552 EXPERIMENT STATION RECORD, 



but that neither epss nor younj,' wow fdiiinl upon il. 'I'l'dmicMl doscriptions nre 

 piven of the eniX and 5 instars. 



Two new genera and species of Aphididae, J, J. Davis (Ann. Ent. >Soc. Amcr., 

 ,.' il'.io'J). So. ,i, 1)1). I'Mi-.iOd. pi. I). — I'hintKilosiitlinm iiioiirUi, collected in May 

 and .June from Ohio buckeye (.i'scw/H.s- glabra), at St. Louis, Mo., and Idiop- 

 tcniK nrphrch'i)i(lis, taken from ferns in a greenhouse at Western Sprinjis, 

 111., in December, are the genera and species described as new. The latter 

 species was also fomid to be injuring sword fern in a Chicago greenhouse. 



Plant louse notes, family Aphididae, C. P. Gillette (Jour. Econ. Ent., 2 

 (I'lO!)), Xo. o, in>. J-')l-'l')S, pi. 1). — Brief notes are first given on Fitch's types, 

 which were examined by the author. Attention is called to the fact that 

 Fitch considered all winged aphids to be nial(>s. I'^icld notes presented relate 

 to 24 species. 



Some new records of Aphididae in North America, II. F. Wilson (Jour. 

 Econ. Ent., 2 (I9(ni), No. 5, pp. 3.'f6-350, jiijs. ,3).— A new aphis enemy of 

 bananas (t'oitdlonhi ninronn-rom), which had been found very abundant on 

 banana plants in the greenhouses of this Department and is supposed to have 

 been imported on banana plants, is redescribed. 



Aphis unyclicu\ which in Europe feeds on Aiif/rlica sjiirr.slris, has been found 

 to infest a species of Angelica and ivy in California. Drcpanosiphum plata- 

 noiden is reported from North America for the first time, having been taken on 

 a maple at Lorenzo, Cal. 



Notes on Aphididae collected in the vicinity of Stanford University, W. :\I. 

 Davidson {Jour. Econ. Ent., 2 (1909), No. -'/, pp. 299-305).— Of the many 

 species here noted, 5 are described as new to science and 2 or 3 European 

 forms are reported from America for the first time. 



AphididEe or plant lice, E. P. Felt iJonr. Econ. Ent., 2 (1909), No. //, /)/). 306, 

 .'^07). — Notes on numerous species unusually abundant or destructive in the 

 State of New York in 1909 are presented. 



Experimental transmission of exanthematous typhus by the body louse, 

 C. NicoLLE, C. CoMTE, and E. Conseil {Compt. Rend. Acad. Sci. [I'ari.'i], 1^9 

 (1909), No. 10, pp. Ji86-Jf89, figs. 2). — The authors, working in Tunis, succeeded 

 in transmitting typhus fever from an infected macacus monkey (Macacus 

 .sinicus) to a healthy one by means of the body louse (PcdicuUis rcslimcnti). 



The typhus fever of Mexico, H. T. Rkketis and R. M. Wilder (Jour. Amcr. 

 Med. Assoc, ').'( (1910), No. 6, pp. .'f63-Jf67). — In regard to the transmission of 

 this disease the authors state that of the 3 insects which are most open to 

 suspicion, namely, the body louse, the bedbug, and the flea, only the first named 

 would seem to merit serious consideration because of the epidemiology of the 

 disease. Experiments with this louse (Pediculus vestimenti) are now under 

 way. 



The authors were able to confirm the probable susceptibility of the monkey 

 to inoculations with the blood of patients suffering from the typhus fever of 

 Mexico, as reported by Anderson and Goldberger in a publication previously 

 noted (E. S. R., 22, p. 284). Filtration experiments indicate that the virus of 

 typhus fever of Mexico may be classed with the unfilterable viruses. 



The pine-leaf and the green-winged Chermes, Edith M. Patch (Maine >Sta. 

 Bui. 171, pp. 200-20-'/, figs. 3). — A brief account is given of the pine-leaf Chermes 

 (C. pinifolia), which, during the summer of 1909, badly infested pines in the 

 vicinity of Orouo. Spraying with whale-oil soaii (1 lb. to 2 gal. of water) will 

 doubtless destroy the young on the white pine shoots, but it is considered doubt- 

 ful whether this would be worth while in Maine where syrphus flies are 

 abundant, 



