960 EXPERIMENT STATION RECORD. 



On the other hand, soaps, tobacco extracts, oils, corrosive sublimate, calcium 

 ehlorid, soda, and alum proved to be of no avail. 



Biological and economic notes are also given on cockchafers and flower beetles. 

 Directions are furnished for fumigation of nursery stock and greenhouses with 

 hydrocyanic-acid gas. 



Biological notes on Megilla maculata, A. A. Girault {Jour. N. Y. Ent. 

 Soc, 15 (1007), Xo. Jf, pp. 193-197). — Specimens of this ladybird were kept in 

 captivity for the purpose of taking observations on the period of incubation, 

 the duration of tlie larval stages and the behavior of the adults under these 

 conditions. Data are given in tabular form on the observations thus made. 



Preliminary note on the distribution of the tiger beetles and its relation 

 to plant succession, V. E. Shelforu {Biol. Bui. Mar. Biol. Lab. Woods Holl, 

 llf {1907), No. 1, PI). 9-lJt). — A study of the distribution of the common species 

 of the tiger beetle in the vicinity of Chicago showed that each species is found 

 chiefly in a cei'tain habitat to which it appears to be best adapted. The faunas 

 observed in these different habitats were strikingly different. The author be- 

 lieves that the local flora and plant succession are factors which must be taken 

 into account in the consideration of the distribution of animal species. 



An injurious North American species of Apion, with notes on related forms, 

 F. H. Chittenden {U. H. Dcpt. Ayr,, Bur. Ent. BiiJ. ii',, pt. Jj, pp. 29-32, fly. 1).— 

 Apion griseum is reported as injurious to the seeds of Phaseolus retusus and 

 P. wriyhtii. The same insect has been observed to develop in the seed of P. 

 jjolystachyus, and is believed to be the species which has been reported as living 

 in P. pauciflora. 



Brief biological notes are also given on Apion colon and a number of other 

 species of this senus. 



Migrations of locusts and means of combating these pests, J. S. De An- 

 CHORENA {(Jom. Dcfensa Ayr. [Buenos Aires], Bol. Mens. Mov. Lanyosla, 1907, 

 Sept., pp. 11, map 1). — Statistics are given on the extent of destruction of 

 locusts in the adult and egg stages in various provinces of Argentina. During 

 the months of July, August, and September in 1907 adult locusts were destroyed 

 to the extent of more than ,8,000,000 kilos. 



The destruction of locusts {Natal Ayr. Jour, and Min. Rec., 10 {1907), No. 

 10, pp. 125H-126')). — A furnnila is given for the preparation of white arsenic 

 and sodium arsenite solutions of various strengths for use in poisoning locusts. 

 Mention is also made of the egg-laying habits of locusts and of a snake which 

 feeds upon these insects. 



Combating the larvae of grain flies, Tacke {Pralct. Bl. Pflanzenhau u. 

 Schutz, n. ser., 5 {1907), No. 11, pp. 121, 122). — The larvae of various species of 

 Tipula sometimes cause great damage. They are not confined to any particular 

 kind of soil and may attack almost all sorts of agricultural plants. The usual 

 remedies of applying fertilizers, carbon bisulphid, etc., proved of little avail, 

 and the only remedies which gave satisfactory results were thorough rolling of 

 the soil and the encouragement of insectivorous birds, particularly the starling. 



The tobacco suck fly, J. R. Inda {Com. Par. Ayr. [Mexico], Circ. 69, pp. 6, 

 fly. 1). — The life history and injuries caused by Dicyphus minimus are 

 described and brief notes are given on its natural enemies. In combating the 

 pest the author recommends clean cultivation, the destruction of rubbish about 

 tobacco fields, and the application of a nicotine solution to affected plants. 



Insects injurious to vegetables, F. H. Chittenden {Neio York and London, 

 1907, pp. XIV +258, flys. 163). — Garden crops are subject to the attack of a 

 great variety of insect pests, but in the author's opinion these pests have re- 

 ceived relatively less attention than those of fruit trees. The purpose of the 

 present volume is to present a succinct account of the appearance, habits, life 



