Observations on the Nesting of \u3ci\u3eCrabro Tenuis\u3c/i\u3e (Hymenoptera: Sphecidae)

Three nests of Crabro tenuis were studied during June 1971-1972 in Oswego County, New York. Females constructed shallow but lengthy, multicelled nests in sand with the cells being built in clusters, sometimes in series. Females plugged the entrances with damp sand and occupied the burrows during midday. Paralyzed prey were stored head inward at the end of the burrow. The deeper cells in a cluster were excavated and provisioned first and the shallower cells built and stored later, as determined by the developmental stages of the wasps within the cells. From four to seven paralyzed, adult male flies were placed in a fully provisioned cell with their venters toward the center. Such a cell usually held only one species of fly. Provisions consisted of the suborders Brachycera and Cyclorrhapha and comprised the families Rhagionidae, Anthomyiidae and Tachinidae. An egg was affixed about equally to the left or right side of the neck of a fly and this prey was placed against or near the wall of the cell. The nesting traits of C. tenuis were compared with those of other members of the Cribrarius group, C. advena of the Advena, group, C. venator of the Tumidus group and species in the Hilaris group

Range Extensions for Species of Sphecidae (Hymenoptera) in the Northeastern United States

The ranges of 10 Nearctic species of Sphecidae, Spilomena pusilla, Tachytes parvus, Solierella plenoculoides, Pison agile, Entomognathus lenapeorum, Rhopalum clavipes, Crabro hilaris, C. tenuis, Alysson conicus and Lestiphorus cockerelli, are extended in the northeastern U.S. based upon collections made in Pennsylvania and New York. The first prey record for a North American species of Lestiphorus, cockerelli, is included

Larra bicolor Fabricius (Hymenoptera: Crabronidae): its distribution throughout Florida

We document the presence of Larra bicolor Fabricius (Hymenoptera: Crabronidae) in 46 of Florida's 67 counties. The species is represented by two stocks. The first (released in 1981) originated in Pará, Brazil, but was obtained from Puerto Rico, and became established in Broward County in southern Florida. The second (released in 1988) originated in Santa Cruz de la Sierra, Bolivia, and became established in Alachua County in northern Florida. The Bolivian stock, aided by additional satellite releases from Alachua County, is now widely distributed. The species probably occupies all counties in central and northern Florida, but may yet be absent from some southern counties. Introduction was made for classical biological control of invasive mole crickets

The Use and Legal Significance of the Mean High Water Line in Coastal Boundary Mapping

The effect of unplanned and ill-conceived land use development on the coastal ecology has been well documented in recent years. Recognizing the need for more effective governmental control in this area, a number of state legislatures have enacted statutes to protect the coastal environment and encourage the orderly development of coastal resources. These efforts have received the support of the federal government as well. Determination of coastal boundaries is essential to the development of an effective coastal zone management program. In general such boundaries represent the intersection of the shore with a particular tidal elevation. However, the demarcation of coastal boundaries is complicated by legal uncertainties. Moreover, the unavailability of accurate tidal data or the use of improper survey methods make the accurate location of the physical boundary line a difficult task in many cases. This article will examine a number of physical and legal problems associated with coastal boundary determinations and offer some solutions within the framework of the legislative proposal which accompanies this discussion

The Use and Legal Significance of the Mean High Water Line in Coastal Boundary Mapping

The effect of unplanned and ill-conceived land use development on the coastal ecology has been well documented in recent years. Recognizing the need for more effective governmental control in this area, a number of state legislatures have enacted statutes to protect the coastal environment and encourage the orderly development of coastal resources. These efforts have received the support of the federal government as well. Determination of coastal boundaries is essential to the development of an effective coastal zone management program. In general such boundaries represent the intersection of the shore with a particular tidal elevation. However, the demarcation of coastal boundaries is complicated by legal uncertainties. Moreover, the unavailability of accurate tidal data or the use of improper survey methods make the accurate location of the physical boundary line a difficult task in many cases. This article will examine a number of physical and legal problems associated with coastal boundary determinations and offer some solutions within the framework of the legislative proposal which accompanies this discussion

Administering State Water Resources: The Need for Long-Range Planning

Drastically increased demands upon the nation\u27s water resources are predicted in the coming years as a result of population growth, increased per capita use of water, and the progressive concentration of the population in urban areas. One solution to the water shortage problem is to obtain water from new sources. The boldest and most ambitious proposal is the North American Water and Power Alliance (NAWAPA). This project would result in the damming of various rivers in Alaska and the Canadian Yukon, and transporting the waters of these rivers into a largely man-made five hundred mile long reservoir along the Rocky Mountain Trench. This would involve construction of a series of connecting tunnels, canals, lakes, dams, and lifts. An estimated 70 million to 150 million kilowatts of electric power would also be generated. NAWAPA would provide water to seven provinces of Canada, thirty-three of the United States and to three northern states of Mexico. In all, 110 million acre-feet of water would flow through the system each year with the maximum potential estimated at 250 million acre-feet or about 36 trillion gallons per year. Even if the NAWAPA project is successfully completed, however, additional measures toward more efficient management of water resources must be implemented at all levels of government. This will require a determination of needs and capabilities, and the formulation of long-range plans for the development of all water resources and related land resources within a hydrologic unit. Regulating streams flow, improving water quality, increasing the efficiency of water use, expanding the use of underground storage, and increasing the available water supply by such measures as desalinization, weather modification, and reduction of evaporation losses must be considered in such planning

Determination of biomembrane bending moduli in fully atomistic simulations.

The bilayer bending modulus (Kc) is one of the most important physical constants characterizing lipid membranes, but precisely measuring it is a challenge, both experimentally and computationally. Experimental measurements on chemically identical bilayers often differ depending upon the techniques employed, and robust simulation results have previously been limited to coarse-grained models (at varying levels of resolution). This Communication demonstrates the extraction of Kc from fully atomistic molecular dynamics simulations for three different single-component lipid bilayers (DPPC, DOPC, and DOPE). The results agree quantitatively with experiments that measure thermal shape fluctuations in giant unilamellar vesicles. Lipid tilt, twist, and compression moduli are also reported

Water Quality Control: A Modern Approach to State Regulation

The American public of late has shown increasing concern over the quality of the environment. Water pollution has long been recognized as a major threat to a better environment. Municipal, industrial, and agricultural operations all contribute to the pollution problem. Municipalities empty millions of gallons of inadequately-treated sewage into the nation\u27s rivers and streams. Municipal wastes are almost exclusively organic in nature. Currently municipal wastes are estimated to average about ten million tons annually while industrial pollution averages approximately fifteen million tons. Treatment in general is technologically feasible; the primary impediment is financial inability on the part of municipalities to initiate effective abatement measures. Industrial pollution, both organic and inorganic, involves even greater volumes of effluent than municipal operations. The situation is aggravated by the fact that treatment for inorganic industrial wastes is generally more complex and costly than the processes available for treatment of organic matter. Agriculture contributes to the impairment of water quality through confinement livestock feeding operations and the use of chemical fertilizers, pesticides and herbicides. A Model Water Code has been drafted at the University of Florida in an attempt to provide a vehicle for comprehensive state regulation of water resources. The Code consists of six chapters. The first creates a two-tiered administrative system comprised of a State Water Resources Board and a number of regional water management districts administered by governing boards. This chapter also provides for a comprehensive state water plan while chapter two establishes a permit system for the regulation of consumptive uses of water. Chapter three provides for well construction standards and the licensing of the well drilling industry. Chapter four governs the construction of dams, impoundments and appurtenant works. Chapter five is concerned with water quality. Some of the prominent features of this portion of the Code are a water quality plan and the water quality standards contained therein; construction permits for new outlets, disposal systems and treatment works; discharge permits; and the various enforcement powers available to both the state and local agencies. Chapter six is an optional chapter on weather modification. This article introduces chapter five of the proposed Model Water Code as a basis for a state program of water quality control. Although the authors have designed it as part of an overall scheme for the regulation of water use and quality under a comprehensive state water plan, this chapter can be treated in many respects as a self-contained unit and it is on this basis that chapter five is offered in this form