24 University of Michigan 



the Xational Collection at Ottawa ; three paratypes, same data, 

 in Downes' and in my collection. 



Labeled by Downes "hazel, alder, birch, choke cherry," the 

 food plant being doubtless one or more of these. This form is 

 closely related to borealis Parshley, to which it runs in Gib- 

 son's key and from which it is to be distinguished by the fol- 

 lowing characters : apical band of hemielytra without clear 

 areoles {borealis has three almost entirely hyaline) ; paranoial 

 spot very faint or absent; lateral carinae smaller and termin- 

 ating farther from base of hood; median carina a little lower; 

 discal elevations less suddenly declivous posteriorly. 

 C orythncha piira Gibson. 



B. C.— Kelowna, May 17, 1917 (M. H. R.). 



Taken on wild sunflower. The sixteen specimens of this ser- 

 ies agree well with the original description and with a typical 

 example which I owe to Gibson's kindness. The areoles of the 

 hood vary a little in size, but are usually somewhat larger than 

 those of the paranota. The height of the hood is also slightly 

 variable, occasionally reaching twice the height of the median 

 carina. In some examples a faint yellowish tinge is to be 

 detected in the regions occupied in other species by the apical 

 and basal hemielytral bands. 

 Physatoclicila variegata Parshley. 



Parshley, Tingidae N. E., Psyche, Vol. 23, 1916, p. 166. 

 Osborn and Drake, Notes Tingidae, Psyche, Vol. 24, 1917. P- is6. 

 Van Duzee, Rept. Hem. Giffard, Proc. Cal. Acad. Sci., (4), Vol. 7, 1917. P- 

 260. 



B. C.— Vernon, Apr. 20, 1915 (M. H. R.). 



With regard to remarks to be found under the second re- 

 ference given above, it may be said that Uhler and Heidemann 

 were acquainted with but one of the forms to which, in gen- 

 eral. Say's description of Tingis plexus (Compl. Writ., Vol. i, 

 pp. 349-350) might be considered to apply, this form being the 



