2,0 Unizcrsity of Michigan 



and distinct, but in a few specimens reduced to a faint trans- 

 verse shading and in others to an aggregation of fuscous spots ; 

 in several of the most intensively colored specimens a faint 

 but easily distinguishable apical band present, but this is rep- 

 resented in most cases by scattered fuscous punctations. JVinys 

 with the wing-band varying in breadth from one-quarter to 

 one-third the length of the wing from base to apex ; taenia 

 of the wing-band reaching from one-third to one-half the 

 distance to the base. Hind femora yellow within, with a red- 

 dish suffusion strongest basally ; the inner surface crossed by 

 a distinct distal black band, a continuation of that on the 

 outer face, but the two proximal bands described by McNeill 

 represented in most of the specimens by a diffused infuscation 

 of the basal half, strongest distally ; the outer face crossed by 

 a distinct subapical band, often with an infuscation extending 

 from it proximad ; a few specimens with indications of a sec- 

 ond, median band on the upper surface and upper half of the 

 pagina. 



Trimerotropis vincnlata Scudder? — Devils Lake, Aug. 8, 

 1919, 1 male, 1 female; July 20- Aug. 17, 1920, 62 males, 56 

 females, 2 juveniles; Stump Lake, July 24-25, 1920, 6 males, 

 9 females; Williston, July 24, 1920, 3 males, 5 females; Ami- 

 don, Aug. 23, 1920, 9 males, 7 females. 



This species was found in great abundance on the dry Hats 

 bordering the lakes in the Devils-Stump Lake region. It was 

 most numerous among the sparse vegetation of the middle 

 flats, between the bare sandy or gravelly beach and the taller 

 vegetation of the upper portion of the flats. Though most 

 common in this type of habitat, it was also found in smaller 

 numbers in dry pastures in the vicinity of the lakes, especially 

 in the areas of more scanty vegetation. At Williston a num- 

 ber of specimens were collected on dry clay slopes sparsely 



