1918.J ECONOMIC ZOOLOGY ENTOMOLOGY. 559 



Key to the species of Leptoglossus occurring north of Mexico, E. H. Gib- 

 son (Psyche, 24 {1911), No. S, pp. 6V-7S). 



On the possibility of the transmission of plague by bedbugs, J. W. 

 CoBNWALL and T. Kesava Menon {Indian Jour. Med. Research, 5 {1917), No. 

 1, pp. 137-159). — The authors find that bedbugs fed on a case of septicemic 

 plague are a potential source of danger, 



" Meals which contain bacteria are frequently fatal to bugs. On occasion 

 bugs may survive an infection with Bacillus pestis for 38 days, and the bacillus 

 may be recovered from their stomachs by culture at the end of that time. 

 Bugs can not regurgitate their stomach contents in the act of feeding. If, 

 therefore, bugs transmit plague by biting, they must do so by washing out 

 with the saliva bacilli which have been stranded in their sucking tubes. Bacilli 

 are not likely to remain m the sucking tube for long after an infected feed. 



" It can not yet be stated for certain whether bugs can or can not transmit 

 plague by biting. The likelihood of the transmission of human plague by bugs 

 in biting under natural conditions is small." 



The hop redbug (Paracalocoris hawleyi), I. M. Hawley {Jour. Econ. Ent., 

 10 (1917), No. 6, pp. 545-552, pi. 1, figs. 8).— Each year since 1913 this pest has 

 increased in numbers and caused more and more injury in hopyards about 

 Waterville, N. Y., especially in the vicinity of Sangerfield, by perforating the 

 leaves and stunting and deforming the stems. The initial injury is made evi- 

 dent by many light spots in the still unfolded leaves. 



An account of its life history is accompanied by technical descriptions of 

 its several stages, including five nymphal Instars. The overwintering eggs are 

 laid in hop poles from the middle of August until September and hatch the 

 following year from June 1 until nearly the first of July. The nymphal period 

 lasts about 30 days, the adults beginning to appear about the first of July. 



Several predators are mentioned as natural enemies, including Apeteticus 

 maculiventris, Reduviolus subcoleoptratus, and Trombidium sp. Blackleaf 40, 

 at the rate of 1 pint to 100 gal. of water with 6 lbs. of soap, applied on July 17, 

 apparently killed at once. In order to be successful the spraying should be 

 done about the third week in June before the vines have produced large arms. 



A contribution to the knowledge of the biology of Tingis pyri, D. Dueante 

 (Bol. Lab. Zool. Gen. e Agr. R. Scuola Sup. Agr. Portici, 11 {1917), pp. 282-290; 

 aba. in Rev. Appl. Ent., Ser. A, 5 {1917), No. 8, p. S42). — A report of observa- 

 tions of this pest made during the spring of 1914 on apple trees on which an 

 outbreak had occurred the previous summer. 



The apple and pear are the cultivated plants in Italy usually attacked, 

 although a case was observed where an infestation of a plum tree took place 

 from nearby apple trees. The following sprays were found to give satis- 

 factory control: (1) Petroleum 1 lb., soft soap 1 lb., and water 10 gal., or 

 (2) soap 2 lbs. and water 10 gal., and (3) soft soap 1 lb., carbolic tobacco 

 extract 1 lb., and water 10 gal. 



A few notes chiefly on the names of nearctic Tingidse, W. L. McAtee {Bui. 

 Brooklyn Ent. Soc, 12 {1917), No. 4, pp. 78, 79). 



Key to the nearctic species of Leptoypha and Leptostyla, W. L. McAtee 

 {Bui. Brooklyn Ent. Soc, 12 {1917), No. 5, pp. 55-64). 



Amphiscepa bivittata in its relation to cranberry, H. B. Scammell {Jour. 

 Econ. Ent., 10 {1917), No. 6, pp. 552-556, pi. 1). — This is a report of observa- 

 tions of the biology of the fulgorid A. bivittata, made during the course of cran- 

 berry insect investigations in New Jersey and on which but little has been 

 previously reported. The author suggests that, since this insect is commonly 

 associated with the cranberry and attacks the woody stems and not the foliage of 



