250 EXPERIMENT STATION RECOED. 



East African termites, H. Mokstatt {P/ianzer, 9 (1918), Nos. 3, pp. 130-141, 

 pis. 3; 9, pp. 443-464, pis. 3). — The first part of this paper consists of a general 

 discussion of termites; the second part relates to the Natal termite (Terrnes 

 natalensis) and other species which attacli rubber trees. 



The croton bug- (Ectobia germanica) as a factor in bacterial dissemination, 

 W. B. Heems and Y. Nelson (Amer. Jour. Pub. Health, 3 {1913), No. 9, pp. 

 929-934, fig. 1). — It is pointed out that the croton bug {E. germanica), which 

 feeds by preference upon the food of man, is commonly found in situations 

 where infective sputum or excrement exists, and that it is structurally equipped 

 to collect filth and bacteria upon its appendages, though this equipment is not 

 as effective as in the house fly. It has the ability to pick up bacteria on its 

 feet and mouth parts and deposit these on human food. The bacterial popula- 

 tion of a single croton bug was found to be a minimum of 13,370 bacteria. 



" The croton bug carries more bacteria upon its hind pair of legs than on its 

 middle and fore legs combined. The croton bug is normally nocturnal in habit 

 though it may be active during the day, and is more or less omnivorous in 

 food habit. The eggs of the roach are laid in pairs (13 pairs usually) in an 

 egg case which is carried for several months by the female. The young 

 roaches require evidently not less than one year to mature and probably more. 



" The usual trapping methods are not very effective in the control of the 

 croton bug. Sweet mixtures containing borax or flour and plaster of Paris 

 with water available are recommended as good remedies." 



Monograpli of the Gryllidae of Formosa with a review of the Japanese 

 species, T. Shiraki {MonograpMe der Grylliden von Formosa, mit der Ueber- 

 sicht der Japanischen Arten. TaihoJcii, Formosa: Govt., 1911, pp. 129, pis. 2). — 

 A synopsis of the family in which a large number of species are described as 

 new. 



Nine new Thysanoptera from the United States, J. D. Hood {Proc. Biol. 

 S^oc. Wash., 26 {1913), pp. 161-166). — Of the nine species here described as new 

 Liothrips montanus from the currant and gooseberry at Bozeman, Mont., is of 

 economic importance. 



The thysanopterous cecidia of Java and their inhabitants, H. Karny and 

 W. and J. Van Leeuwen-Reijnvaan {Bui. Jard. Bot. Buitenzorg, 2. ser., 1913, 

 No. 10, pp. 126, figs. 86). — The authors first discuss the cecidia from a botanical 

 standpoint (pp. 1-54), following which they deal (pp. 55-123) with the 47 

 species and subspecies of thrips concerned, of which 20 forms are described as 

 new. 



Frog-hoppers, J. C. Kershaw {Dept. Agr. Trinidad and Tobago Bui., 12 

 (1913), No. 72, pp. 3-12, pis. 3). — These miscellaneous notes make up Special 

 Circulars 3 to 7. 



The vermilion egg parasite of the froghopper has not been reared in captivity 

 during the dry season in sufficient numbers to give any great encouragement 

 that it will check the froghopper. In addition to the use of the green muscardine 

 fungus, which has given good results in the past and is now being used on a 

 large scale, the author suggests 3 other means of combating the pest. (1) the 

 application of nitrolim (calcium cyanamid) ; (2) kerosene-lysol emulsion (lysol 

 3 oz., kerosene 9 oz., and water 4 gal.) ; and (3) the removal and destruction 

 of dry leaves on which the eggs may have been deposited. The notes include 

 a discussion of the male genital armature of Tomaspis. 



The sugar cane froghopper and biological notes on some cercopids of 

 Trinidad, F. W. Urich {Dept. Agr. Trinidad and Tobago Bui., 12 {1913), No. 

 72. pp. 12-51, pis. 7, figs. 9). — This report reviews records of froghoppers in 

 other countries; gives a discussion of the origin and distribution of the sugar 

 cane froghopper, its life history and habits, natural enemies, and artificial 



