356 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



iug. It was common in most places away from the mountains, but less 

 common in Clear Creek Canon, in tlie Ute Pass and adjoining gulches, 

 and in the CaSon of the Arkansas. Specimens were to be seen along the 

 route from Baltimore all the wa,y to Kansas City ; while in Eastern 

 Kansas it seemed to be more abundant than anywhere else. On the . 

 treeless plains, it and all other large flying insects, excepting the grass- 

 hoppers and dragon-flies, ceased to appear until we reached the vicinity 

 of water and cultivated lands, when it was again seen on the wing, fly- 

 ing with its wonted vigor. 



In the Clear Creek Canon and adjactent gulches, the large and showy 

 Pairilio daunus Boisd. was flying rapidly and agitatedly over the water, 

 as if seeking for a plant upon which to deposit its eggs. One specimen 

 was also noticed in the Ute Pass on August 13. All of them were too 

 restless to admit of capture, and at no time were they within reach 

 of my net. At the same time and in the first-mentioned place, Fieris 

 oleracea, Vanessa antiopa, Limenitis weidemeyeri in very fresh condition^ 

 a large Argymiis, Colias eurytheme, and a small Melitwa, were either seen 

 or captured. A very fine large Satyrus was tolerably common in Bea- 

 ver Brook Gulch, and another species occurred in the gulch near Mani- 

 tou. Colias eurytheme and Fieris protodice were abundant near Denver 

 and even in the city, flying upon the flowers of an Euphorbiaceous plant 

 which bears leaves margined with white. 



Mothing was conducted with success in the station at the mouth of 

 Beaver Brook, and, but for my short stay, great numbers and many 

 species of Geometrids and other Heterocera might have been readily 

 acquired. 



Coleoptera of many species were readily taken both on the plains and 

 in the mountains. Several kinds, such as Epicauta ferruginea Say, 

 Cicindela punctulata Eab., ChauUognathus hasalis Lee, Eleodes obsoleta 

 Say, and Asida opaca Say, were found in almost all places on the plains at 

 a short distance from the mountains. The former occurred in large num- 

 bers upon the flowers of Beliantlms and other plants with yellow 

 ' flowers, although in a few cases it was met with upon the white blos- 

 soms of the Euphorbia. Cicindela punctulata was common upon black 

 muddy patches in Beaver Brook Gulch and in Clear Creek Canon. It was 

 very variable, and generally of the greenish color, with the white spots 

 and lunules large. Specimens seen in and around Denver were all of the 

 black-bronze type, with very small white markings. Those of the alka- 

 line soils of the region near Canon City were the most brilliant and 

 highly metallic in their color. Cicindela pulclira Say was found singly 

 upon blackish sand near the Arkansas River, August 11, at a distance 

 of about one-half of a mile from the mouth of the Great Caiion. It 

 was very wary, and of the variety with scarcely perceptible markings. 

 Chauliognatlms hasalis Lee. was quite common upon sunflowers, chiefly 

 upon the plains and near the foot-hills. It seemed to furnish about two 

 distinct types, both of form and marking, the former having varieties 



