 (pro Heeria Brongniart, nec Scudder, 1890) 
(Atlas): 28; Handlirsch, 1919: 6; Lameere, 1917: 159. 
Type species: Heeria vaillanti Brongniart, SD Handlirsch, 1922. 
Brongniart established the genus Heeria on two species, vaillanti 
and hamyi but in a foot-note of the same publication (1893, p. 28, 
Atlas) lie changed the name to Microdictya because of the homonymy 
indicated above. 
This genus includes less specialized species than Stenodictyaj 
with richer venation and with the archedictyon much more de- 
veloped. Both pairs of wings are more alike in shape than in 
Stenodictya. Bolton (1917, p. 9) was of the opinion that Micro- 
dictya and Sagenoptera Handlirsch were junior synonyms of Golden- 
bergia Scudder, 1885. Although this is possible, I am not recognizing 
this synonomy at this time; it is necessary that the specimens on 
which Goldenbergia were based be examined with special reference 
to this question. 
The characteristics of Microdictya are as follows: wings very 
much alike in shape and venation. Fore wings usually broadest at 
about mid-wing; anterior margin convex near the base; precostal 
strip pronounced ; postcostal vein short, simple, terminating on Sc. 
Sc not reaching the apical part of the wing; Rs originating before 
the end of the first third of the wing length; MA simple, MP 
branched twice, CuA simple, CuP branched once or twice. Anal 
area narrow with three to five pectinate branches. Hind wings a 
little broader, usually with the posterior margin slightly convex. The 
hind wing broadest at about mid-wing. Anal area a little broader 
than in the fore wing. Archedictyon very irregular, changing into 
irregular cross veins with many anastomoses in subcostal and sc-r 
areas. Wing membrane, veins and archedictyon with a dense cover- 
ing of pits. 
Microdictya differs from Stenodictya in having both wings 
broadest at about the middle, in having MP and CuP branched, 
the anal area narrower and by the generally oval shape of the 
wings. 
Species included in Commentry shales: Microdictya vaillanti 
Brongniart, 1893; Microdictya hamyi Brongniart, 1893; Micro- 
dictya lacroixi Meunier, 1910; Microdictya villeneuvei Meunier, 
1908. 
