322 



REVISION OF THE TENEBRIONIDiB OF AMERICA, 



E. depressum, Lee, (Eleodes) Ann. Lye. 5, 186; (Embaphion) List of Col. X. A., p, 60. 



Iii this species the thin margin is almost totally wanting. The thorax is moderately 

 convex, one-third broaden - than long, very coarsely punctured, slightly narrower behind. 

 The sides are moderately rounded. Anteriorly rather feebly emarginate, posteriorly with 

 the middle of the base slightly prominent, angles obtuse. Elytra broadly oval, base 

 emarginate, angles prominent, sides strongly rounded, gradually narrowing to apex. Mar- 

 ginal line attaining the apex. Epipleurse limited by a very distinct elevated line. Third 

 abdominal segment placed obliquely to the second, especially evident in the males. The 

 antenna", legs, parts of mouth and last two abdominal segments, are ferruginous brown in 

 color. The elytra have rows of moderately coarse punctures, bearing short hairs, and are 

 generally more rugose than any of the preceding species. 



Tins is the most robust species of the genus, and is especially noticeable in having the 

 thorax and elytra more distant. The antennae are also shorter and stouter, and with the 

 basal joints more pubescent. 



Occurs rarely at Vallecito (Leconte), Maricopa Desert (Horn). 



Length .38-44 inch. 



In a, review of the species of Embaphion, it will be particularly noticed that there is a 

 gradual lessening of the foliaceous margin from muricatum to depressum. In consequence 

 of this, the anterior emargination of the thorax diminishes from the deep notch witb al- 

 most parallel sides, almost equalling in depth the length of the head, (muricatum) to the 

 simple broad shallow emargination so frequently seen in Eleodes. In the broadly mar- 

 gined species the thorax proper is narrow, sometimes longer than Avide, and with a dimi- 

 nution of the margin the thorax gradually widens, until, in depressum, the thorax is much 

 broader than long, and the margin almost entirely absent. The epipleural line follows 

 the same rule; almost entirely absent except at apex in the margined species, it becomes 

 more distinct until in planum and depressum the whole course is marked cither by a faint 

 groove in the one and a, distinctly elevated line in the other. In all the species except 

 planum tin; lateral margin of the elytra extends to the apex. The humeral angles of the 

 elytra proper (without the margin) are the more distinct as the acute margin is less so, 

 and in depressum the rather deep emargination of the elytra! base causes them to become 

 quite prominent. 



following these characters our species may be tabulated; 



Hind angles of thorax acute and overlapping the humeral angles of elytra. 



Body broadly margined. muricatum. 



Hind angles of thorax obtuse, not overlapping basal angles of elytra ; 

 body acutely, not broadly, margined. 



