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2 THE CANADIAN ENTOMOLOGIST. 



in the third, but well marked in one from Oregon ; while in one specimen 

 there is a very obvious frontal impression, much like that in this verti- 

 calis. In both species the head is transversely impressed posteriorly, 

 and the pygidium concave with a much raised hind border. 



Aphod'ncs inarginatus Lee. This fine species was described from a 

 unique, and by Dr. Horn in his monograph, from the type and another 

 specimen, both from eastern Nevada, and supposed to be females. 

 Through the favor of Mr. Cockerell, who collects in Custer County, 

 Col., at elevations of from 6,000 to 8,000 feet and upward, I have a speci- 

 men that appears to be a male. It differs from the type by having the 

 front distinctly tri-tuberculate, and a fine basal thoracic marginal line 

 evident at the middle, but obsolete near the sides ; the punctulation of 

 the thorax and elytral intervals is exceedingly fine, and cannot be seen 

 by the unaided eye ; there are large coarse punctures disposed in clusters 

 along the sides and base of the thorax, but absent from a large triangular 

 space on the disk with its apex posterior ; also a depression or concavity 

 at the front as well as the hind angles. 



Ligyrus relidus Say. Walking on the river beach in August, I turned 

 over a shingle on a small sandy place about which some grass was grow- 

 ing, under it were seven Harpalus caliginosus, and the elytra and other 

 remains of several L. relidus which they had devoured. Noticing the 

 sand to have been much disturbed I dug down and soon turned out 

 twenty-seven of the beetles named, which were buried from two to four 

 inches deep over an area of about ten by sixteen inches, and of both 

 sexes. Other similar spots were investigated without results. Now is 

 this a known and common habit? What is its purpose in the economy 

 of the insect ? Did the Harpahis kill those they feasted upon ? Z. 

 relidus, also Chalepus trachypygus and an occasional Polymoechus 

 brevipes come to the electric lights in the city, but relidus flies also by 

 day in the warmest sunshine, especially along the river. 



Leptura haematites Newm., nana Newm., exigua Newm., sauda 

 Lee, subargentata Kirby, similis Kirby, ruficeps Lee, and rhodopus Lee. 

 These names have long been a source of perplexity to collectors and of 

 no little confusion. Dr. Horn ( Entomol. American i., 8) recognizes only 

 three species, haematites, exigna and subargentata, placing five others 

 in synonymy — nana and saucia with exigna, and rhodopus, ruficeps and 

 similis with subargentata. This leaves a very common species here and 



