TABLE OF CONTENTS 



Article 



Aldrich, J. M. American two-winged flies of the genus 

 Microphthalma Macquart, with notes on related 



forms. No. 2639, pp. 1-8. October 15, 1926 ' 13 



New species: Microphthalma ruficeps, M. virens. 



. Descriptions of new and little known diptera 



or two-winged flies. No. 2648, pp. 1-26. December 27, 



1926 ^ 22 



New genera: Microsimiis, Synoris, Ursophyto, Meledonus, Micro- 

 sillus, Simoma, Eucomus, PsUoneura. 



New species: Ocnaea fiavipes, Microsimiis luteus, Hydrotaea dissi- 

 milis, H. abdominalis, Mesemhri/na tristis, Metallea illingworthi, 

 M. rodusta, M. nigribarha, Wohlfahrtia atra, Xiphomyia auriceps, 

 Synoris coquilletti, Ursophyto rtifigeiia, Meledonus latipennis, 

 Lixophaga orhitalis, L. jennei, Peteina hyperdiscalis, Simoma 

 grahami, Eucomus strictus, Psiloneura flav-isquama-, Lypha maculi- 

 pennis, Cuphocera aurea. 



Bartsch, Paul. Additional new mollusks from Santa Elena 



Bay, Ecuador. No. 2646, pp. 1-20. December 16, 1926 ^— 20 



New sipecies: Pyramidella (Pharcidella) ava, P. {Triptychus) 

 olssoni, P. (Syrnola) collea, Turbonilla iChemnitsia) rimaca, 

 T. (Strioturbonilla) hua, T. (8.) ata, T. (8.) caca, T. (8.) capa, 

 T. (Pyrgiscus) tia, T. (P.) intia, T. (P.) collea, T. (P.) ay a, T. 

 (P.) mara, T. (P.) rimo, T. (Mormula) inca, T. (Asmunda) 

 churia, Odostomia {Chrysallida) quilla, O. (C.) vira, O. (C.) 

 ata, O. (G.) collea, O. (C) pacha, 0. (C.) capa, 0. {PyrguUna) 

 mora, Melanella (Balds) capa, M. (B.) tia, 8tromUformis hua, 

 8. inca, 8. salsa, 8. paria. 



Bassler, Kay S. {See Ferdinand Canu) 14 



Canu, Ferdinand, and Ray S. Bassler. Classification of the 

 Cheilostomatous Byrozoa. No. 2640, pp. 1-42. April 9, 



1927 1 14 



New families : Hincksinidae, Alderinidae, Beaniidae, Mamilloporidae. 



New genera: Tretosina, Aplousina, Exechonella, Cryptostomaria, 

 8tomhypselosaria, Mesostomaria, Omoiosia, Petraliella, Coleopora, 

 Cosdmopsis, 8tenopsis, Cigclisula, Ragionula, Diatosula, Gemelli- 

 poridra, Hippopleurifera, Buffonellaria, Triporula, Psilopsella, 

 Hippoporidra, Hippotrema, Cornuticella, Anoteropora, 8tenosv- 

 pora, Trochosodon Actisecos, Catadysis. 



New names : Cellarinidra, Erinella, CribricelUna, Orthoporidra. 



New suborder : Hexapogona. 



*Date of publication. 



48684—27 2 V 



