A new species of Peckia (Diptera: Sarcophagidae) from Costa Rica : with a note on P. pexata (Wulp)

A new species of Peckia Robineau-Desvoidy is described from the coastal dry forest of Guanacaste Province, Costa Rica, viz., Pechia glyphis sp.n., and a key to the ten species of Peckia known from the area is provided. A lectotype is designated for Pechia pexata (Wulp, 1895) and intraspecific variation in male leg setosity and in the morphology of male terminalia are documented

A Counterexample to a Conjecture about Positive Scalar Curvature

Conjecture 1 of Stanley Chang: "Positive scalar curvature of totally nonspin manifolds" asserts that a closed smooth manifold M with non-spin universal covering admits a metric of positive scalar curvature if and only if a certain homological condition is satisfied. We present a counterexample to this conjecture, based on the counterexample to the unstable Gromov-Lawson-Rosenberg conjecture given in Schick: "A counterexample to the (unstable) Gromov-Lawson-Rosenberg conjecture".Comment: v1: 4 pages, AMS-LaTeX; v2: small changes in presentation, typos corrected, v3: comment added, to appear in Proc AM

A new species of Boettcheria from Guatemala (Diptera: Sarcophagidae)

Boettcheria styx new species is described from Guatemala, and a key is provided to separate it from B. maerens (Townsend). A list is given of Central American species of Boettcheria with references to figures of their genitalia

A new ventrops (Diptera: Rhinophoridae) from Ethiopia

A new species of the Afrotropical endemic rhinophorid genus Ventrops is described, illustrated and compared with congeners

The Sarcophagidae (Diptera) described by C. De Geer, J. H. S. Siebke, and O. Ringdahl

All species-group taxa described by or assigned to C. De Geer, J.H.S. Siebke, and O. Ringdahl are revised. Musca vivipara minor De Geer, 1776 and Musca vivipara major De Geer, 1776 are considered binary and outside nomenclature. The single species-group name ascribed to Siebke is shown to be unavailable. A lectotype of Sarcophaga verticina Ringdahl, 1945 [ = S. pleskei (Rohdendorf, 1937)] is designated and Brachicoma borealis Ringdahl, 1932 is revised and resurrected as a distinct species

Egg morphology of Mydaea lateritia (Rondani, 1866) (Diptera: Muscidae)

Several specimens of Mydaea lateritia (Rondani, 1866) were collected during studies of arthropod succession on pig carrions in western Poland. This is the first record of this species in Poland and the northernmost occurrence of the species. Scanning electron microscopy documentation of egg morphology of M. lateritia is presented for the first time. Hexagonal chorionic network, foliate hatching pleats, short lateral respiratory horns, dorsomedian flange and median area with smooth hexagonal network and craters are described. The egg could be classified as Mydaea-type with short respiratory horns

A new species of \u3ci\u3ePeckia\u3c/i\u3e (Diptera: Sarcophagidae) from Costa Rica, with a note on \u3ci\u3eP. pexata\u3c/i\u3e (Wulp)

A new species of Peckia Robineau-Desvoidy is described from the coastal dry forest of Guanacaste Province, Costa Rica, viz., Peckia glyphis sp.n., and a key to the ten species of Peckia known from the area is provided. A lectotype is designated for Peckia pexata (Wulp, 1895) and intraspecific variation in male leg setosity and in the morphology of male terminalia are documented