62 Natural History Bulletin. 



longer, and as long as the three preceding ones; pubescence 

 long. Prothoi'ax transverse, oval, evenly rounded, as long as 

 the width of the head behind the eyes, and one-fifth wider 

 than long, convex; discal fovea, or abbreviated sulcus, less 

 than one-fourth of the length of the prothorax, situated just 

 before the middle; transverse sulcus one-fourth from the base, 

 deep, doubly arcuate, deeper in the middle, ending in a large 

 lateral fovea, the enclosed basal space granulated. Elytra 

 moderately convex, just visibly broader than the prothorax 

 across the high, narrow shoulders; the length of the suture is 

 one-half more than that of the prothorax; basal foveas deep, 

 sutural lines parallel, discal lines dilated towards the shoul- 

 ders, reaching one-third from the base; sides divergent, some- 

 what arcuate behind the middle. Abdomen narrower than the 

 elytra, broadly margined, with extremely short carinae on the 

 bases of the first and second segments and a mere indication 

 of them on the third. Legs rather strong and moderately 

 short. 5, fourth ventral with a fine, transverse line at the 

 posterior margin, laterally hooked; the base of the fifth is 

 transversely depressed in the middle third, and bears a trans- 

 verse linear impression behind the middle; last ventral finely 

 punctured, not carinate. 



Habitat. Linn County, Iowa. 



E. spiNiFER, Casey. Brown, impunctate, polished, pubes- 

 cence inconspicuous. Length 1.2 mm. Plate XL, Fig. iii. 

 Plate XII., Fig. 117. 



Head large, and, excluding the eyes, as long as wide, some- 

 what quadrate, sides slightly divergent, eyes moderately prom- 

 inent, tempora prominent, arcuately divergent, longer than the 

 eye ; base sinuate, with a median occipital impression ; occipital 

 fovese pubescent, moderately large, mutually two-thirds more 

 distant than either from the eye, and connected by a parabolic 

 sulcus, which is deeper behind the arcuate frontal ridge; the en- 

 closed surface is very convex; supra-antennal tubercles strong,, 

 transversely and obliquely oblong. Antennce one-half longer 

 than the head, robust, the first two joints stout; the joints of the 



