1920] CONTENTS. V 



Page. 



Summary [of white pine blister nist worlv, 1919], Detwiler 24S 



Scientiflc research in 1919 [on white pine blister rust], Spaulding 240 



Artificial infection with Cronartium ribicola, Clinton and McCormick — 249 



ECONOM IC ZOOLOGY — KNTOMOLOGY. 



The zoological record, Sharp 250 



Control of the coyote in California, Dixon 250 



Kats and mice as enemies of mankind, Hinton 250 



A synoptical list of the Acciptres (diurnal birds of prey), Swann 250 



The biologj- of the arvicole in Apulia, Martelli 250 



Birds and tent catiM-pillars, Saunders 250 



Seciind note on peculiar fun.uus-parasites of livins; insects, Tliaxter 250 



Niiu^tccnth report of the State entomologist for 191!), Ilrittoii 250 



Division of insect suppression. — Progress of work, 1917-18, O'Kane 252 



Notes in connection with insect pests, Watts _ 252 



Contributions to tlio knowle<lge of insect pests, IV, V, Silvestri 252 



Report of the entomologist, Newman 252 



[Kei)ort on] entomology 252 



Cotton insects in I'orto Kico, Smyth 252 



How in.sects affect the rice crop, Webb 252 



Wheat and its pests, Kathbone 253 



Effect of air-tight storage on grain insects, III, Dendy and Elkingtou — 253 



Vitality and rate of multiplication of grain insects, Dendy and Elkington 254 



Dusting i\ spraying for control of avocado insect pests, Moznette 255 



Important dried fruit inscK'ts in Califorrua. Essig 255 



Spray calendar 250 



A revision of the Nearctic termites. Banks and Snyder 256 



The meadow plant bug, Miris dolobratus L., Tullgren 250 



The grape scale in Calif(»rnia, Essig 25G 



The spermatogenesis of the louse, Doncaster and Cannon 250 



The pea moth : How to control it, Fluke 257 



New moths from INIexico, Dyar 258 



Exterminating the mosquito, Painter 258 



A second Culex of the subgenus Transculicia, Dyar 258 



Note on the subgenus Neoculex of Culex, Dyar 258 



The mosquitoes of British Columbia and Yukon Territory, Canada, Dyar_ 258 



A new Brazilian species of Anastrepha, Bezzi 258 



Combating the blow liy, Russell and Brown 258 



The sweet potato weevil (Cylan formicarius), Reynolds 258 



The yam weevil (Paleopus dioscorece Pierce), Merrill 258 



B«'ekeeping for beginners. Parks 258 



The beginner in bee culture, Goodacre 259 



American honey phints, Pellett , 25'.) 



The Argentine ant as a household pest, Barber 1_- 259 



Some new parasites with remarks on the genus Plalygaster, Fouts 259 



Ichneumonid parasites of European pine shoot motli, Smits van Burgst — 259 



The western grass-stem sawHy, Ainslie 259 



Tromhidium akamushi and similar mites, Miyashima and Okumura 260 



FOODS — HUMAN N'lTTRITION. 



Food industries, I'etit 200 



The J. G. Forkner fig gardens recipes, Forkuer 261 



The bacteriology of ropy bread, Seligmaiui 261 



Dietotherapy, Fitch 261 



Pood poisoning and food infections. Savage 261 ' 



Influenza-pneumonia as influenced by dish-washing, Gumming 261 



Present knowledge concerning accessory food factors, Hopkins et al 262 



[Beriberi and scurvy], Hehir 262 



Treatment of diseases due to deficiency of diet, Willcox 263 



Pellagra, Viswalingam 263 



Some further observations on the etiology of " pellagra," Viswalingam — 263 



Relation of diet to i)ellairra incidence, Goldberger et al 264 



Experimental rk-kets. Koch 264 



Energy of urine in undernutrition and cachexia, FUrth and Kozitschek__ 264 



I 



