Miittkoivfski, A Summer's Insect Collecting. 
167 
/Eschna tuberculifera E. Walker. July IG. Oostbiirg-. The Museum 
collection of Acschnse was sent to Prof. E. M. Walker of 
Toronto, who is at present monogTaphing- this genus. The 
data for the present and following- species are given by 
Prof. Walker in a letter. 
/Eschna canadensis E. Walker. Milwaukee, June 14, from woods in 
East Milwaukee and Wauwatosa. Oostburg-, July 4, 1908. 
>Eschna verticalis Hagan. Milwaukee, in woods, June 14. 
>Eschna constricta Say. August. 
/Eschna umbrosa E. Walker. 
Epiaeschna heros Fabr. Oostburg, June 16. 
Epicordulia princeps Hagen. Oostburg, June 15. The first record from 
Wisconsin. 
Sympetrum vicinum Hagen. East Milwaukee, July 24. In woods near 
marsh. 
Sympetrum obtrusum Hagen. July 24 — Sept. in marshy woods. 
This species was very abundant. INIr. Burrill reported a 
night in mid-August on which the species flew in such large 
swarms in the vicinity of Lake Park and Wonderland thut 
it was impossible for people to remain outside. 
Sympetrum rubicundulum Say. Johnson's w^oods, July 26, in marsh. 
Sympetrum sp. A very interesting male obtained from. Fox Lake, 
Fig. 1. Sympclriun sp. Supericr appendage and genitalia. 
Douglas Co., by Mr. H. L. Ward. Apparently it is S. 
costiferum, on comparison of the genitalia, which are nearly 
identical. It differs, however, in the unusual mimber of eight 
denticles inferiorly of the superior appendages, while S. con- 
stiferum is known to have four or five The specimens is still 
in teneral stage, but bears unmistakable indications of the 
markings of a fully developed specimen. The markings 
are identical ^vith those of 8. costiferum, save that the 
tarsi are entirely black, and not only ringed apically on 
the joints. 
