17 



5:*. AllyguH sp.— This prettily marked leaf-hopper is very partial to Chenopodium al- 

 lium, on the under side of the leaves of which it breeds throughout the summer. 

 This insect also attacks other species of the same genus, those of the genera Ama- 

 rantus and Montilia, etc. Besides these it is very frequently found on the beet. 

 Characteristic marks of its presence are the rather large purplish spots that are seen 

 upon the leaves of plants that have been punctured by its beak. 



54. Erythroneura sp. — Another small, slender, green leaf-hopper that is occasionally 

 met with upon the beet. 



55. Afhysanus (? sp.). — Still another of these leaf-hoppers that is found upon the beet. 



56. Liburnia intertexta. — There is still a sixth of these leaf-hoppers that has been taken 

 on the beet here in Nebraska; and which presumably also does some injury to that 

 plant by sucking its juices. 



57. Aphis atriplicis, Linn. — Mr. T. A. Williams tells me that he has taken this plant- 

 louse on the beet at Ashland, this State, where it was quite common during the 

 year. 



58. Aphis cucumeris, Forbes. — This past summer Mr. Williams also took what he de- 

 termined to be the Aphis cucumeris, Forbes, breeding quite abundantly upon some 

 beets that grew right by the side of some cucumber vines that had been infested 

 by the same insect. 



59. Siphonophora pisi, Kalt. — The same gentleman tells me that he has also taken the 

 common garden aphid here at Lincoln, on the beet. He found it in the pupa and 

 winged stages. 



Species that attack the Hoot. 



COLEOPTERA. 



60. Ligyrus gibbosus, De G. — This beetle has been quite destructive to the sugar beet 

 over limited areas towards the western part of the State during the present season. 

 It attacks the root, into which the mature insect gnaws great holes, sometimes 

 entirely imbedding itself. It worked most on old ground and where irrigation was 

 resorted to. It worked on the roots from the surface to a considerable depth but 

 most at about 3 or 4 inches below the surface. In some instances it reached a depth 

 of fully 7 inches below the surface. 



61. Lachno sterna fusca, Froh. — Not unfrequently the common white grub attacks the 

 roots of the beet, and does injury to the plant in that way. There are very likely 

 several kinds of the "grub" that are concerned in these attacks, since almost every 

 locality has its particular species of " June bug " that predominates in numbers. 



62. Wire Worms. — Several of the larvae of " snapping beetles," or click beetles, are 

 also to be charged with injuring the roots of beets in some localities. 



63. Unknown larva. — On two different occasions duriug the past summer I found beets 

 that had been attacked by some unknown larva just below the surface of the 

 ground, and from which the depredator had already escaped. The work resem- 

 bled that of an insect that works in the roots of different "tumble weeds" and 

 causes tbem to break off. The larva; are rather short, thick, whitish grubs with 

 brownish heads, about one-fourth of an inch in length, slightly largest in the mid- 

 dle ; possibly the larva of some snout beetle. 



UNCERTAIN. 



64. Silpha opaca, Linn. — This insect has been taken several times by me in beet fields, 

 and in gardens where beets were growing. In Europe the insect is said to be quite 

 injurious to the beet crop, by attacking and devouring the leaves. Whether or not 

 it has the same habit in this country I can not say. 



In addition to the above list of insects that are known to actually 

 attack one or the other varieties of beet there are several others that 

 25910— Bull. 23 2 



