Field Recognition of Adult \u3ci\u3eAcentrella\u3c/i\u3e and \u3ci\u3eHeterocloeon\u3c/i\u3e (Ephemeroptera: Baetidae)

The highly developed anterior process of the mesothorax, is described as a useful field character for identifying adults of Acentrella and Heterocloeon in the Nearctic. This presumed adult synapomorphy suggests a sister relation- ship of the two genera

Differential Shoot Feeding by Adult \u3ci\u3eTomicus Piniperda\u3c/i\u3e (Coleoptera: Scolytidae) in Mixed Stands of Native and Introduced Pines in Indiana.

The larger pine shoot beetle Tomicus piniperda, a native bark beetle of Europe and Asia, was found in North American Christmas tree plantations in 1992 in Ohio. Subsequent surveys found it in six U.S. states and in one Canadian province. The first natural area where Tomicus was found to be established was at the Indiana Dunes State Park, in northwestern Indiana near the Lake Michigan shoreline. Pine stands were surveyed for fallen shoots to determine the extent and range of shoot feeding in the park. Within the study area adult Tomicus fed on the shoots of all native pines (Pinus banksiana, P. resinosa. and P. strobus.), as well as the European species (P. sylvestris). More fallen shoots were collected from both P. resinosa and P. sylvestris than expected from their basal areas in the sampled stands. This contrasted with P. banksiana and P. strobus whose shoots were underrepresented relative to their basal areas. The relatively high numbers of fallen shoots found for P. resinosa suggests that red pines in the Great Lakes region will easily support populations of T. piniperda

Design of the materials experiment carrier for on-orbit servicing

This paper discussed the MEC system and its mission from the viewpoint of orbit servicing. Information is provided on MEC system requirements, design for on orbit servicing, on orbit servicing operations and rationale and servicing costs

Barbaetis: A New Genus of Eastern Nearctic Mayflies (Ephemeroptera: Baetidae)

The new genus Barbaetis Waltz and McCafferty, and new species Barbaetis benfieldi Kennedy are described from larvae collected from the New River, Virginia. Barbaetis is easily told from Baetis by the presence of procoxal osmobranchia. Cladistics of B. benfieldi, related Pseudocloeon species, and the lutheri and pavidus complexes of Baetis are presented and indicate the need for further taxonomic revision. The habitat of B. benfieldi is described in terms of several ecological parameters. The new species demonstrates a univoltine life history with postembryonic development restricted to a short springtime period

Gleaning on Coreidae (Heteroptera) by \u3ci\u3eTachopteryx Thoreyi\u3c/i\u3e (Odonata: Petaluridae)

(excerpt) Tachopteryx thoreyi (Hagen in Selys) is an uncommon or rare, fen and seep dwelling dragonfly noted for its large size, restricted habitat requirements, and characteristic habit of perching on tree trunks

The depositional environment of the kisbey sandstone from the madison group (Mississippian), North-Central North Dakota

The Kisbey Sandstone, also known as the K-2 marker, was studied to understand its depositional environment. It occurs within the Madison Group (Mississippian) of North Dakota. The Madison Group is a regressive, near-shore sequence. In descending order, this Group comprises the Charles, Mission Canyon, and Lodgepole Formations. The K-2 marker appears as well-log defined unit between the Charles and Mission Canyon Formations. Seven counties comprise the 7100 square mile study area. They include Rolette, Bottineau, Renville, McHenry, Ward, Burke, Mountrail Counties, and the southern most adjacent townships in Canada. For this study, 1677 well-logs were examined. These data were analyzed through stratigraphic cross-sections, structure contour maps, and isopach maps. Two lateral, one longitudinal, and a diagonal cross-section were made. Structure contour maps and isopach maps were made of marker beds within the Madison Group. The cross-sections and maps were examined for paleogeomorphic features that would indicate a particular depositional environment. In addition, 667 feet of drill core were examined for sediment characteristics, sediment structures, fossils, and stratigraphic variability. These data were used to construct a depositional model for the Kisbey Sandstone. Both well-logs and drill core are kept in the Wilson M. Laird Core Library in Grand Forks, North Dakota. Possible paleogeomorphic features were found on the isopachmaps, structure contour maps, and stratigraphic cross sections. Unfortunately, these features are not in areas where core is available, and cannot be tied to core data. The core reveals that the K-2 marker also contains anhydrite, sandy anhydrite, silty anhydrite, clayey anhydrite, and packstone. Generally, the sandstone is very fine- to fined grained, angular, and predominantly quartz. Sandstone characteristics can be distinguished in three geographic areas. The first area lies between R. 80 w. to R. 82 W. in the north-central North Dakota. Here, the sandstone is primarily cemented by anhydrite. The second area is an extension of the first area into Saskatchewan. Sandstone in the second area is cemented by both anhydrite and calcite. The third locality is the Sohio-Walsh well in T. 162 N., R. It is an unusually thick sandstone that is cemented by calcite. Two localities reveal some faint horizontal bedding, otherwise the sandstone is massive. Macrofossils were also sparse. Solitary corals, algae, brachiopods were found in isolated cases. Evidence of burrowing is also present in core. The K-2 marker is overlain by anhydrite, packstones of the Mohall beds, and underlain by packstones of the Glenburn beds. The linear profile of the cross-section indicate that the Kisbey Sandstone was deposited on a broad flat plain. The high percentage of quartz grains, the burrowing, the presence of anhydrite, all indicate that the Kisbey Sandstone was deposited in a swash zone. The sand could have been either transported by eolian processes or by tidal processes resulting from storms. In addition, the name Kisbey Sandstone should be used only when core is present. The K-2 marker is a better term for this unit when data comes from well-logs

Summary: Remote sensing soil moisture research

During the 1969 and 1970 growing seasons research was conducted to investigate the relationship between remote sensing imagery and soil moisture. The research was accomplished under two completely different conditions: (1) cultivated cropland in east central South Dakota, and (2) rangeland in western South Dakota. Aerial and ground truth data are being studied and correlated in order to evaluate the moisture supply and water use. Results show that remote sensing is a feasible method for monitoring soil moisture

\u3ci\u3eCallibaetis Pretiosus\u3c/i\u3e (Ephemeroptera: Baetidae) From Pennsylvania: New Distribution Record

Larvae of Callibaetis pretiosus were collected from a wet-weather pool in Monroe County, Pennsylvania. This record represents a significant northward increase in the known distribution of this species which had previously been reported only from Alabama, Florida, Georgia, North CarolIna, Tennessee, Texas, and Virginia

New Synonomy in \u3ci\u3eHypogastrura\u3c/i\u3e (Collembola: Hypogastruridae)

(excerpt) In the course of faunistic studies of Indiana Collembola, seasonal occurrences of the two species Hypogastrura packardi (Folsom), 1902 and H. notha (MacNamara), 1922 were found to exhibit seasonal dimorphism and population dynamics similar to those patterns observed in cyclomorphic species previously reported in literature (Leinaas 1981 a,b)