MAINE AGRICULTURAL EXPERIMENT STATION. 9 



the beetles emerging and attacking new trees. As these beetles 

 live in forest trees, orchards near timber are more liable to 

 become infested. 



In some localities good results have been reported from the 

 use of a wash made of 3 gallons of water, 1 gallon of soft soap 

 and \ pint of carbolic acid, applied in June. The object is to 

 have the liquid soak into the burrow and destroy the fungus 

 upon which the beetles depend for food. Two or three applica- 

 tions at intervals of a few days seem advisable. 



b. SCALE INSECTS AND PLANTLICE. 

 Oyster-Shell Scale. 

 {Lepidosaphes ulmi.) 

 This scale, which resembles an elongate oyster shell in shape 

 (fig. 3, b) has long been known in this country, though believed 

 to be a native of Europe. It is widely distributed and is ex- 

 ceedingly abundant in Maine. Besides seriously injuring apple 

 trees, the twigs of which often densely covered by them, they 



Fig. 3. Oyster-shell Scale, a, female scale from below, showing 

 eggs; b, same from above greatly enlarged; d, male scale enlarged; 

 c, female scales on twig, natural size; e, male scales natural size. (From 

 year book, 1894 U. S. Dept. Agr.) 



