504 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 10 



plum tree, infesting largely the fruit." A short color description then follows. These 

 specimens are in the collection of the Bureau of Entomology and prove to be spring 

 migrants of nympheoB. This is possibly the earliest American record of the plum- 

 feeding habit of the species. 



The foregoing information was submitted to Mr. Davidson, but he preferred to 

 confine his remarks to western material. 



Recently we have received specimens from Mr. W. F. Turner, Thomasville, Ga., 

 which add another state to the distribution records. 



A. C. Baker, Washington, D. C. 



Scientific Note on Beetles Causing Damage to Cotton in Yuma Valley, Arizona. 

 In answer to a communication from Dr. A. W. Morrill the writer visited fields in the 

 Yuma Valley of Arizona where severe injury to seedling cotton was reported. In- 

 terviews with leading planters and examination of affected fields brought to light 

 the fact that about 500 acres had been replanted twice following as many complete 

 destructions of the seedling fields. The attempts to secure a stand were finally 

 abandoned, and milo was planted. Careful examinations in these fields revealed 

 the presence in millions of a dirt-colored beetle ^/le-inch long, which has been deter- 

 mined by Mr. E. A. Schwarz as Myochrous longulus Lee. 



In the affected fields not a trace of cotton was to be seen above ground. Search 

 in the soil of the bed rows revealed the presence in great numbers of the above species. 

 The adults were seen in many cases still in place on the underground portion of the 

 stems of the decapitated seedlings, but were also seen commonly feeding on the sub- 

 terranean, succulent stems of arrowweed, trailing-mallow and Baccharis sp. 



All affected fields were in crop for the first time, and, prior to clearing, the land had 

 (last season) supported an almost pure growth of arrowweed {Pluchea sericea). 

 Owing to the ease with which the Myochrous beetles were found on the arrowweed 

 stems it would appear probable that this is the native host of the pest. It is reason- 

 able to suppose, then, that following the eradication of the arrowweed the beetles 

 transferred their attentions to the young, tender cotton plants which were readily at 

 hand. 



E. A. McGregor. 



A Second Importation of the European Egg-Parasite of the Elm Leaf-Beetle. 



In the Journal of Economic Entomology, vol. I, No. 5, 1908, pages 281-289, I 

 gave an account of the importation of Tetrastichus xanthomelaenoe into this country 

 through the help of the late Professor Valery Mayet, of Montpellier, France, and of 

 its apparent establishment in The Harvard Yard and at Melrose Highlands, Massa- 

 chusetts, and of its attempted colonization by the late Dr. John B. Smith at New 

 Brunswick and the late M. V. Slingerland of Ithaca and upon elm trees in Washington 

 near Dupont Circle. Since the publication of this article, this species has not been 

 recovered in the United States. The death of Professor Valery Mayet and the 

 scarcity of the elm leaf-beetle in the south of France for several years, and later the 

 oncoming of the great war, have prevented other attempts to introduce and establish 

 this active parasite. 



On the 25th of June of the present year, however, I received from Prof. F. Picard, 

 of the Ecole Nationale d' Agriculture, Montpellier, a cigar-box full of elm leaves 

 bearing parasitized eggs of Galerucella luteola. I turned the material over to Mr. J. 

 Kotinsky of the Bureau of Entomology, and telegraphed to Prof. J. G. Sanders, Dr. 

 T. J. Headlee, and to the Entomological Department of Cornell University for infor- 

 mation as to the prospects of colonization. The season was already late, and the para- 



