ENTOMOLOGY. 881 



Experiments were made to test the possible action of the active principle of walnut 

 trees in the control of these insects. Good results were obtained from pouring a 

 decoction of the leaves of Jiiglans regia upon the woolly aphis and in the soil about 

 the roots of infested trees. 



The destruction of grapevine flea-beetles, J. Bonhomme {B\d. Agr. Algcrie et 

 I'miisie, 10 {1904), No. 1, pjj. 15, 16). — According to experiments reported in this 

 paper grapevine flea-beetles may be quite successfully controlled by infection witli 

 Botr)/ti.< bassiana. Cultures of this fungus were distributed on leaves upon which 

 the larv;e were feeding. Upon examination of the larv* later it was found that the 

 spores t^aten by them had germinated and caused death by gradual infectioiT of all 

 the internal organs. 



A new organ in Phylloxera vastatrix, H. Stauffacher [Allg. Ztschr. Ent., 8 

 {190S), No». J-S, pp. .jO-35; 4, PP- 57-60, pd. 1, figs. -^).— In studying the anatomy of 

 this insect the author discovered a new organ on the ventral side of the body between 

 the first and second thoracic segments. The organ is paired and is believed to be 

 the organ of hearing. The gross and microscopic anatomy of this structure is 

 descril)ed in detail. 



Extensive outbreaks of Lymantria monacha during the years 1898-1902, 

 J. jNIeves {Ent. Tuhkr., 24 {1903), No. 4, pp. 225-229) .—Det&Wed notes are given on 

 the occurrence of this insect in various parts of Sweden during the past 4 years. In 

 forests composed of large trees there is no practical means of combating the insect, 

 except by felling and removing infested trees. Eradication may be somewhat 

 assisted })y infectious diseases. Vigorous trees under 3 years of age are rarely 

 attacked. In cases where the insect is present only in small numbers the outl)reak 

 mu}- be checked to a considerable extent by collecting the eggs and destroying the 

 moths. 



Liasiocampa pini as a forest insect, J. Meves {Ent. TkUkr., 24 {1903), No. 1, 

 pp. 61-64, pi. 1). — The habits and life history of this insect are briefly mentioned 

 with special reference to suitable means of combating it. The insect attacks pine 

 and spruce trees of all ages. Experiments showed that the larvae were capable of 

 withstanding a temperature of —10° C, and it is l)elieved that the i)est winters over 

 to a considerable extent in the larval condition. 



Studies of the life history, habits, andtaxonomic relations of a new species 

 of Oberea (0. ulmicola) , F. i\r. Webster {Bui. llHnoiti State Lab. Nat. IBM., 7 

 {1904), Art. 1, pp. 1-14, pifi. 2). — This sjiecies has thus far been found only in a sin- 

 gle town in Illinois, where it appears to be confined to one section of the city. The 

 technical descrii)tion of the species is given by F. H. Chittenden, and the account of 

 the habits and life history is largely based on observations l)y E. 8. (J. Titus. 



The insect apjiears to be confined in its feeding habits to the American elm. There 

 is only 1 generation annually, and the larvae hibernate in the twigs. The pupal 

 period occupies from 22 to 29 days. The eggs are deposited from May 20 to June 15. 

 The effect of the attack of this insect upon elms is to cause the development of clus- 

 ters of small twigs upon the sides of the branches, and to bring about the premature 

 falling of the leaves. 



The method by which young w^illow^s protect themselves against the 

 attacks of Dichelomyia rosaria, 1*. Speiser {Allg. ZtscJir. Ent., S {1903), No. 10-11, 

 pp. 2f>4-206, fig. 1). — In studying willows attacked by this gall-forming insect, the 

 author found that affected branches grew downward in a spiral manner, and that the 

 growth of the affected twig was continued by means of the rapid development of the 

 bud lying innnediately below the affected one. 



Galls on Abies pectinata, K. Eschericu and E. Wimmer {Allg. Ztschr. Ent., 

 S {1903), No. 6-7, 2U>- 119-122, figs. 4)- — A detailed descTiption is given of the galls on 

 the needles of this tree which an^ due to the attacks of a species of Lestodiplosis. 



Pulex vagabunda, E. Wahlgken {Ent. Tklskr., 24 {1903) , No. 2-3, p. 219).—Bnet 



