Jan., '92] ENTOMOLOGICAL NEWS. 23 



As will be seen from the above summary, the largest part of the work 

 deals with the Odonata Anisoptera. This is the only part which the writer 

 is able to discuss, but space forbids more than pointing out these features ; 

 Nymphs representing every genus, excepting Gomphceschna and Micra- 

 thyria, and of 62* out of 80 species occurring in New York are described. 

 New characters are used in many instances to define the various groups. 

 Considerable differences exist between the terminology of the larger 

 groups and the keys here used and those employed in the Illinois bul- 

 letin ; thus, Macromiinaj here apparently corresponds to Synthemiinse 

 there. All these innovations must be studied by comparison with mate- 

 rial from other regions and of other groups. 



Prof. Needham has unquestionably done more for the knowledge of 

 the early stages of the Odonata than any other who has ever paid atten- 

 tion to this subject. May he succeed in a like treatment of the Odonata 

 Zygoptera ! — P. P. Calvert. 



Note on Aradus Niger Stal. — On September 22d, 1901, while col- 

 lecting in the woods about ten miles south of Buflfalo, I came across a 

 little colony of a small black Aradus under the loose bark of a partially 

 rotten log of the white pine. As the species seemed a little different from 

 any Aradus ordinarily found here, I searched the whole log, and took 

 two adults and about half a dozen young in various stages of develop- 

 ment. On reaching home I looked up the identity of my capture, and 

 was surprised to find that the species was Aradus {Quilnus) niger S^isA. 

 This species was described by Stal in the Enumeratio Hemipterorum 

 about twenty-five years ago, and, as I could find no mention of its having 

 been observed by later students, I thought it an interesting capture, and 

 made a few notes for future publication ; but on receipt of the October 

 Entomological News, I saw that Mr. Otto Heidemann had just pub- 

 lished a notice of this insect in the Proceedings of the Entomological 

 .Society of Washington. This paper probably gives all I had intended to 

 say in regard to the species ; so I will merely add the present note, be- 

 lieving it may be of interest as extending the known range of the species 

 well to the north of its recorded habitat. It may be added to the list of 

 Aradidse taken about Buffalo, published in the Bulletin of the Buffalo 

 Society of Natural Sciences, Vol. V, p. 181. — E. P. Van Duzee. 



I have to record the capture of Hydrobius tessellatus Ziegl. at Roberts, 

 Chester Co.. Pa., on June 19, 1901. I secured one specimen in a rapidly 

 running stream. This interesting beetle, rare at all places, has not before 

 been recorded from this region, so far as I know. — J. Chester Bradley. 



* It is but fair to state that 18 of these were previously made known by 

 Hagen and Cabot. 



