New genera and species of Lygaeoidea (Heteroptera: Lygaeoidea: Rhyparochromidae)

Afralampes capensis is described as a new genus and species in the Megalonotini. The systematic position of Serranegra Lindberg is discussed, a new species is described from South Africa and a key to species included. A new species of Diniella Bergroth is described from South Africa and a key to the African species included. A new species of Polycrates Stal is described from South Africa. The immature stages of Polycrates consutus (Germar) are described with notes on its distribution and biology. The first records of the occurrence of species of Lampropunctus Scudder and Lamproceps Reuter from South Africa are included. Wing polymorphism is discussed. Lispolophus Bergroth is reduced to junior synonymy with Diniella. Diniella nitens (Wagner) is reduced to a junior synonym of Diniella laevicollis

Corrigenda to and validation of Ozophora woodruffi Slater 2005 (Hemiptera: Lygaeidae)

Important missing specimen data are provided for the original description of Ozophora woodruffi Slater (2005: 245) (Hemiptera: Lygaeidae), along with additional comparative relationships. Because of the missing type information, according to ICZN rules (1999), the species became a nomen nudum. This paper now serves to validate the name, and authorship becomes Slater (2012)

Notes and New Records of Iowa Henliptera (Heteroptera)

A single specimen of Banasa euchlora was listed for Iowa by Osborn (1892) without definite locality. Stoner ( 1920), in the only definitive work on the Iowa Pentatomoidea, lists the species as known within the state boundaries only by the early Osborn record. The species has remained known from Iowa only by this early record to the present time. The writer is now able to confirm the presence of this species as a part of the Iowa fauna. A specimen in the Iowa State College insect collection bears the label, Shenandoah, Iowa, July 15, 1931, REG. Recently a second specimen, taken at Ames, August 2, 1947 has been received through the kindness of the collector Mr. J. L. Laffoon. This specimen is deposited in the personal collection of the author

Bedrock rivers are steep but not narrow: hydrological and lithological controls on river geometry across the USA

Bedrock rivers are commonly expected to have steeper and narrower channels than alluvial rivers. However, understanding of bedrock river characteristics has largely been based on small samples of sites in specific climates and upland locations. We provide the first systematic assessment of bedrock and alluvial river channel characteristics for 1274 sites across a broad climatic gradient. We assess whether the width, width-to-depth ratio, and slope of bedrock channels differ from those of alluvial channels and the extent to which these differences are correlated with drainage area, mean annual flow (QMAF), grain size, and lithology. We find that bedrock channels occur at all drainage areas. For the same drainage area, bedrock channels are wider and steeper than alluvial channels. They also have a higher mean annual precipitation and hence QMAF, which likely causes the increased width. After accounting for differences in QMAF, both bedrock and alluvial channels have similar hydraulic scaling. Lithology affects both types of channels in a similar way, with channels on sedimentary lithologies being wider and less steep compared to those on igneous-metamorphic lithologies. Overall, our findings raise new questions about the evolution of bedrock river channels and pave the way for more accurate landscape evolution modeling

The Immature Stages of American Pachygronthinae (Hemiptera: Lygaeidae)

The subfamily Pachygronthinae contains two genera within the limits of the United States, each with two well established species. Little is known of the life history of any species and none of the immature stages has been adequately described in the literature. This paper discusses three species: Phlegyas abbreviatus (Uhler), Oedancala dorsalis (Say), and Oedancala crassimana (Fabricius). The paper includes descriptions of all available immature stages with keys to the genera and species and means of separating the various instars within the species

An Annotated List of the Lygaeidae of Iowa and Illinois (Hemiptera: Heteroptera)

In this paper an attempt has been made to present an adequate list of Lygaeidae found in Iowa and Illinois, and to indicate what is known of the intrastate distributions of the various species. This paper is limited to geographic considerations and, in this sense, assumes the character of a local list \u27 as no biological or ecological considerations are discussed. It is felt that our knowledge of the Nearctic Lygaeidae has reached a degree of maturity where knowledge of state and lesser faunal areas is essential to encourage the badly needed bionomic work that should develop with a relatively stable and mature taxonomy. The author hopes in the future to supplement this distributional study by contributions dealing with bionomic aspects of the various species of the family. It is also hoped that this list will encourage local collectors to fill the gaps still present in our knowledge and also be of aid to ecologists, students of animal distribution and those contemplating faunal listings of other areas

Discrete atherosclerotic coronary artery aneurysms: A study of 20 patients

The incidence, angiographic features and natural history of discrete atherosclerotic coronary aneurysms were evaluated in 20 patients with 22 aneurysms (0.2% of 8,422 patients referred for coronary angiography). Fifteen aneurysms (68%) were in the left anterior descending, four (18%) in the circumflex, two (9%) in the right and one (5%) in the left main coronary artery. Aneurysm diameter ranged from 4 to 35 mm (mean 8); 95% of aneurysms were adjacent to a severe obstruction.Seventy-five percent of patients had severe triple vessel disease that included severe left main disease in 15%. Total obstruction of one or two arteries was present in 75%. In patients with wall motion abnormalities, 78% of the abnormalities were in the distribution of the aneurysm. Follow-up (range 1 to 90 months [mean 30]) was obtained in all 20 patients. There were two cardiac and two noncardiac deaths; 12 patients had coronary bypass surgery and of 16 survivors, 13 were angina-free.In conclusion, discrete coronary aneurysms are much less common than diffuse ectasia. Unlike ectasia, they are never found in arteries without severe stenosis, and are most common in the left anterior descending coronary artery. Associated coronary artery disease is more severe in patients with discrete aneurysms than in those with diffuse ectasia. Discrete coronary aneurysms do not appear to rupture, and their resection is not warranted

Price Discovery and the Accuracy of Consolidated Data Feeds in the U.S. Equity Markets

Both the scientific community and the popular press have paid much attention to the speed of the Securities Information Processor, the data feed consolidating all trades and quotes across the US stock market. Rather than the speed of the Securities Information Processor, or SIP, we focus here on its accuracy. Relying on Trade and Quote data, we provide various measures of SIP latency relative to high-speed data feeds between exchanges, known as direct feeds. We use first differences to highlight not only the divergence between the direct feeds and the SIP, but also the fundamental inaccuracy of the SIP. We find that as many as 60 percent or more of trades are reported out of sequence for stocks with high trade volume, therefore skewing simple measures such as returns. While not yet definitive, this analysis supports our preliminary conclusion that the underlying infrastructure of the SIP is currently unable to keep pace with the trading activity in today's stock market.Comment: 18 pages, 20 figures, 2 table