1963] 
Carpenter — Carboniferous Insects 
121 
and learning that the other counterpart had subsequently been located 
in the Museum, I made an examination of both counterparts in 1961, 
with special reference to the questions raised by Demoulin. Finally, 
in early 1963, during another visit to the Museum, I made a final 
check on the specimen with reference to the drawings which accompany 
the present paper. 3 In the following account I have attempted to 
redefine the family Triplosobidae as well as the genus, using termi- 
nology consistent with that employed in my previously published papers 
on fossil mayflies. 
Order Ephemeroptera 
Family Triplosobidae Handlirsch, 1906 
Fore and hind wings similar in form and venation; Rs having two 
intercalary veins and arising directly from R ; MA free from Rs, un- 
branched. Abdomen slender, with prominent cerci and a median 
caudal filament. 
Genus Triplosoba Handlirsch, 1906 
Triplosoba Handlirsch, 1906, Foss. Ins.: 312 \_pro Blanchardia Brongniart 
1893 : 325 ( non Castleman, 1875)]. 
Since only one species of this genus is known, generic characters are 
assigned arbitrarily. It seems probable, however, that the branched 
condition of MP, the presence of IMP, and the unbranched CuA are 
features of generic significance. 
Type species: Blanchardia pulchella Brongniart 
Triplosoba pulchella (Brongniart) 
Plate 14 
Blanchardia pulchella Brongniart, 1893, Recherches Hist. Ins. Foss.:328, fig. 
14; pi. 18, fig. 8, 9. 
Triplosoba pulchella Handlirsch, 1906, Foss. Ins.: 312, pi. 32, fig. 6, 7; Hand- 
lirsch, 1911, Congr. Intern. Entom. : 183, pi. 8, fig. 12; Lameere, 1917, 
Mus. Nat. Hist. Natur., Bull., 23:103; Martynov, 1924, Rev. Russe Ent., 
18:158, fig. 3; Tillyard, 1932, Amer. Journ. Sci., 23:101, fig. 1; Demoulin, 
1956, Inst. Roy. Sci. Nat. Belgique, Bull., 32(14) :l-8, fig. 1; pi. 1. 
The type specimen is in the Institute de Paleontologie, Museum 
National d’Histoire Naturelle, Paris. It consists of both counterparts, 
one represented (natural size) in Brongniart’s figure 8, plate 18 of 
his 1893 monograph, the other in his figure 9; these illustrations are 
reproduced in the present paper, on plate 13, figure c, and plate 14, 
3 In connection with this most recent visit, I am indebted to Professor J. P. 
Lehman, Director of the Institut de Paleontologie of the Museum, for placing 
the Commentry fossils at my disposal. 
