200 ENTOMOLOGICAL NEWS. [ May, ’12 
Females from various localities show the following sizes: 
LOCALITY LENGTH OF ABDOMEN |LENGTH OF HIND WING 
Extremes Average Extremes Average 
MiGKAS <i Ieieae tne aan 31-34 32.5 26-29 27.5 
WMennesseern - east 31 26 
Indiana ee mea 28.5-33 30.7 24-27 25.6 
Pennsylvania. . +. 30-33 32 25-27 26 
Mayne sid te) 6! 200s 28-31 29.5 25 
Michigancs =. c.c0 eo 215 26 
It is possible that a more intelligent study of larger material 
may reveal that I have included more than one species in the 
above discussion, but for the present I am forced to conclude 
that putrida is a synonym of moesta. In all the material I 
have been unable to detect any differences in male abdominal 
appendages or female mesostigmal laminae. 
Argia intruda n. sp. 
Associated with the dark moesta at Wister, Oklahoma, are 
other Argias which seem to be specifically distinct from moesta, 
and which, after some correspondence with Dr. Calvert on the 
subject, I venture to describe as new. 
Male. Abdomen 33-36, average 34.5, hind wing 25-26, average 25.3. 
Female. Abdomen 33-37, average 33.8, hind wing 26-29, average 27.2. 
Male. Head dull pale brown, rear of head black above, pale brown 
below. 
Thorax pale brown, black as follows: A middorsal thoracic stripe, 
on either side occupying one-half the mesepisternum; a spot on the 
mesepimeron against the humeral suture where it meets the mesinfra- 
episternum, and another above against the first lateral suture just in 
front of (or below) the posterior border; a faint line on humeral 
suture, widened into a small spot above. This is the palest coloration 
represented and is shown by four specimens; in others the two spots 
on the mesepimeron grow towards each other till they form an oblique 
