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Triorophus Icevis Lee. was taken at Barstow clinging to the 

 under surface of boards which were resting on the sand, August 

 19th. Trmiitys pr2d7iosa with E. globosiis, Greeley, Col. 



The species of Etiryvictopon and Emmejiastes have all \'ery 

 nearly the same habits so far as I observed, being found chiefly 

 about the roots of various plants, especially such weeds as grow in 

 thick clumps or brushes. Most Emrnenastes have a very fine bluish 

 "bloom" when living, but this is easily removed, and I never saw 

 a cabinet specimen that showed it. These remarks apply particu- 

 larly to Ell. riifipes, emarginatum and co7ivexicolle, and Em. ater, 

 acutiis, obesus and a n. sp. 



Epitragiis is not so strictly terrestrial as the preceding insects, 

 and is in the habit of climbing up the sage-brush anci resting among 

 the leaves, especially in cloudy weather. I noticed large numbers 

 oi E. canaliciilatus in the branches of sage-brush at Seligman, Ariz., 

 one very rainy and disagreeable day in late July. E. aaitiis I took 

 at Albuquerque; E. pliunbcus 2i\. Coolidge, both having the climbing- 

 habit. 



Batidiiis setosus may be found in the sand under dry cow-drop- 

 pings along the Little Colorado River near Holbrook, Ariz., in 

 company with Aphodius. It is an " early bird," appearing in April. 



Zopherus probably breeds in wood, and my series is interesting 

 as showing the replacement of one species by another at short in- 

 tervals. At Albuquerque I found Z. granicollis, and took it again 

 at Coolidge, one hundred and thirty-six miles farther west. Another 

 one hundred and fifty miles, and it gives place to Z. elegans; ninety 

 miles beyond this is replaced by Z. opacus, which in turn yields to 

 gracilis and tristis in the next one hundred miles. They all occur 

 in the immediate vicinity of pine logs, generally resting on the bark 

 of the under surface close to the ground, with the exception of Z. 

 elegans, which I took around cottonwoods, there being no pine 

 within several miles, except the ties on the railroad. 



Phellopsis var. porcata is found on old pine logs, and is very 

 hard to see on account of its brownish color and the peculiar irregu- 

 larities of the upper surface, which harmonize with the bark of the 

 tree. 



The little Arcroschiziis costipennis is sometimes seen clinging to 

 the underside of boards laid in the sand along the Little Colorado 

 River bottom. Its congener, A. armatiis, I found living with a 

 large species of ant at Green River, Wyoming, in May. They are 

 rapid runners, but feign death if disturbed. 



In the Colorado desert, near the Needles, Cal. , we find Crypto- 

 glossa verrucosa, a very fine insect. During the heat of the day it 



