395 



associated with leaf- hoppers [Empoasca mali]. In all cases Bordeaux 

 mixture gave better results than Black Leaf 40 and seems to act as a 

 decided repellent to leaf-hoppers, though further investigations are 

 required to prove this. 



MosHER (E.). Notes on Lepidopterous Borers found in Plants, with 

 special Reference to the European Corn Borer. — Jl. Econ. Entom., 

 Concord, N.H., xii, no. 3, June 1919, pp. 2.58-268, 4 figs. 



This paper is intended to aid in the determination of the European 

 Corn Borer [Pyrausta nubilalis] and includes keys to, and descriptions 

 of the larvae of the Lepidopterous families likely to be found in 

 searching for it, 



Zetek (J.). Notes on some Insect Pests of Costa Rica. — Jl. Econ. 

 Entom., Concord, N.H., xii, no. 3, June 1919, p. 269. 



The insect pests of Costa Rica include several species not yet 

 recorded from the United States, and it is urged that all possible 

 precautions should be taken to avoid their importation. Especial 

 attention is directed to Aleurocanthus woglumi, Ashby (spring citrus 

 whitefly), which probably occurs all through Central America and 

 Tropical South America and is found in great abundance on various 

 species of Citrus in Costa Rica, where it is believed to be an imported 

 pest from the Caribbean Islands. Its food-plants are very numerous 

 and include various species of Citrus, mango, star-apple, cashew apple, 

 papaya, chirimoya, mamniee, plantain and coffee. Lepidosaphes heckii, 

 Newm. (purple scale) and sooty mould are also extremely abundant 

 on leaves and fruit of citrus. 



RJiabdocnemis obscura, Boisd. (Hawaiian sugar-cane borer) is found 

 in abundance on banana stumps and cuttings, and might be very 

 easily introduced into the United States among banana leaves used 

 for packing. 



A number of Lepidopterous larvae and pupae were found under the 

 bark of logs stacked ready for shipment. The majority of this timber 

 was infested with several species of borers, but as these have not yet 

 been identified, their importation may not necessarily mean the 

 estabhshment of a pest new to the United States. 



Sturtevant (A. P.)- U.S. Bur. Entom. A Source of Confusion in 

 Diagnosis of the Nosetna apis in Adult Bees.— J?. Econ. Entom., 

 Concord, N.H., xii, no. 3, June 1919, pp. 269-270. 



Attention is called to the fact that all material intended for diagnosis 

 of diseases in adult bees should be treated with iodine solution after a 

 prehminary microscopic examination in order to prevent confusion in 

 identification between Nosema apis and starch grains found in the 

 intestinal contents of bees. 



Hawley (I. M.). A Note on Temperature in Relation to Sciara copro- 

 phila, Lintner. — Jl. Econ. Entom., Concord, N.H., xii, no. 3, June 

 1919, p. 271. 



Experiments made to test the relative growth of beans at different 

 temperatures were interfered with by an outbreak of Sciara coprophila, 

 (C588) 02 



