82 MAINE AGRICULTURAL EXPERIMENT STATION. I915. 



speoies but this seems never to have been completed. I have 

 also seen a nuntber collected by Mr. H. G. Barber. 



No specimens of ^Ir. Stover's colleoting are preserved so far 

 as I learn at the Maine Station and the species deposited here 

 con9is,tedi of a small series determined by Mr. Van Duzee. 



While the present list cannot be considered as complete it is 

 probable that mosit of the more common species and a good 

 proportion of the rarer forms hav-e been secured and certainly 

 most of the Sipecies of present or probable future economic 

 importance 'have been noted. 



As compared with the New York list of 175 species it seems 

 somewhat smiall, 'but many of the more southern forms of 

 southern New York disappear, while the Adirondacks present 

 many of the boreall species. Furthermore the New York list 

 has been the result of many years of work and includes the 

 results of such specialists as Fitch and Van Duzee. 



The leafhoppers affecting the cereal and forage crops con- 

 stitute a vev}' constant factor and the extent O'f the drain on 

 such crops is doubtless very much greater than is appreciated. 

 In some estimates made by the writer these insects were taken 

 in grass land at the rate of one and a half to two millions to 

 the acre and in many instances recorded grain fields have been 

 very badly injured. (See Bui. 108 Bur. Ent. U. S. Dept. Ag.) 

 It may be stated' that no such serious devastations have been 

 noted so far in Maine but meadows and grass lands have shown 

 their presence in large numibers and of several species. Tho.se 

 most in evidence have been Cicadida 6-iiotata, Deltocephaliis 

 mimicus, Say, and configuratus Uhl, Acocephaliis striatus, 

 Draeculacephala mollipes, angulifera, and noveboracensis these 

 being discussed somewhat in detail in later pages. The drain 

 frottn these species while generally overlooked is certainly of 

 economic importance. 



The species affecting fruit and garden crops are more com- 

 mioinly noticed as for some of the species the damage is very 

 apparent. This is especiar.y true of the grape leafhopper, Typh- 

 locyba comes, which causes the whitening and withering of the 

 leaves and the apple leafhopper, Empoasca mali, which affects 

 not only apple but quite commonly such crops as potatoes, beans 

 and other garden crops. This species is common and widely 

 d'istributed in ]\Iaine and under favorable conditions for in- 

 crease might become a very troublesome pest. 



