1906.] NATURAL SCIENCES OF PHILADELPHIA. 389 



should be considered nothing more than a race of it. The bars of the 

 tegniina are usually somewhat narrower and the caudal tibiae not quite 

 so deep in color. The majority of the specimens have a more or less 

 distinct ferruginous or ochraceous wash suffusing the tegmina, while 

 several have the lighter sections without the same, and clear bone white 

 in color as in the pair of californica used for comparison. A pair of 

 specimens from Salt Lake Valley, received from Prof. Bruner, and 

 labelled by him T. prceclara, belong to this species. Some of the 

 specimens examined have the tegminal bars more distinct and less 

 broken into spots than others, while the width also varies as much as 

 the intensity. A female individual of this species from Salt Lake 

 City, in the collection of the Academy/^ has the tegminal bars much 

 broken into annuli. 



In nine of the specimens examined a second median bar on the lateral 

 face of the caudal femora is more or less distinctly indicated, while 

 in six it is absent or represented only by a very faint clouding. 



This beautiful species was quite common in the arid sage-brush 

 region on the outskirts of Salt Lake City and the series was taken with 

 ease. In spite of the insect's bold coloring it was most inconspicuous 

 when at rest. 



Trimerotropis montana McNeill. 



Grand Junction, Mesa Co., Colorado, Aug. 15, 10 6^, 4 9 . 



This species, if such it might be called, is very closely allied to the 

 preceding, as has been stated by McNeill." As far as the material 

 in hand goes it appears to be only a more subdued form, with the dark 

 tegminal bars broader and pale areas more ochraceous and in a measure 

 lacking the strong contrast seen in strenua. The character of the 

 median carina of the fastigium and the proportions of the pronotum 

 do not differ from the series of strenua, while the lateral face of the 

 caudal femora in the greater majority have a median band more or 

 less faintly indicated in addition to the constant subapical one. 



This species has been previously recorded from Durango and Delta, 

 Colorado, in addition to Grand Junction, as well as Boise City, Idaho^ 

 the type locality. 



These insects were taken on the banks of the Grand river, on ground 

 that had been recently inundated. The soil was sandy and clusters of 

 tall bushes grew here and there. The specimens were active and not 

 taken without difficulty. 



" Trans. Amer. Ent. Soc, XXVII, p. 333. 

 Proc. U. S. Nat. Mus., XXIII, p. 433. 

 26 



