THE CANADIAN ENTOMOLOGIST 371 



A good thing to remember in making graphic presentations 

 and one which is often disregarded by entomologists, especially in 

 their efforts to show the differences in yields between sprayed 

 and unsprayed fruit trees by means of comparative drawings, is 

 to have the presentation read from one dimension only and not 

 to use areas and volumes which are so easily interpreted wrongly 

 when quantities are represented. Inasmuch as many entomolo- 

 gists are familiar with curve plotting, no mention need be made of 

 this method here, except to advocate its greater use. As stated 

 before, this brief paper is merely suggestive, as are also the illus- 

 trations, which are not to be taken as examples, inasmuch as they 

 are far from perfect. For a complete treatise on this subject, 

 one is referred to "Graphic Methods for Presenting Facts" by 

 Willard C. Brinton, published by the Engineering Magazine 

 Company (New York City), a copy of which will be exceedingly 

 useful to the entomologist who desires to present his material 

 where possible in a convincing manner. 



SOME PYRALID NOTES. 



BY WM. BARNES, S. B., M. D. & J. MCDUNNOUGH, PH.D., DECATUR, ILL. 



In a recent number of the Insecutor (Vol. V, pp. G9 et seq.) 

 Dr. Dyar has given some valuable critical notes on the Pyraustids 

 and other Pyralids as listed in our Check List; one of our purposes 

 in pubhshing this list Avas to elicit just such new records from our 

 North American fauna as Dr. Dyar gives; without published records 

 species indigenous to the territory embraced in our list may long 

 remain unlisted, known only to a few individual curators or work- 

 ers, and we trust that others who have further new records may be 

 prevailed upon to follow Dr. Dyar's example. 



We are also pleased to adopt Dr. Dyar's references of several 

 of our apparently new species to older names given to West Indian 

 or Central and S. American material; based ^s they are on a study 

 of the large collections from this territory in the National Museum 

 they may be presumed to be correct; we had already expressed 

 the hope (Contr. II, (6) p. 223) that workers more favourably 

 situated than ourselves would endeavour to align our names with 

 those from more southerly points, and Dr. Dyar's efforts in thus 



November, 1917 



