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doubtful. He adds, however, that its promise is sucli as to make it 

 well worth while for anyone interested to try the exi^eriment thor- 

 oughly and carefully, and he offers to supply material for infection to 

 anyone desiring to experiment. 



THE 3rEALY BUG DAMAG-ING COFFEE IN MEXICO. 



Among the many applications which we have received, since the suc- 

 cessful introduction of Yedalia into California, for specimens of this 

 beneficial insect, to be used against other scales in different parts of 

 the world, none has been of more interest than one recently received 

 from Senor Juan X. Navarro, Mexican consul-general in Xew York 

 City. Seiior ^N'avarro wrote us at the request of the Governor of the 

 State of Michoacan for specimens of Yedalia for use against a scale 

 insect which is damaging the coffee crop in that State. We replied 

 that Yedalia was of i)ractical benefit against Icerya only, and that we 

 very much doubted whether any good could be accomphshed by sending 

 it to Mexico. We requested, however, specimens of the scale-insect 

 damaging coffee, and have recently received a number in alcohol, which 

 indicate that the species doing this damage is our common gTeen-house 

 Mealy Bug {Dactylopkis destructor). We have advised the use of the 

 kerosene emulsion spray against this important pest. 



THE HOP PLANT-LOUSE IN WASHINGTON. 



The latest advices from the State of Washington indicate that the 

 Hop Plant-louse has made its appearance in numbers upon the hop 

 vines. Hop-growers are spraying very extensively, different mixtures 

 being used. The principal are the kerosene emulsion, the whale-oil soap 

 emulsion, and the quassia decoction. A machine known as the roller 

 sprayer has been extensively used, with much success. Since the pub- 

 lication of Prof. Washburn's very satisfactory defense of kerosene emul- 

 sion, we have seen less of the opposition to this substance. 



TICKING OF THE BOOK LOUSE. 



Mr. C. J. Gahan, in exhibiting specimens to the Entomological Soci- 

 ety of London of the common Book Louse, Atropos pulsatorms Fabr., 

 stated that he had heard it making a ticking noise similar to that made 

 by the ''death watch" (Anobium). We put this on record as corrobo- 

 rative evidence of the power of making such noise possessed by Atropos, 

 which many have felt doubtful of on account of its minute size and soft 

 body covering. 



DELTOID MOTHS. 



Prof. J. B. Smith, IN'ew Brunswick, N. J., is engaged on a mono- 

 graphic revision of the Deltoid group of the Noctuidse and desires 

 material from all parts of the country. He will name and return all 



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