THE CANADIAN ENTOMOLOGIST. 289 



figure is evidently inaccurate, and the si:)ecies is very surely X. fasciatum 



with dorsal infuscation, a common variation. 0. conciiuuim, Scudd., is 



catalogued as a distinct species. In view of the fact that Mr. Kirby 



seems to have possessed neither this species nor Iierbacemii^ of which 



Scudder considers concinmim a synonym. I prefer to leave the former in 



synonymy under the latter. Nigripes, Scudd., is replaced by the earlier 



name validuvi of Walker. Brtineri, Blatchley, is listed as distinct, 



though the describer has pronounced it a synonym of voUmium, McNeill, 



after direct comparison of types of both species. f Sphagnorum, Walk., 



described as a Dediais, and since omitted from American lists, is recorded. 



It will very certainly preoccupy some one of our later described species. 



Xiphidion, Serv. — This well-known generic name, like ConicephaliiSy 



Thunberg, is in the synonymy under Anisoptera, Latr. The sj^ecies 



]jiaced here are those usually clas'^ed under Xiphidion. Cpiereus, 



Thunb., is removed from the synonymy under fasciatum, though no 



specimens of it seem to have been before the cataloguer. There may, 



however, be good reasons for this action. As stated above, ^r^rr//^, Harr., 



is listed as distinct. Phancroptei-a coloradensis, Glover, 111. N. A. Ent., 



Orth., pi. xi, fig. 12 {1872), is omitted from the Catalogue. It is a 

 synonym oi fasciatji7n. 



Engoniaspis, Scudd. — This genus, as shown in my revision of the 

 Decticina?;, p. 320, is a synon\m oi Ailantietis. I accredit it to Scudder, 

 as I maintain that a generic name can not stand without a species being 

 cited under it. The first species mentioned under the generic name 

 Eiigoniaopis is testacea, Scudd., which is a synonym of Atlanticus 

 pachymerus, Burm. 



x\tlanticus, Scudd. — The Decticus derogaUis of Walker is quoted as a 

 synonym of ^. dorsalis instead oi A. paxhymeriis, as is usually the case. 

 The description of Walker gives no aid in the matter, but the locality, 

 Massachusetts, would indicate its being pachymenis. Kirby had speci- 

 mens o'i dor sails, but none oi pachymerus, and when he has specimens of 

 the latter for examination his views on this point of synonymy may 

 change. 



tThe Orth. of Ind., p. 390, 391 (1903). 



+Proc. U. S. Xat. Museum, xxxii, pp. 285-410 (1907J. 



