118 



M. communis — Schon. 



Closely resembles the last, and is not easily distinguished from itr 

 except by the size, which is not always a safe guide in this group. It 

 is rather a lighter brown than fissilis, and the thorax has a longitudi- 

 nal indentation in the middle, deepest on the anterior half. Length 

 about half an inch. 



Common, but does not appear to be so abundant in the southern 

 portion of the State as fissilis. 



Monocrepidius lividus — De G. (M. lobatus — Say.) 



General color an ash-brown, densely covered with pale, pros- 

 trate hairs ; when denuded of these the surface is brown. 

 Thorax longer than wide, minutely punctured ; the posterior spines 

 acute and ridged above. Elytra striate, with regular stitch-like punc- 

 tures, the elevated lines between the grooves flattened. Legs dull 

 yellow, with the next to the last joint of the tarsi expanded and ex- 

 tended beneath the terminal joint, and blunt or very obtusely rounded 

 at the tip. The last character is its chief distinguishing feature. 

 Length half an inch. 



Found in abundance in Southern Illinois, and I presume also in the 

 Central and Northern portions. 



Melanctes morio — Fabr. 



The entire surface of this insect is of a shining black color ; the 

 mandibles have a reddish tinge in the middle and are toothed at the 

 tips. The head and thorax minutely and indistinctly punctured ; 

 head slightly depressed. Thorax convex in front, flattened behind; 

 the posterior angles strongly spined. Scutellum oblong and rounded. 

 Elytra apparently smooth, marked with regular rows of fine punc- 

 tures. Underside a polished black. The tarsi lined beneath with a 

 row of yellow hairs. 



Length one inch and a quarter; width three-eighths of an inch. 



Agriotes mancus. 



Clypeus truncated ; body punctured; thorax with an impressed line 

 behind the middle ; posterior angles slightly excurved. 



Body black, punctured with short hair ; head with large profound. 

 dense punctures ; clypeus elevated, emarginate each side near the 

 antennae, and truncated before; antennae and palpi rufous ; thorax 

 Avith an impressed line behind the middle ; punctures numerous, pro- 

 found, equal to those of the head, but not so dense; posterior angles 

 prominent, very slightly excurved, carinate above, posterior edge 

 slightly bidentate near the middle; an elevated abbreviate line on 

 the posterior margin near the lateral carina ; scutel entire at base ; 

 elytra have the punctures of the striae oblong and approximate; in- 

 terstitial linos with minute punctures furnishing hairs; feet reddish. 



Length seven-twentieths of an inch. Inhabits Missouri. 



