GROSELLE INSECTS 427 



THE LESS IMPORTANT ENEMIES 



The foregoing list includes those species which 

 have either proved themselves, or which promise to 

 be, seriously injurious. Many other species have been 

 found upon these plants which seldom do harm. Many 

 of these are general feeders, and in other cases the work 

 is of such a nature as to affect the plant but little. No 

 sharp line can be drawn between those which do much 

 and those which do little injury, for under special con- 

 ditions the ones which are normally of little impor- 

 tance may become unusually destructive. 



CLASS ARACHNIDA (Spiders and their relatives) 

 Order Acarina 



Tetranychus telarius (Linn.). Saunders, Ins. Inj. Frts. 355. The 



Red Spider, which occasionally attacks the black currant in dry 



weather. 

 Bryobia pratensis, Garman. The Clover Mite. Riley and Marlatt 



Ins. Life, 3:45. Observed on wild gooseberry, Ribes gracile, at 



Lincoln, Nebr. 

 Tyroglyphus ribis, Fitch. N. Y. Rep. 3:424. On diseased currant 



stems. 



CLASS HEXAPODA (Insects) 



Order Orihoptera 

 FAMILY ACRIDID^;. 



Melanoplus femur-rubrum (DeG. ). [Caloptenus femur-rubrum 

 (DeG.). 111. Ent. Rep. 14 (Gen. Ind. Supplement).] The com- 

 mon red-legged grasshopper. A general feeder. 



FAMILY LOCUSTID^:. 



Amblycorypha oblong i folia (DeG.). [Phylloptera oblongifolia, 

 DeG. Riley, Amer. Ent. 2:182.] Eggs occur on currant and 

 other woody stems. 



