OP WASHINGTON. 201 close agreement with only one of them, that of plstica Willis-ton, and the two specimens upon which the latter is based, which are now in the National Museum, agree well with this descrip tion as also with the specimen referred to above as having been bred from Schizoneura lanigcra. Thus the synonymy of pis-tica with radicum is quite certain, and the species should, there fore, be known henceforth as Pipiza radicum Walsh and Riley, which is the older name. The following paper by Mr. Banks was read by title : A LIST OF NEUROPTEROID INSECTS, EXCLUSIVE OF ODO-NATA, FROM THE VICINITY OF WASHINGTON, D. C. By NAJTHAN BANKS. The vicinity of Washington is well suited to many Neuropte-roid insects, but the Trichoptera are not nearly as abundant as in the mountainous regions to the north. The Psocidse are par ticularly numerous here, both in species, and in individuals. This fauna has, of course, not been fully explored, but such a considerable showing is made in the following list that it is thought desirable to publish in the hope of stimulating others to collect in this group. In all, 174 species are recorded, distrib uted as follows: Archiptera 73, Neuroptera 47, Trichoptera 54. The leading family, in point of numbers, is the Psocida3, with 31 species ; two families, the Termitidas and AscalaphidaB, are each represented by but one species. In Virginia a few southern forms are found, and in the Poto mac valley there is a southward extension of many northern species. As a whole, however, the fauna is like that of the east ern coast States. Compared with the Neuropteroid fauna of the arid southwest there are very radical differences. I do not think there are more than a half a dozen species common to this list and the lists of Arizona and New Mexico which I have recently published. The types of the new species are in the author's collection. Order AROHIPTERA. Suborder ISOPTERA. Family TERMITID^. Termes flavipes Kollar. Common throughout the region. There is probably another species with us, but it is not certain which form is the true T. Jlavtpes.