OP PHILADELPHIA. 109 



This insect is not uncommon in the Atlantic States, and is also 

 found west of the Alleghany Mountains. 

 [A true Monocrepidius. — Leg.] 



4. E. RECTiCOLLis. — Pale testaceous, hairy ; head blackish ', 

 lateral thoracic edge rectilinear. 



Inhabits Missouri. 



Body pale testaceous, with short dense hair : head blackish- 

 piceous : antennge pale : clypeus rounded : thorax lateral edge 

 rectilinear from near the anterior angles to the tip of the poste- 

 rior ones : elytra profoundly striate, punctured : feet whitish. 



Length one-fifth of an inch. 



[Belongs to Adrastus. — Leg.] 



5. E. OBESTJS. — Brown, with yellow hair ; thorax convex; body 

 short, somewhat dilated. 



Inhabits Missouri. 



Body reddish-brown, with yellowish hair and [169] very 

 minute punctures : head and thorax with polished yellow hair, 

 and numerous exceedingly minute punctures ; posterior angles 

 prominent, excurved : scutel rounded hairy : elytra with scattered 

 hairs, and obsoletely punctured striae ; interstitial spaces slightly 

 convex and with minute punctures : feet rufous. 



Length two-fifths of an inch. 



[Unknown to me; it is afterwards (Trans. Am. Phil. Soc._^6, 

 168,) stated to have the ungues strongly toothed. Cardiophori 

 with this character are known, but none have yet been found in 

 the United States. 



6. E. ERYTROPUS — Reddish-brown, or blackish, punctured, 

 hairy ; posterior thoracic angles carinated ; interstitial elytral 

 lines punctured. 



Inhabits Missouri and Pennsylvania. 



Elater erytropus Melsheimer's Catalogue. 



Body reddish-brown, or blackish, with numerous short prostrate 

 yellow hairs ; punctured : head with large, profound, approxi- 

 mated punctures : antennae rufous : clypeus rounded, entire : 

 thorax with large confluent punctures on each side, and small 

 more distant ones on the posterior disk, much smaller than those 

 of the head ; posterior angles not excurved, but nearly rectili- 

 near with the posterior half of the lateral edge of the thorax, 

 1823.] 



