688 



INDEX. 



Page. 

 May, Henry 0. Observations on the Nema- 

 tode genus Nematodirus with descriptions 



of new species 577 



, americana wliitelyi 242 



simplicornis 212 



species 212 



tschudii 242 



McAtee, W. L., and C. P. Alexander. Dip- 

 tera of the superfamily Tipuloidea found in 



the District of Columbia 3So 



Mecistocirrus digitatus 579 



Megalonyx jeffersonii 110 



Melanella monteryensis 2 



Merrill, George P. Notes on the meteorite of 

 EstherviUe, Iowa, with especial reference to 

 its included "Peckhamite" and probable 



metamorphic nature 363 



Mesoleptus peregrinus 258, 262 



Mesostenus sericeus 261 



Metachirus nudicaudatus tschudii 247 



Meteorite of EstherviUe, Iowa 363 



Micropercops darbyi 319 



Microstilba americana 182 



Microtus pennsylvanicus 93, 106 



Microxus mimus 239, 240 



torques 239 



Micrurus heterozonus 619 



Mineral collections of the United States Na- 

 tional Museum, recent accessions to the . . . 303 

 Minerals from the old Tungsten mine at Long 



Hill in Trumbull, Conn 469 



Minerals, the Hydrotalcite group of, and the 



chemical composition of Hydrotalcite 147 



Minous mouodactylus 317 



Modiolus fornicatus 1 



Mollusks of the families RissoelUdae and Syn- 



ceratidae, and the Rissoid genus Barleeia. . 159 

 Mollusks, operculate land, of the family 



Annulariidae 49 



Molophilus hirtipennis 420 



nova-caesariensis 420 



pubipennis 420 



ursinus 420 



Molossus obscurus 222 



Mopalia ciUata 4 



hindsi 5 



lignosa 4 



species 5 



Mas musculus 226 



Musebeck, C. F. W. A revision of the North 

 American species of Ichneumon-flies be- 

 longing to the genus Apan teles 483 



Mustela aureocentris 224 



Mycetobia persicae 390 



Mylohyus cumerlandensis 102 



exortivus 98 



nasutus 90, 98 



obtusidens 100 



Mylolcuciscus atripinnis 313 



Myotis nigricans 222 



My tilus californianus 1 



Nasonia brevicornis 214 



Natica clausa 5 



National Geographic Society, amphibians 

 and reptiles from southern Peru collected 

 by the Peruvian Expedition of 1914-1915 



Page, 

 under the auspices of Yale University and 



the 609 



National Geographic Society and Yale Uni- 

 versity, mammalia collected by Mr. Ed- 

 mund Heller during the Peruvian Expedi- 

 tion of 1915, under the auspices of 217 



Naumannite, B oulangerite, Bismutoplagionite 

 and a silver-bearing variety of Jamesonite. . 589 



Neacomys spinosus 229 



Nectomys garleppi 227 



Nematodirus, observations on the Nematode 

 genus, with descriptions of 



new species 577 



abnormaUs 581 



dromedarii 583,586 



filicolUs 579,580 



furcatus 582 



helvetianus 581,583,586 



mauritanicus 582,586 



neotoma 582,585,586 



roscidus 580, 586 



spathiger 580 



Keomphaloidella fumipennis 199 



ixtilxochitU 199 



Neopristimerus appalachianus 280 



Neorileya flavipes 208 



(Neotheronia) Epimecoideus auratus 44 



micans 44 



Neotheronia septemtrionalis 45 



winnamanae 44 



Neotoma magister 93, 106 



pennsylvanica 93,106 



Nephrops aequus 382 



maoensis 381 



Nephrotoma calinota 396 



conifera 396 



eucera 396 



ferruginea 397 



festina 397 



incurva 397 



macrocera 397 



occipitaUs 397 



polymera 397 



punctum 397 



sodalis 397 



tenuis 397 



virescens 397 



xanthrostigma 398 



Nereis, a new polychaetous annelid of the 



genus, from Brazil 467 



Nereis brevicirrata 467 



Nerita labeo 53, 77 



Noble, G. K., and Thomas Barbour. Am- 

 phibians and reptiles from southern Peru 

 collected by the Peruvian Expedition of 

 1914-1915 under the auspices of Yale Uni- 

 versity and the National Geographic So- 

 ciety 009 



Octopus gracilis 300 



Odocoileus peruvianus 242 



viginianus 90, 103, 104, 124 



Odostomia angularis 3 



(Chrysallida) euglypta 2 



deliciosa 3 



(Evalea) edmondi 3 



skidegatensis * 



