32 University of Michigan 



Width of wing-band per sc is a dangerous feature in this 

 genus. Salina may be distinct, it ma)- be a geographic race 

 of zinciilata, or it may be valueless. I have been very con- 

 servative with regard to uncertain forms of this type, and 

 used vincidata until I know more definitely about the status 

 of salina/' Later the specimens were returned with the fol- 

 lowing notes: "Trimerotropis vincula\ta group. Apparently- 

 two species, but at this writing (July, 1921) do not care to 

 apply names, as it is too hazardous before intensive study." 

 The specimens agree fairly well with McNeill's descriptions 

 of salina, and are superficially very different in appearance 

 from typical vinculafa by reason of the very broad and heavy 

 wing-band. 



Trimerotropis sordida E- M. Walker.^-' ?— Stump Lake, Nel- 

 son Co., July 24, 1920, I male. 



This specimen was included with a lot of the preceding 

 species which was taken on the gravelly beach of Stump Lake, 

 among occasional clumps of grass and other herbaceous plants,, 

 and in an area about 100 yards from the shore, on sandy soil 

 covered with a thin growth of short, dry grass. 



Aerochoretiitcs carlinianus carlinianus (Thomas). — Buford, 

 July 23, 1920, II males, 5 females; Williston, July 24, 1920, 

 I female ; Amidon, Aug. 23-28, 1920, 10 males, 3 females. 



Common along the roads and in bare fields near Buford. 

 At Williston one specimen was taken on a sparsely vegetated 

 clay hillside. In the southwestern part of the state it was 

 common on the sparsely vegetated clay fiats around the mar- 

 gins of a small alkali lake on the uplands near Amidon, on 

 nearly bare clay slopes among the "breaks" of the Bad Lands, 



10 Determined with some doubt by J. A. G. Rehn. Regarding it he 

 writes : "I have never recognized this species before, and the specimen 

 may not be it. As the condition is teneral, certain discrepancies from 

 the description may thus be accoimted for." 



