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JOURNAL 





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Vol. XXVII. June-September, 1919. Nbs. 3 and 4 



NOTES ON THE PLUSIIN^, WITH DESCRIPTIONS 

 OF NEW SPECIES AND RACES. 



By Rodrigues Ottolexgui, 

 New York City. 



In 1902 it was my privilege to publish a brief monograph of this 

 group, accompanied by illustrations of fifty-eight species. 1 These 

 illustrations were half tone reproductions from photographs of the 

 insects themselves. None but those that have tried to do this, know 

 how difficult and how unsatisfactory it is, if one aims to produce per- 

 fect results. In the hope of having the wings in perfect focus, the 

 specimens were freshly mounted shortly before photographing. To 

 avoid shadows, tiny bits of cork were pasted on glass and the speci- 

 mens pinned in place, the transparent glass thus avoiding a back- 

 ground that would receive shadows. The photographs were good, but 

 far from perfect, and when the half tone plates were made, and then 

 printed the results left much to be desired, I myself finding it diffi- 

 cult to determine some closely allied species from the illustrations 

 alone. It has not surprised me therefore to find some of the species 

 then described as new, and figured, still proving to be confusing to 

 even good entomologists. 



During the past five years, therefore. I have been engaged in pre- 



1 See JOL'RNAL OF THE NEW YoRK ENTOMOLOGICAL SOCIETY, Yol. X, pp. 

 56--/. 



117 



