NOTES ON THE GARDEN FLEA-HOPPER. 61 



Of the localities above given, all except those personally credited or 

 represented by specimens have been previously recorded and credited 

 by Dr. Uhler (1. c.) and others or have been mentioned in the preceding 

 pages. The above localities show a distribution which ranges from 

 what is known as the Gulf strip of the Lower Austral life zone to the 

 Boreal zone. There are no reasons for the belief that this species is 

 other than native to this country. 



ADDITIONAL FOOD PLANTS. 



In addition to the food plants already recorded, the following are 

 given by Mr. Webster (1. c), based on Mr. Mally's observations : Prickly 

 lettuce, Laciuca scariola; ragweed,, Ambrosia artemisiwfolia; white 

 vervain, Verbena urticwfolia; narrow plantain, Plantago lanceolata; 

 P. rugelii; self heal, Prunella vulgaris; smartweed, Polygonum liydro- 

 piperoides; mares tail, Erigeron canadense; thistle, Carduus lanceolatus; 

 sticktights, Bidens sp.; low mallow, Malva rotundifolia; yellow sweet 

 clover, Melilotus officinalis; sour grass, Oxalis stricta; Aster sp.; crab 

 grass, Panicum sanguinale. 



THE LIFE HISTORY NOT WELL KNOWN. 



This species, like many other injurious forms, is subject to consider- 

 able fluctuation in numbers in different seasons. During 1898 it 

 was extremely rare in the vicinity of the District of Columbia, only a 

 few specimens being found when sought for on clover, which appears 

 to be one of its favored host plants. It practically disappeared late 

 in September, as no bugs could be found when sought for in early 

 October. 



Mr. Heidemann has observed this species (principally on red clover) 

 in the District of Columbia as early as May, but it may occur somewhat 

 earlier, and he has expressed the opinion to the writer that there are 

 probably two generations in this latitude. He also inclines to the belief 

 that injury to potato and similar garden crops is usually in the vicinity 

 of clover fields and apt to be the direct outcome of the cutting of the 

 clover, which results in some instances in the practical withdrawal of 

 the insects 7 natural food supply, thus forcing them to attack the nearest 

 or most available crops. Mr. Webster has said tbat this species might 

 hibernate in the adult stage, although it would seem that it usually 

 passes the winter in the egg, but this is practically mere conjecture, as 

 no positive observations on these points which can lead us to generalize 

 with accuracy have been made. He has noticed its occurrence in green- 

 houses and kept specimens of the adults living in the iusectary at 

 Wooster, Ohio, during the winter. From this it is not improbable that 

 still another generation, if we can prove that two are produced out of 

 doors, might be developed in a warm indoor temperature. 



As no common name appears to have become attached to this insect, 

 the writer proposes that it be known as the garden flea-hopper. 



