Drumming is first described for five North American stonefly species, Acroneuria evoluta, Doroneuria baumanni, Isoperla namata, Chernokrilus misnomus, and Pictetiella expansa. Signals of Acroneuria lycorias, Phasganophora capitata and Isoperla signata are further described. Drumming was not recorded from Amhinemura delosa. Signals of A. evoluta are the most complex yet recorded in Plecoptera. Doroneuria baumanni, P. expanse, C. misnomus and P. capitata have 2-way exchanges. Male D. baumanni produce two prolonged beats by rubbing the hammer on the substratum; male-female signals are non-overlapping in the first two species and overlapping in the latter two. Female P. capitata answered with an unusually long sequence of beats. Two male Isoperla species produced monophasic calls without female answers. Female A. lycorias answered taped male signals with monophasic signals like all observed females.

From purpose and scope: The purpose of this report is to compare and evaluate four methods of estimating flood-frequency skew coefficients for Michigan. These methods are based on use of (1) the generalized skew map of the United States, (2) maps showing lines of equal mean skew of Michigan, (3) mean regional station skews, and (4) skew-prediction equations.

From introduction: The U.S. Geological Survey, at the request of the U.S. Air Force, began an investigation of geologic and hydrologic conditions at Wurtsmith Air Force Base in September 1979. The investigation was prompted by the discovery that an underground storage tank containing trichloroethylene (TCE) had leaked, contaminating Base water-supply wells. Subsequent information suggested that the trichloroethylene had moved off-Base.

Video recording from The Black Academy of Arts and Letters recorded during the televised broadcast of the music documentary program "Motown 25: Yesterday, Today, Forever" produced by Suzanne de Passe for Motown Records, to commemorate Motown's 25th year. The 1983 program was taped before a live audience in Pasadena, California on March 25, 1983 and broadcast on NBC May 16th. The tape shows the performance of black celebrity musicians.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "George Ihler"

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "George Ihler"

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "General Motors Chairman Roger Smith, left, and F. James McDonald show off the lcay and wood model of Project Saturn, a subcompact car that the No. 1 automaker will introduc in late 1980's"

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Dodge Trucks, have a new, five-year of 100,000 mile outer body warranty on 1984 conventional pickup and sport utility Ram-charger models."