INSECTS OF ACACIA AND ALDER. 11 



Xyloryctidaj. 



Cryptnph^iga ruhriginosn: Australia; bores in twigs. 



Tortricidae. 



Argyroploce illcpida YinhX.; Australia; India; Ceylon; Africa; attacks seed pods of Acacia /arncsiana 



HYMENOPTERA. 

 Formicidae (sens. lat.). 



Camponnlus Ugniperda Latreille: an ant; Europe; attacks living wood. 



LITERATURE. 



SOR.^UER, P. Handbuch dor Pflanzcnkrankheiten, 3d cd,, 1913, vol. 3. 



Feogg.\tt. Australian Insects. 



LiNDiNGER. L. Die Schildliiuse (CoccidEe), 1912. 



Fern.'VLD, Mari.v E. Mass. Agr. Exp. Sta. Bull. SS, 1903. 



ALDER. 



(Alnus spp. Family Betulacese.) 



Hardy ornamental trees and shrubs grown in Asia, Europe, North America, and 

 South America. Alnus rubra is the most important timber tree. The genus is not 

 attacked by many very serious pests, but any of the wood borers, especially, might 

 become serious when transported to another country in nursery stock. Several 

 pests have gained admission to the United States in some manner. These are indicated 

 by an asterisk. 



A. AN ALDER PEST LIKELY TO HE IMPOUTED. 



Coleophora luscedinella Zoll. 



(Alder Bud Moth. Elachistidse; Lcpidoptera.) 



Host: Alder. 



Injury: Attacks buds and foliage. 



Description and biology: Adult moth with wing expanse 10-13 mm., forewings dark 

 brownish gray, in the male with a little yellowish; hind wings dark gray. Egci over- 

 winters in buds. Larva chocolate brown, head and thoracic shield black; third and 

 fourth pairs of prolegs rudimentary. Feeds in buds and on foliage. Pupates in case. 



Distribution: Germany. 

 NtJssLiN, Otto. Leitfaden der Forstinsektenkunde, 2d ed., 1913. p. 433. 



B. OTHER IMPORTANT ALDER PESTS. 



AGAR IN A. 

 Eriopliyldae. 



Eriophyes laevis Nalepa, a blister gall mite; England; on leaves of Alnus glutinosa. 



ORTHOPTERA. 

 Acridiida!. 



Podisma alpina KolL, a green grasshopper of the mountain sections of Europe, Amur, and Japan; 

 very destructive at times. 



HEMIPTERA. 

 Psyllidae. 



Psylla alni Linna:us, a sucking bug; Germany; breeds on the leaves. 



Coccidae. 



Phenacoccus aceris Signoret; Europe; attacks Alnus glutinosa, and A. incana. 



Pulvinaria bctulae alni Douglas; England; attacks Alnus glutinosa. 



Lecanium caprae Linnaeus; England. 



XecoriittTO corni Bouch(5; Europe; ^tiduCks Alnus incana. 



Lecanium coryli Liimseus; Europe; attacks A. glutinosa and A. incana. 



Chionaspis salicis Linneeus; Europe, Egy^Jt; attacks Alnus glutinosa, A. incana, and A. viridis. 



Hemichionaspis sp.; Japan. 



Aspidiotis ( Targionia) alni Marchal; France; attacks Alnus glutinosa. 



