30 THE CANADIAN ENTOMOLOGIST. 



NOTES ON THE GENITALIA OF HALISIDOTA HARRISII, 



WALSH. 



P,Y HARRISON G. DYAR. WASHINGTON, D. C. 



I see by Mr. Lyman's address (1899) before the Entomological 

 Society of Ontario that he is a convert to the view of the specific dis- 

 tinctness of Halisidota tesselaris and II. Harrisii. I believe this to be 

 correct. 



When I last referred to the genitalic differences of these species, I 

 expressed a possible doubt that the apparent differences might be found 

 evanescent in a large materia). Having just examined 74 prepara- 

 tions, I do not find this to be the case. In tesselaris the upper 

 point of the side piece is free from the outer lobe and projecting (fig. 2) ; 



in Harrisii this point is concealed behind the lobe and pressed close to it 

 (fig. 1). The differences are small, but readily perceptible. The 

 preparations were made from two bred tesselaris and three bred Harrisii ; 

 afterward 69 captured examples were examined. These were a part 

 of the specimens from Poughkeepsie, N. Y., recorded in Insect Life, 

 and they proved to be 96% tesselaris. The total number captured should 

 therefore be approximately 2.570 tesselaris and 106 Harrisii. Harrisii 

 is evidently considerably the rarer species of the two. 



REFERENCES. 



1862. Harris, Ins. Inj. Veg. (Flint), 364. 



1863. Walsh, Proc. Boston Soc. Nat. Hist., IX., 2SS. 

 1S64. Walsh', Proc. Ent. Soc. Phil., III., 413, 430. 

 1891. Dyar, Ins. Life, III., 324. 



1891. Dyar, Psyche, VI. , 162. 



1892. Dyar, Can. Ent., XXIV., 306. 



1900. Lyman, 30th Ann. Rep. Ent. Soc. Ont., 25. 



