TROCHOBOLA. 99 



Museum) ; Trenton Falls, N. Y. ; Maine (Packard) ; Massa- 

 chusetts (Scudcler) ; Orange, N. Y. 



This species is somewhat variable in its size, the intensity of 

 the coloring, and the distinctness of the spots on the wings. I 

 possess a specimen from Fort Simpson, H. B. T. (Kennicott), 

 which is altogether brownish ; the thorax is brown, somewhat 

 yellowish sericeous above, without any apparent stripes ; halteres 

 brownish, pale at the basis only ; the ocellate spots on the wings 

 are the same as usual, but much darker and somewhat broader, 

 thus imparting a darker coloring to the whole wing. The Euro- 

 pean T. annulata Lin. (imperialis Loew, Linn. Entom. Y, p. 

 703, Tab. II, fig. 14-15) is hardly more distinct from T. argus, 

 than some of the varieties of the latter are one from another. 

 A closer observation will have to teach us what to make of these 

 modifications of the same typical form. 



