Occasional Papers of the Mnseiiui of Zoology 31 



covered with xerophytic vegetation, and the Amidon speci- 

 mens were all taken on the nearly bare clay flats around the 

 margins of a small, shallow alkali lake on the uplands near 

 the town, with the exception of a single male which was taken 

 on a bare area of sun-baked clay soil in a dry upland pasture. 



Trimerotropis vincitlata evidently matures soon after the 

 middle of July in the eastern part of the state, since many of 

 the specimens taken between the 20th and the 25th of that 

 month were in a teneral condition, and since many last stage 

 nymphs were still present at that time. In this region this 

 species is not very active nor a very swift flier; it seems to 

 rely largely on its inconspicuous coloration for protection, and 

 is rather hard to flush. When an individual is alarmed it 

 starts uj) with a peculiar butterfly-like fluttering, which 

 soon steadies into a direct, slightly undulating flight. They 

 are usually silent in the air, but on a number of occasions 

 their stridulation was heard; it reminds one somewhat of that 

 of Trimerotropis huroniana in certain respects. The sound 

 is a short buzz, repeated at brief intervals during the flight; 

 in a flight of ten feet an individual may stridulate two or three 

 times. At every rei)etition it appears to fall a little, recovering 

 during the intervals of silence. The end of the flight is usu- 

 ally abrupt, the insect dropping suddenly to the ground in a 

 way that is often bewildering. 



What this form should be called is not clear. With regard 

 to material determined as Trimerotropis salina McNeill by 

 the author which was sent to Air. J. A. G. Rehn for verifica- 

 tion, he wrote as follows : ''Regarding Trimerotropis salina — 

 I wish we knew' more about it. W^e have topotypes which 

 came in the Bruner Collection, but the types are gone, like 

 all the McNeill types, destroyed during a lengthy illness of 

 his. . . . What salina will prove to be remains to be seen. 



