ECONOMIC ZOOLOGY — ENTOMOLOGY. 559 



nients conducted to determine its adaptability t«; otlicr UhhI iiiaiits are dis- 

 cussed. The experiments indicate that under natural conditions in the field 

 this aphis will not change from the Erigeron to corn. 



A list of the genera described as new from 1758 to 1909 in the family 

 Aphididie, H. F. Wilson (Ent. Notes, 21 {U)1Q), Xo. J,, pp. j ',7-156).— Om^ 

 hundred and eighty-two genera are listed. 



Notes on the two papers on Aphididae by Rafinesque, H. F. Wilson {Proc. 

 Ent. Soc. Wash., 12 {1910), No. 1, pp. 27-30).— During the summer of 1909 an 

 attempt was made to locate some of Rafinesqne's sjiecies by collecting speci- 

 mens from the plants named by Rafinesque and comparing them with his de- 

 scriptions. In this way the identity of several species was determined. 



The natural enemies of the citrus mealy bug, I, E. O. Essig {Poinoixi Jour. 

 Ent., 2 (1910), No. 1, pp. l.',S-l.'i6, figs. 3).— The brown lace-wing {Symplirr- 

 obius angustus) is considered in this paper. 



Mealy bug and fumigation, C. F. Baker et al. {Clarcmont Pomol. Club Bui. 

 Is pp. 23, figs. .',). — The citrus mealy bug is here discussed by a number of 

 authors. 



The white fly, C. E. Hood (Massachuftetts Sta. Circ. 19, pp. 2). — A brief 

 account of the greenhouse white fly and the remedial measures applicable. 



The purple and red scales, C. C. Chapman et al. {Cinremont Pomol. Club 

 Bui. 2, pp. l-'i, figs. 7). — Brief accounts of these scales by several authors. 



On scale insects (Coccidse), etc., from the Uganda Protectorate, R. Newstead 

 {BuJ. Ent. Research. 1 (1910). No. 1, pp. 63-69, figs. 2).— Six species are noted, 

 of which ^tictococcus climorphus from German East Africa and from cacao pods 

 in Uganda- is described as new to science. Ceroplastes ceriferus, which attacks 

 coffee, cacao, agave, canna, croton, hibiscus, and other crops, is said to occur in 

 suflBciently large quantities to be of economic importance. 



Observations on the life history of Trypanosoma lewisi in the rat louse 

 (Haematopinus spinulosus), A. Breinl and E. Hindle (Ann. Trop. Med. and 

 Par., 3 (1910), No. 5. pp. 553-56-'f, pis. 2). — A report of experiments which have 

 extended over a period of more than a year concerning the mode of transmission 

 of Trypanosoma leicisi by means of the rat louse (H. spinulosus) . 



On the etiology of tabardillo or Mexican typhus. — An experimental inves- 

 tigation, J. F. Anderson and J. Goldrerger(./oh/\ Med. Research, 22 ( 1910), No. 3, 

 pp. Ji69-.'i81). — Body lice (Pediculus vestimenti) kept during the day at a 

 temperature of from 24 to 27° C. lived but a comparatively short time, while 

 in those kept at a temperature of 14 to 20° the mortality was relatively slight. 

 " This influence of temperature on the longevity of the louse seems to us strik- 

 ingly significant : it explains the rarity if not absolute nonexistence of this 

 insect in the tropical coastal strip of Mexico, where tabardillo never occurs 

 except as isolated imported cases; it makes understandable the singular limita- 

 tion of the disease to the temperate climate of the central plateau ; and it is in 

 harmony with the seasonal prevalence and geographic distribution of the 

 disease." 



Further investigations regarding the etiology of tabardillo, Mexican 

 typhus fever, II. T. Kicketts and K. -M. Wildi r (Jour. Amer. Med. Assoc.. .55 

 (1910), No. ),, pp. 309-311). — This paper reports results obtainetl since one pre- 

 viously noted was prepared (E. S. R., 2.3, p. 57). 



The progeny of body lice that had been reared to maturity on infecte<l pa- 

 tients were placed on a normal macacus monkey on April 28. but its temperature 

 could not be taken following the application. Although found on May 26 to 

 be in good health it proved resistant to a subsequent immunity test. Several 

 bedbugs infected through repeated feedings on typhus patients failed to trans- 



