CONTENTS. V 



Page. 



The powdery mildews — Erysiphaceae, Reed 537 



Ramularia, Mycosphserella, Ncctria, and Calonectria, Wollenweber 537 



Notes on cultures of three species of Peridermium, Hedpcock and Long 537 



An undescribed species of Peridermium from Colorado, Iledgcock and Long. . . 538 



Alfalfa leaf spot disease, Osborn 538 



A new fungus disease of clover, Bondartsev 538 



Report of the botany division, Barre 538 



Texas root rot of cotton, Heald 538 



A new type of bacterial disease, Smith 539 



Diseases affecting potatoes. Cook 539 



Report on the prevalence of potato blight in Ireland up to mid-July, 1913 539 



Spraying tcstsagainst potato blight, Quinn 539 



Further contribution to the study of Fusarium leat roll of potato, Himmelbaur . . 539 



The pathological anatomy of potato scab, Lutman 539 



Efficif/nc)^ of formaldehyde on seed potatoes for Rhizoctonia, Gloyer 539 



The injurious effect of formaldehyde gason potato tubers, Stewart and Gloyer. . 540 



Some faults in formaldehyde disinfection of potatoes, Hall 540 



Diseases of rice, Butler 540 



The important cane fungi in Santo Domingo, Johnston 540 



On the identity of Bacitlus nicotianae with B. solanacearum, Honing 541 



Weather and stalk disease of wheat, Voges 541 



Studies on frost injury to fruit trees, Sorauer 541 



Winter injury in orchards, Clement 541 



The black spot of the apple and pear, Nicholls 541 



Quince blotch and apple fruit spot. Brooks 541 



Comparative studies of certain disease producing species of Fusarium, Lewis. . 542 



Is apple scab on young shoots a source of spring infection? Morse and Darrow. . . 542 



Apple rust found on fruit, De Jaczowski 542 



Biologic forms of black knot, Gilbert 542 



Vine chlorosis and its treatment, Ravaz 542 



Proportion of iron sulphate used against white rot of grapevines, Blunno 543 



Present status of treatment for cacao canker in Samoa, Friederichs 543 



Gummosis in roots and pots of Acacia, Lutz 543 



Twig canker on black birch, Hartley 543 



The chestnut bark disease, Metcalf 543 



The chestnut bark disease on chestnut fruits, Collins 543 



Chestnut blight resistance, Morris 544 



Injury by oak mildew, Nikodem 544 



Pustule formation on Hevea brasiliensis, Kuijper 544 



Bark rusts of Juniperus virginiuna, Hartley 544 



An epidemic of needle diseases in Idaho and western Montana, Weir 544 



ECONOMIC ZOOLOGY — ENTOMOLOGY. 



Experiments on the destruction of voles 545 



Relative lengtlis of large and small intestines in rodents, Cockerell et al 545 



Five important wild duck foods, McAtee 545 



Report of entomologist, Conradi 545 



Prevalence of some pests and diseases in the West Indies during 1912, Ballon . . . 546 



Entomological pests and pro])lems of southern Nigeria, Peacock 546 



American insects and arachnids concerned in transmission of disease, Morrill. . . . 546 



The Philippine locust, its propagation and distribution, Mackie 546 



Use of poison in control of locusts in Anglo-Egyptian Sudan, King 546 



The biology of Cimex boueti, Joyeux 547 



The chinch bug (BHssils leucopterus), Headlee and McColloch 547 



Burn the chinch bug in winter quarters, Dean and McColloch 547 



The grape leafhopper in the Lake Erie Valley, Johnson 537 



Woolly aphid of the apple (iSc/iwoTieiiraZanVf/cm), Patch 538 



Pseudococcus filamentosus in Dar es Salaam, Kranzlin 549 



A new Eriococcus, Essig 549 



Pernicious scale. — The present position, Lounsbury 549 



Contribution to the study of sericulture in Indo-Chma, Bui-Quang-Chieu 549 



Recent studies of the corpusr-les found in pebrine of the silkworm, Mari 549 



The gipsy and brown-tail moths, with suggestions for their control, Burgess 549 



Codling moth studies in 1911, Ball 549 



Comparison of arsenic and lead in combating Cochylis, Moreau and Vinet. . . . 550 



