ECONOMIC ZOOLOGY ENTOMOLOGY. 167 



and treatment of newly planted vines, and also of old, run-down vineyards in 

 relation to this insect problem. 



A bibliograpliy cbrouologically arranged is appended. 



Notes on Cetonia aurata and C. floricola, A. H. Hamm {Ent. Mo. Mag., 2. 

 so:, 21 {1910), No. 2J,6, irp. 137, 138, fig. i).— The author's observations appear 

 to prove that the larvre of C. aurata feed for several seasons before reaching 

 maturity, that the imagos can hibernate and pass the winter in a quiescent 

 state, and that all larvie of the same age do not reach maturity together. 



The economic importance of Scolytidas in Irish, forestry, A. C. Foebes 

 (Irish Nat., 19 (1910), No. 5, pp. 89-91, pi. i).— Brief mention is made of sev- 

 eral species of bark beetles which may under certain exceptional circumstances 

 prove troublesome to the forester or tree grower in Ireland. 



An introduction to the study of Rocky Mountain bees, T. D. A. Cockerell 

 and W. W. Robbins (Univ. Colo. Htndics, 7 {1910), No. 3, pp. 179-195, pis. 8). — 

 A summary of the classification adopted, in which most of the genera are dis- 

 tinguished, is first given. As an appendix there follows a brief abstract of 

 Robertson's classification. An artificial key is included. 



A radical cure for the swarming habit of bees, H. Jones {Preston, Minn., 

 1910, pp. 25). — The author recommends the uncapping of all but two frames of 

 the sealed brood in each hive when the hives become filled to overflowing. The 

 work should be repeated if at any time within 15 days the colonies are found 

 making preparations to swarm. 



Notes on a Colorado ant, H. O. Marsh (U. S. Dept. Agr., Bur. Ent. Bui. 6.), 

 pt. 9, pp. 73-78). — The notes here presented relate to Formica chiereoruflbarMs, 

 a species which occurs very commonly in the vicinity of Rocky Ford, Colo. It 

 is said to be a source of injury due to its attending the melon aphis on cucur- 

 bits and a membracid on alfalfa. 



In experiments in which solutions of potassium cyanid were used on nests 

 * oz. per gallon of water was found to be nearly as effective as 2 oz. per gal- 

 lon. Since the cyanid solution does not penetrate very deeply into the nests, 

 the pupfe escape destruction unless they are very close to the surface. It is 

 concluded that in order to keep the species within reasonable bounds, repeated 

 applications of the cyanid are necessary. 



The control of the Ai'gentine ant, C. W. Woodwokth {California Sta. Bui. 

 207, pp. 53-82, figs. 28). — Through the discovery of new localities and the nat- 

 ural spread of this ant more than twice as much territory in California as that 

 reported in 1908 (B. S. R., 20, p. 352) is now known to be infested, or some 

 1.000 acres in southern California and 4,000 acres in the central portion of the 

 State. Careful observations made of the spread of this ant for 2 years show 

 that the average extension of the colony has not exceeded one-eighth of a mile 

 a year and indicate that its spread depends primarily upon the ant being carried 

 liy man. Manure and nursery stock are particularly liable to be means of trans- 

 portation, though the pest may be carried with all sorts of merchandise. Obser- 

 vations of winged individuals, produced in great quantities both in the labora- 

 tory and in the field, indicate that there is no flight whatever, so that it appears 

 that there is practically no danger of spreading by the flight of queen ants. 



Further study has shown that the danger due to the direct attack of this 

 insect upon vegetation is not as large in California as that reported from 

 Louisiana. At the same time, the author states that it is probably very con- 

 servative to estimate that the presence of the ant reduces the commercial value 

 of real estate for residence purposes from 10 to 25 per cent. 



The distinctive characteristics of the ant are pointed out and some 46 other 

 species known to occur in the State are briefly discussed and treatment sug- 

 gested. Control measures are considered under the headings of barring ants 



