ENTOMOLOGY. 973 



and ti iiKxlcTii period, embracing general works on dragon flies^, works relating to 

 European dragon Hies, tn Britisli dragon flies, and to American dragon flies. 



Evolution of our knovrledge of the Ichneumonidae during the nineteenth 

 century, C. Mokley {Ent. Bee. and Jour. Variation, IS {1901), No. 1, pp. 15-18). — The 

 author ilhistrates the progress made in the knowledge of this group of insects by 

 references to the more important literature on the subject. 



A study of the structure of the ocelli of insects, W. Redikorzew {Ztschr. Wiss. 

 ZiioL, 68 {1900) , No. 4, pp. 580-624, ph. 2, figa. 7).— The author discusses in detail the 

 microscopical elements of the simple eyes in insects. IMaterial for this study was 

 obtained from a number of species, of which mention may be made of the honeybee, 

 syrphus flies, and species of Cimbex and Perla. A bibliography of the subject is 

 appended to the article. 



Parthenogenesis in bees, A. Weismann {Anat. Anzeiger, 18 {1900), No. 20-21, 

 pji. 492-499). — The author discusses in a general way the factors which have been 

 supposed by different authors to be concerned in determining the sex of different 

 members of the l)ee colony. 



The treatment of foul brood by eucalyptus, salicylic acid, and formic acid, 

 J. B. Gkamoxt {Rer. Iiitciiiuf. Apieult., 22 {1900), No. 10, pp.225, 226).—¥vom obser- 

 vations and experiments the author concludes that the most effective and convenient 

 method of treating hives infected with this disease is by the use of formaldehyde. 



The use of honey, J. Crepieux-Jamin {Rev. Internat. Apieult., 22 {1900), No. 10, 

 pp. 206-210). — The author reports a number of cases in which honey was eaten in 

 considerable quantities after fatiguing exercise. The results indicated a beneficial 

 effect from the Imney. 



The common European praying mantis, a ne-w beneficial insect in America, 

 M. y. Slingerland {New York Cornell Sfa. Bvl. 185, pp. 33-47, figii. 14). — This 

 insect has recently been discovered in the neighborhood of Rochester, N. Y., and it 

 is believed that the species was introduced into this country by a nurseryman. 

 Brief notes are given on its habits and life history. 



Report of the entomologist, L. Bruner {Nebraska State Bd. Agr. Rpt. 1899, pp. 

 103-142, pl.'i. 16). — In this report the author discusses in a popular manner the 

 insects which are injurious to native grasses on prairies and in meadows. Especial 

 attention is given to the leaf hoppers, and a brief bibliography is presented on the 

 insects which affect grasses. W. D. Hunter presents an additional list of insects 

 injurious to clover and alfalfa. 



Report of the zoologist, II. B. Ward {Nebraska State Bd. Agr. Rpt. 1899, pp. 

 193-205, figs. 6). — This report contains an account of the ticks of Nebraska. An 

 analytical table for the determination of species is given, and notes are presented on 

 the life history and habits of Argas arnericanus, OrnHhodoros rnegnini, Derinacentor 

 america)ius, Boophilnx bovis, Ixodes reduvhis, and Amblyomma americanum. 



Report on the work of the State entomologist for the year 1899, S. Lampa 

 {Eiit. Tidskr., 21 {1900), No. 2, pp. 49-96). — The author gives a detailed account of 

 the office of the State entomologist. It is stated that Pyrethrum roseum has been 

 grown successfully on the grounds near the office, with the result that a suflScient 

 quantity of pyrethrum powder has been manufactured for a jear's supply. The 

 Hessian fly and Chlorops jiumiUoms are reported as causing considerable damage in 

 the region of Gotland. Great destruction was wrought by Lymantria rnonacha. An 

 assistant conducted a numlxjr of spraying experiments with a 2 to 4 per cent solution 

 of lysol in water and witii a kerosene emulsion. The buds of fruit trees were not 

 injured ])y a 1 per cent solution of lysol. 



Brief notes are given on the habits and life liistory of Hadena bus'dinea, Tipida 

 olcrarea, Agriotes lineaftt.i, A. i<rgelnm, cal)l)age-root maggot, Ps'da ros.v, (Jharivas gratn- 

 iniji, Argyrextliia coiijvgella, codling moth, and numerous other injurious insects. 



19607— No. 10 — -6 



