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INJURIOUS INSECTS OF 1904. 



IDENTIFICATION OF INSECTS. 



Some of the principal inquiries regarding insects received through 

 the mail during the past year are here listed. Plant lice began to be 

 heard from early in May, and wire worms, the larvae of "Click 

 Beetles," evidently caused trouble in May and June. Cut worms, 

 beginning their depredations about the middle of June, were heard 

 from through the summer as late as August 6th. The cabbage root 

 maggot was the cause of numerous letters from June loth; and from 

 August 1 2th to September 7th we had our usual quota of green cab- 

 bage worms. About the middle of August some complaints of grain 

 plant lice in wheat reached us, but this insect caused no special injury. 

 Complaints of Cottony Maple Scale, which has been very abundant 

 this summer, reached us through the mail from Hennepin, Ramsey 

 and Cottonwood counties, besides being observed by the writer in 

 Rock county. The Chinch Bug and Hessian Fly, the reader will 

 observe, are this year conspicuous for their absence though men- 

 tioned in one or two instances. We append a map of the state show- 

 ing the counties. From one to several inquiries came from each 

 countv marked bv an X. 



DATE. 



COUNTY. 



Mar. 



Mar. 



Mar. 



Mar. 



Mar. 



Apr. 



Apr. 



May 

 May 

 May 



May 



May 

 May 

 May 

 May 



May 

 May 



Ramsey. . . 

 Hennepin. 

 Hennepin. 

 Hennepin. 



Rice 



Brown 



Wilkin.... 



Hennepin. 



Stearns 



Goodhue. . 



Rice. 



Douglas. 

 Ramsey. 

 Renville. 

 Dodge. . . 



Becker. 



INSECTS IDENTIFIED. 



HOST PI,ANTS, ETC. 



Buffalo Moth, A. scrophnlaiia: — 

 Linn 



Mites, Tyroglyplius longior — 

 Gervais 



Staphylinid 



Ramsey Wire Worm 



Apple Bark Louse, M. pomoruin 

 — Bouche i 



Oyster-shell Bark Louse, M. po- 

 moruin — Bouche 



Scurfy Bark Louse, Chionaspis 

 furfurus — Sign 



Cecropia Moth, Attacus cecropia 

 ■ — Linn 



Plant Lice 



Lachnosterna 



Scurfy Bark Louse, Chionaspis 

 furfurus — Sign 



Lecanium 



Aleurodes 



Lice, Aphis niali — Fab 



Wire Worms 



Scolytid borers, also Atxnius 



Cattle Louse, T. scalaris — 

 Nitzsch, 



White Scale, Aspidiotus nerii 



Woolens. 



Flour mill. 



Supposed by correspondent to 

 injure radishes. 



Lilac. 



Transcendent Crab. 



Apple tree. 



Cocoon. 



No specimens. 



Corn fields. No specimen. 



Oleander. 

 Potted Plants. 

 Apple. 

 Asparagus. 



Live Stock. 

 Oleander. 



Asparagus. 



