358 
Psyche 
[December 
good illumination shows that there is unquestionably a 
cross-vein between Cu2 and 1A basally, and another one 
between 1A and Cu2. The supposed absence of these cross- 
veins was used by Tillyard as key characters. 1A does not 
join Cu at the base of the wing, but curves downward and 
away from the stem. 
(4) Stigmatazans. The type specimen has a broad 
costal area at the base, and is shaped like the preceding 
fossils. The pointed appearance of the apex, as shown in 
Tillyard’s figure, was due to the fact that the anterior mar- 
gin was covered by a piece of limestone when he studied it. 
By removing this fragment, I found that the apex was 
more rounded. The pterostigma, which is slightly dark- 
ened, is not so noticeable as that in gracilis. There is no 
cross-vein visible at the base between Cul and Cu2, but 
this absence is due in all probability to the poor preserva- 
tion at that part of the wing; the cross-vein at the distal 
ends of these veins is exceedingly faint. 
(5) Kansasensis . This wing is not so narrow as shown 
in Tillyard’s figure (see my photograph of the type, fig. 
12) ; when I first examined the fossil, the anterior margin 
was partly covered by a piece of the matrix, but this was 
removed and the costal area was found to be as broad as 
in the other fossils. The removal of this chip also exposed 
the subcosta, which is partly shown in Tillyard’s figure, al- 
though it seems to have been confused by him with the 
base of the radius. The type specimen is splendidly pre- 
served and is one of the best representatives of Doter which 
I have seen. 
(6) Stenobasis . The apical portion of the holotype 
wing was not missing, as stated by Tillyard, but only cov- 
ered by the limestone. When this matrix was removed 
and the whole wing exposed, I found that the shape was 
identical with that of affinis; the costal area is broadened 
basally. The pterostigmal area, not seen by Tillyard, is 
fully as dark as that in stigmatazans. Even under the 
best illumination and highest power of binocular magnifica- 
tion I could not discern 1A in the type, or the two cross- 
veins shown by Tillyard between 1A and Cu2. The base 
