108 THE CANADIAN ENIOMOLOGIST. 



is to the labors of those eminent scientists, Prof. Momtandon 

 and Dr. Horvath, but mainly to the latter, that we owe what 

 has been done towards correcting these mistakes. Horvath's 

 visit to the United States in 1907 and the collecting he then did, 

 enabled him to make the necessary comparisons, and it is his 

 results which form the groundwork for this discussion. 



In the writings of the fathers of American Hemipterology , 

 we find much of this erroneous work, in their case most unfor- 

 tunately unavoidable owing, as already pointed out, to too great 

 reliance on colour characters alone. Thomas Say, who needs no 

 praise to establish his position as the greatest of American ent- 

 omologists, had indeed a keen and discriminating eye, and nearly 

 without exception his species and genera have withstood the most 

 rigid tests. His successors however, have not been so uniformly 

 successful, so we have for America a list of species of supposedly 

 European Heteroptera (to which in the heat and haste of Hemiptero- 

 logical youth I have added my mite), which includes such species as : 



Reduvius personatus L. 



Sciocoris lectularius L. 



Sciocoris micro phthalmus Flor. 



Nezara viridula L. 



Zicrona ccsrulea L. 



Corizus crassicornis L. 



Corizus hyalinus Fabr, 



Nysius thymi Wolff. 



Nysius ericcB Schill. 



Stygnocoris riisticus Fall. 



Sphragisticus nehulosus Fall. 



Scolopostethiis thorn soni Reut. 



Aradus crenatus Say. 



Aradiis luguhris Fall. 



Aradus cinnamomeus Panz. 



Harpactor leucosdiliis Stal. 



Gerris rufoscutellatus Latr. 



Acanthia paUipes Fabr. 



Acanthia xanthochila Fieb. 



Corixa germari Fieb. 



Corixa prceusta Fieb. 



