ECONOMIC ZOOLOGY ENTOMOLOGY. 451 



Indiana and Kentucky were dying in large numbers. Examinations made of 

 two rabbits found dead on a farm near Vevay, Ind., four miles from where 

 one of the cases came from, showed the gross lesions of the disease and Avere 

 proved by guinea pig inoculations and bacteriologic examinations to be infected 

 with B. tularcnse. 



The author states that at the time of writing he is engaged in testing out 

 rabbits from Kentucky and Ohio which are in all probability also affected with 

 the same disease; he is inclined to conclude that this rodent disease is widely 

 distributetl and that extensive epizootics among wild rabbits occur frequently. 

 " While the human cases on record were both individuals who had handled and 

 dissected wild rabbits and wei"e both cases of conjunctivitis it seems possible 

 that infection may occur through less direct channels and that other types 

 of infection in man may occur. On the basis of animal experiments it seems 

 possible that ulcerative rhinitis, ulcerative or membraneous sore throat, gastro- 

 intestinal infection, or lymphadenitis secondary to cutaneous infection may 

 occur. Susceptible rodents may be infected by feeding and by the introduction 

 of infectious material into the eye or nose or upon an abrasion of the skin. 

 Experiments on transmission by contact or association have failed in the case 

 of guinea pigs and ground squirrels but a recent experiment was successful in 

 the case of rabbits." 



It is pointed out that rodent fleas may possibly convey the infection to man 

 since McCoy and Chapin succeeded in transmitting it among ground squirrels 

 twice by means of 100 to 500 squirrel fleas, respectively. 



Discovery of Bacterium tularense in wild rabbits and the danger of its 

 transfer to man, W. B. Wherry and B. H. Lamb {Jour. Anwr. Med. Assoc, 

 63 (.1914), No. 23, p. 204I). — A detailed report of the occurrence of this plague- 

 like disease in the two rabbits mentioned in the paper noted above. 



Color key to North American birds, F. M. Chapman {ISlew York: D. Apple- 

 ton tt- Co., 1912, rev. ed.., pp. X-\-356, figs. 84O). — This work, prepared with a 

 view to aiding in the identification of the bird in the bush, consists of an intro- 

 duction, synopsis of orders and families of North American birds, color key 

 to North American birds, and a systematic table of North American birds. An 

 appendix contains a faunal bibliography (pp. 305-331). 



Common corn insects, R. L. Webster (loiva Sta. Circ. 23 {1915), pp. 16, 

 figs. 15). — This is a popular account of the insect enemies of corn in Iowa. 



Katydids injtirious to oranges in California, J. R. Horton and C. E. Pem- 

 BEKTON {U. B. Dept. Agr. Bui. 256 {1915), pp. 2//, pis. 5, figs. i6).— This bulletin 

 reports studies conducted with two species of katydids, the fork-tailed katydid 

 {Scndderia furcata) and the angular-winged katydid {Microcentrum rhoniM- 

 foUiini ) . 



The amount of injury caused by S. furcata increased considerably from 1910, 

 when it first came to attention, until 1912, when it caused a loss in several 

 orchards of a full fourth of the crop. A single katydid may destroy several 

 small oranges in a day, the orange once attacked being invariably rendered 

 unfit for sale. The young katydids are on the trees and actively feeding and 

 the injury usually begins about the time the petals are dropping. The blos- 

 som buds are sometimes attacked, a hole being gnawed through the petals to 

 reach the pistils and ovary, which are often destroyed in a considerable number 

 of blossoms. The injured oranges usually have been moi'e than one-third 

 destroyed, or have received one or more holes large enough to admit the head 

 and thorax of the slender katydid nymphs, these holes often extending entirely 

 through the orange. At picking time many of these damaged fruits are con- 

 spicuous owing to the clean-cut circular holes in the rind, which vary from the 

 size of a dime to about that of a silver dollar. 



