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October, 1Q13 Bulletin of the Brooklyn Entomological Society 95 



triangles of the fore or hind wings. The illustration by Emmons is 

 incorrect so far as it relates to the type we have." 



From the above observations on the wing venation of Untneri 

 and from the accompanying plate it will be seen that it does not 

 belong to the genus Dorocordulia its last resting place, which has 

 \^eins M4 and Cul approximated near the margin of the fore wing. 

 Reference to Mr. Williamson's paper "A New Dragonfly belong- 

 ing to the Cordulinae and a Revision of the Classification of the Sub- 

 family," Entomological News, XIX, p. 428, 1908, places Untneri 

 in his second group on the majority of its characters and near the 

 North American genera Neurocordulia and Platycordulia. It has 

 been called a troublesome species, and probably the best thing 

 to do is to make a new genus for it. I would propose the name 

 Williamsonia, after Mr. Edward Bruce Williamson of BlufEton, 

 Indiana, the well-known student of dragonflies, with Untneri as 

 type of the genus. The table of North American genera may 

 be reconstructed in part as follows: 



a. Vein M4 and Cul in the fore wing a little divergent apically, 

 the number of rows of cells between them increasing toward the 

 margin of the wing. 



h. Triangles and subtriangles of fore wing with cross veins. 

 Hind wing with sub triangle. Two or more cubito-anal 

 cross veins in both front and hind wings. 

 c. Hind wings broad with two rows of cells between anal 



loop and margin of wing Platycordulia. 



Hind wings broad with one row of cells between anal 



loop and margin of wing Neurocordulia. 



bb. Triangles and subtriangles of fore wing without cross 

 veins. Hind wing without subtriangle. One cubito-anal 

 cross vein in both front and hind wings. Wings unspotted 



expect at extreme base Williamsonia. 



Following these genera would then come those having veins M4 

 and Cul in the fore wing approximated toward the margin of the 

 wing. 



Dr. Hagen in Pysche in the article above referred to states that 

 two females of Untneri were collected at Saskatchewan, Lake 

 Winnipeg, in 1860 by Robert Kennicott; that eight specimens, 

 four males and four females were collected by Dr. Lintner on 

 May 27, at Center near Albany, N. Y., and he adds that " It is very 



