1906.] NATURAL SCIENCES OF PHILADELPHIA. 387 



This species was found in rather bare mountainous sections and on 

 the formation about the larger Yellowstone geysers. 

 Trimerotropis monticola Saussure. 



i\Iammoth Hot Springs, Yellowstone Park, Aug. 5, 1 ? . Summit 

 of foothills. Mammoth Hot Springs, Aug. 5, 1 c? . 



These specimens agree quite well with Nebraska, Colorado and 

 Wyoming specimens in the collection of the Academy. The specimens 

 examined present considerable variation in the length of the tegmina. 



This appears to be the first record of the species north of Colorado, 

 except Tie-Siding, Wyoming, from which locality Gillette has recorded 

 it. 



These specimens were taken in the more hilly portions about the 

 Mammoth Hot Springs, where, on account of the character of the 

 country, they were captured with difficulty. The individuals fly 

 swiftly and for long distances when alarmed. 



Trimerotropis praeolara McNeill. 



Grand Junction, Mesa Co., Colorado, Aug. 15, 5 cJ*, 1 9 . 



This species has the fuscous band of the wing very broad, slightly 

 more than one-third the length of the same, and well continued around 

 on the caudal margin, while the spur is almost absent, the disk very 

 pale greenish yellow, and the apex hyaline except for the infuscation 

 of some of the veins. 



The fight base color is almost bone white in some specimens, and 

 distinctly washed with rufous in others. 



This species is known only from Salt Lake, Utah, and Sidney, Ne- 

 braska, in addition to the locality here given. 



Among the bushes growing in the silt deposit along the banks of the 

 Grand river these specimens were secured. The species was by no 

 means as plentiful as T. montana, which was found in the same locality. 



Trimerotropis laticincta Saussure. 



Colorado Springs, Colorado, Aug. 17, 6 o^ , 5 ? . Knob Hifi, Colorado 

 Springs, Aug. 18-22, 7 d", 4 9 . 



This series exhibits considerable variation in the intensity of the 

 bands of the tegmina, and in the shade of the light basic color. In 

 some the latter is decidedly reddish, in others pale yefiowish, and in 

 the majority dull ochraceous. The caudal tibiae are more orange in 

 some specimens than in others, and the pronotum varies from dull 

 ferruginous through warm browns to dull olive, and in one specimen dull 

 blackish-brown. 



As far as can be determined from the material in hand Scudder's 



