VI CONTENTS. [Vol. 38 



Page. 



Crop pest controls, Sanders 558 



When does the cost of spraying truck crops become prohibitive? Safro 558 



A device for sowing grasshopper poison, Parks 558 



A suggestion for the destruction of cockroaches, Howard 558 



Experiments on the physiology of digestion in Blattidse, Sanford 558 



Sex determination in Anthothrips verbasci, Slmll 558 



Key to the species of Leptoglossua occiu-ring north of Mexico, Gibson 559 



Possibility of transmission of plague by bedbugs, Cornwall and Kesava Menon . . 559 



The hop redbug (Paracalocoris hawleyi), Hawley 559 



A contribution to the knowledge of the biology of Tingis pyri, Durante 559 



A few notes chiefly on the names of nearctic Tingidse, McAtee 559 



Key to the nearctic species of Leptoypha and Leptostjda, McAtee 559 



AmpMscepa bivittala in its relation to cranberr^^ Scammell 559 



The family Isometopidse as represented in North America, Gibson 560 



A key to the species of Dictyophara, Gibson 560 



The pear woolly aphis, Davidson 560 



The box elder aphid {Chaitophorus negundinis) , Webster 560 



Aphis immunity of teosinte-corn hybrids, Gernert 561 



Chermesidse in relation to British forestry, Steven 561 



The fluted scale (Icerya purchasi), Speyer 561 



Jcerya purchasi in Ceylon: A warning to India, Fletcher 561 



Studies on eggs of Aphis avenie, A. pomi, and A. sorbi, Peterson 561 



Some Florida scale insects, Wilson 562 



Control of scale insects or Coccidse in Florida, Berger 562 



Ocneria dispar in Britain, Adkin 562 



Life history of the okra or mallovv caterpillar (Cosmophila erosa), Dozier 562 



The pink boUworm in Brazil, Green 562 



Note on the life cycle of the sugar beet webworm. Marsh 562 



The Indian meal moth, Plodia interpunctella, in candy, Herms 562 



A demonstration in mosquito control, Howard 562 



A trematode parasite of anopheline mosquitoes, Sinton 562 



Asphondylia loebsteri n. sp., Felt 563 



Hypoderma lineata in Netherlands, Baudot 563 



Effect of certain chemicals on oviposition in house fly, Crumb and Lyon 563 



Studies in flies. — Classification of the genus Musca, Awati 563 



Carriage of cysts of Entamceba histolytica by flies, Wenyon and O'Connor 563 



A new nematode, Aproctonema entomophagum n. g. and n. sp., Keilin 563 



What determines the dm-ation of life in Metazoa? Loeb and Northrop 563 



Carabidee injurious to fruit trees, Lesne 564 



The phylogeny of the Elateridie based on larval characters, Hyslop 564 



Sweet potato root weevil (Cylasformicarius), Newell 564 



Shot-hole borer of tea [Xyleborus fornicatus], Speyer 564 



Biology of the Tephrosia weevil, van der Goot 564 



Toxicity of molds to the honeybee and the cause of bee paralysis, Turesson 564 



The wintering of bees in Ontario, Pettit 564 



Money in bees in Australasia, Tarlton-P»ayment 564 



Notes on Bombidse and on the Life history of Bomhus auncovnus, Prison 564 



Occurrence of a fungus-growing ant in Louisiana, Jones 564 



A contribution to the Platygasterinse and their Life liistory, Kieffer 565 



[New Ichneumonoidea], Girault 565 



Chalcididse of the wild fig tree in India, Ceylon, and Java, Grandi 565 



New chalcid flies, with notes, Girault 565 



Eight new species of reared ichneumon flies, Cushman 565 



Three new chalcid flies from North America, Girault 565 



Wolfiella niforum n. g. and n. sp., a parasite of Lophynis rufus, Krausse 566 



New parasite cages, Pemberton and Willard 566 



The biology of Ccelinidea meromyzie, Kelly 566 



Latrodectus mactans and Gliptocranium gasteracanthoides in Peru, Escomel 566 



New tick records for Minnesota, Howard 566 



FOODS — HUMAN NUTRITION. 



Nutrition investigations upon cottonseed meal. III, Richardson and Green 566 



How to grow the cowpea and forty ways of preparing it, Carver 567 



The uses of the peanut on the home table, Rich 567 



The biological efficiency of potato nitrogen, Rose and Cooper 567 



Burned grain or flour 567 



