402 



PROCEEDINGS OF THE ACADEMY OF 



^Eschna heros, Fabr. 



" pentacantha, Ramb. 



14 sp. 

 Odoxata (mbellulina). 



Macromia illinoiensis, n. sp. 



" flavipennis, n. sp. 

 Epitheca princeps, Hagen. 

 Cordulia tenebrosa? Say. 



" lateralis Burm. 

 Pantala hymenaea, Say. 

 Tramea lacerata, Hagen. 

 Celithernis eponina, Drury. 



'' elisa, Hagen. 



Plathemis trimaculata, De G. 

 Libellula quadrimaculata, Linn. 



" semifasciata, Burm. 



" luctuosa, Burm. 



" pulchella, Drury. 

 Mesotheniis simplicicollis, Say. 

 Sock Island, Illinois, July 25, 1862. 



Mesothemis corrupta, Hagen. 



" longipennis, Burm. 



Diplax rubicundula, Say. 

 " vicina, Hagen, 

 " semicincta, Say. 

 " ambigua, Ramb. 

 " intacta, Hagen. 

 Peritherais domitia, Drury. 



23 sp. 



Species. New. 



Termitina 1 



Psocina, 13 6 



Perlina, 13 19 



Ephemerina, 26 16 



Agrionina, 16 4 



iEschnina, 14 6 



Libellulina, 23 2 



106 



43 



Remarks on the Species composing the Genus PEDIOCAETES, Baird. 

 BY D. G. ELLIOTT, F. Z. S. 



Iutending, at no distant period, to publish a monograph of the Tetraoninae, 

 I have been led, by the introduction of an apparently new species of this 

 genus (lately described by Dr. George Suckley, under the name of Pedio- 

 caetes Kennicotti, in the Proceedings of the Academy of Natural Sciences of 

 Philadelphia, 1861) to investigate its specific value, and compare it with our 

 common Sharp-tailed Grouse. The following are my conclusions : 



The bird commonly known as Tetrao phasianellus, has heretofore only been 

 found within the limits of the United States, and to this species, Ord, in 

 Guthrie's Geog. 2d American ed., 1815, p. 317, gave the appellation of Pha- 

 sianus Columbianus, basing his description upon the Columbia Pheasant of 

 Lewis & Clark, ii. p. 180. This species then seemed to be the only one of 

 this genus existing in the new world, and as it also appeared to be the one 

 (as far as the knowledge of American ornithologists extended, none of whom 

 had received any examples from without the limits of the Union) to which, 

 long before, Linnseus had given the name of phasianellus, and which Gmelin, 

 Bonaparte, Audubon and all others had retained ; so Prof. Baird, when he 

 instituted the present genus, also gave the same appellation as being the cor- 

 rect one of our well known Sharp-tailed Grouse. 



But in 1861 there arrived at the Smithsonian Institution, from Mr. Kennicott, 

 a number of Sharp-tailed Grouse, collected in the Hudson's Bay Company's 

 Territory, from Fort Rae and Big Island, the prevailing colors of which were 

 black and white, with very little, if any, of the brown hues, which constitute 

 the principal marks of our common bird. 



These examples, Dr. Suckley, after comparison with specimens, obtained 

 from the west and northwest, very naturally considered distinct species, for 

 they certainly are, and thereupon described them as neio, as above mentioned. 



But now I find that this species from Arctic America, is the one originally 

 described as Tetrao phasianellus, the United States species either being con- 

 sidered the " young with ferruginous plumage," vide Richardson in Faun. 

 Bor. Amer., 1831, p. 861, or as a very light colored variety. 



Thus Bonaparte in his continuation of Wilson's Ornithology, gives a figure 

 of a specimen in the Philadelphia Academy, which, as he says, "though a 



[Sept. 



