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Psyche 
[September-December 
diagnostic feature was the shape of the “scapular” vein (Rl), 
which formed an opposing curve to the costa. He was led to con- 
clude from Scudder’s drawing that Rl in ovalis was parallel to 
the costa. However, Scudder’s account in this respect was incor- 
rect and the reverse of the ovalis type shows clearly the opposing 
curvature of the costa and of Rl. The total length of the body of 
the type of mazonus is 29 mm. In this connection, we should note 
that the Yale University specimen that Handlirsch (1911) iden- 
tified and figured as mazonus (YPM 51) is not even a eucaenid. 
The specimen consists of parts of the hind wings and body, the 
front wings being completely absent. The fore femur, correctly 
drawn by Handlirsch, is long and slender, unlike that of ovalis. 
The venation of the hind wing of ovalis, as previously noted, is 
very little known, but what is known is very different from that 
of the Yale specimen identified by Handlirsch as mazonus. This 
represents a small species, incidentally, with a body-length of 
only 19 mm. 
E. attenuatus Melander (1903), in our opinion, is also ovalis. 
The type specimen, no. 4749 in the Eagan collection of the Chicago 
Academy of Sciences, has not been found there at this time. How- 
ever, Melander’s description fits ovalis perfectly. He considered 
the specimen distinct from ovalis because his specimen did not 
possess the “median keel” on the last abdominal segments, as 
described by Scudder in his account of the type of ovalis. How- 
ever, the “keel” is the ovipositor, now known to be characteris- 
tic of ovalis females. The type of attenuatus was stated by Melander 
to have a body length of 28 mm. Handlirsch (1906a) identified 
a specimen in the National Museum of Natural History (no. 38828) 
as attenuatus. He obviously never saw the type of attenuatus; 
his specimen is clearly ovalis, though it appears somewhat smaller 
than usual because it lacks the head and part of the prothorax. 
A second specimen (no. 33827) which Handlirsch (1906a) also 
identified as attenuatus is not even a eucaenid. The venation is 
not preserved, but there is a long, exserted ovipositor, extending 
far beyond the end of the abdomen. As noted above, the oviposi- 
tor in Eucaenus is very short and does not extend beyond the tip 
of the abdomen. 
Eucaenus minor Handlirsch (1911) was based on a fragmen- 
tary specimen (YPM 47) in the Yale University Collection. Hand- 
lirsch considered it a separate species or “at least a variety” of 
