OF WASHINGTON. 133 for investigating the subject of introduction of insects was Messrs. LeConte, Horn, and Riley at Philadelphia in 1876. Many things of interest were found in packing-straw used by the various exhibitors. Dr. Ashmead reported that a peculiar sawfly belonging apparently to the genus Cimbex was recently bred from an orchid received at London from Ceylon. Mr. Marlatt spoke a few minutes on his recent trip to Cuba, Florida, and Porto Rico. He said that the value to one study-ing the insects injuring any group of plants, by a trip through the region where those plants are cultivated, can scarcely be estimated. The following papers by members of the Society have been accepted by the Publication Committee during the summer: DESCRIPTIONS OF SOME NEW MITES. BY NATHAN BANKS. In my "Treatise on the Acarina or Mites/' 1 several mites, mostly of genera previously unknown in this country, were referred to, and figures were given of them. I had not then the time for their descriptions, and these are now furnished, together with those of a few other interesting forms that have recently come to my attention. References are given to those figured in the "Treatise." One new genus and twenty new species are added to the fauna of the United States. Neophyllobius americanus n. sp. Pale yellowish, body about once and one-third longer than wide. Legs large and long, and arranged in a radiate manner, the creature look-ing like a minute Phalangid, since leg iv is about as near to tip of body as leg i is to front of body. Above with a submedian row of six stout, simple bristles, and from anterior margin to humeral region an irregular submarginal row of six bristles; two more bristles each side at tip. Legs very long and slender as is usual in the genus. When seen under high power they are minutely, transversely annulate. The tarsal joint is distinctly swollen before the middle. All legs with a few long stout bristles, one from the patellar joint is especially long and prominent; no clavate bristles on tarsi or elsewhere. Last joint of palpus reclinate, much smaller than other joints and slender, with two long bristles near base and about 1 Proc. U. S. Nat. Mus., xxvm, No. 1382, pp. 1-114, 1904.