208 
Psyche 
[June 
Compsoneura formosa (Brongniart) 
Figure 23 
Zeilleria formosa Brongniart, 1885: 63. 
Compsoneura formosa, Brongniart, 1893 : 336, pi. 19„ fig. 2; Handlirsch, 
1906: 104, pi. 11, fig. 21; Lameere, 1917: 146. 
This species was based by Brongniart on specimen 19-2, which 
consists of a very poorly preserved fragment of a hind wing. Its 
assignment to Compsoneura was questioned by Handlirsch (1906), 
but Lameere accepted that position. 
The hind wing is very weakly preserved, and apparently flattened, 
so that the branches of M and Cu cannot be clearly separated from 
each other. The cross veins are clearly preserved only in the apical 
third of the wing; in the rest of the wing only a few cross veins are 
visible. Nevertheless, Brongniart’s assignment of formosa to Comp- 
soneura is probably correct, since the insect shows similar patterns of 
cross veins and of color to that of fusca. 
Hind wing: length 51 mm, width 19 mm. Rs with seven branches, 
the first forked. About eight anal veins, some of them forked. 
Cross veins dense and fine, often anastomosed, less abundant in the 
anal area. 
This species differs from fusca in its larger size, in the more ex- 
tensive branching of M and Cu, and in the strengthening of the 
costal margin by the concentration of veins there. 
Family Mecynostomatidae fam. nov. 
I am establishing this family on the genus Mecynostomata , repre- 
sented by a single species, dohrni Brongniart. The type and only 
known specimen, which has the venation faintly preserved, was fig- 
ured only roughly by Brongniart; it was subsequently incorrectly 
described by Handlirsch (1906), who confused the beak with a leg 
and referred the genus to an unidentified family in the Palaeodictyop- 
tera. Lameere (1917) corrected some of Handlirsch’s errors and 
noted that the genus required a separate family, although he did not 
propose a name for it. Lameere’s description of both the body struc- 
ture and the wings is very inaccurate, and his conclusions on the 
relationship of Mecynostomata to the Homoiopteridae is without 
real foundation. 
Using glycerin on the wings to improve the visibility of the vena- 
tion and a coating of ammonium chloride for the improvement of 
the impression of the body structures, I have been able to work out 
the structure of the head, with its beak, the front leg, and three 
