8G NORTH AMERICAN 



eleventh longer, conoidal. Prothorax widest at the anterior third ; sides 

 rather strongly arcuate anteriorly, much less strongly so posteriorly, dis- 

 tinctly wider than the head ; disk one-fourth longer than wide, moderately 

 convex, very minutely remotely and scarcely perceptihly punctulate through- 

 out, bifoveate before the base on each side. Elytra at the base very slightly 

 wider than the pronotum, widest in the middle where together they^re four- 

 fifths wider than the pronotum ; sides rather strongly and evenly arcuate 

 throughout, gradually convergent to the apex which is rather acutely 

 rounded ; disk convex, very minutely sparsely sub-asperately and feebly 

 punctate, mutually feebly and, narrowly elevated along the suture more 

 especially toward the base ; humeri not prominent. Legs slender; femora 

 distinctly clavate toward tip ; posterior trochanters very long, corresponding 

 coxae widely separated ; first ventral segment as long as the next three 

 together, two to five very short, eqiial in length, sixth longer, transversely 

 lunate ; pygidium exposed, as wide as long, shining, impunctate ; first joint 

 of the posterior tarsi nearly one-half lo'nger than the second and as long as 

 the fifth, third and fourth shortest, equal. Length 2.2 mm. 



Arizona (Morrison), 2. 



This species differs from LeConte's Microstemmfi f/ross(t in tiie 

 shape and punctuation of the proiiotum, in the strncture of the an- 

 tennae, and in size. 



E. puiictatlis n. sp. — Form rather slender. Color of body and antennae 

 very dark rufous, legs slightly paler and more flavate ; pubescence evenly 

 distributed throughout the upper surface, rather fine, moderately long and 

 sparse, pale fulvous in color, sub-recumbent ; integuments very higlily 

 polished. Head rather small, from the antennae distinctly shorter than wide, 

 rectangular ; sides parallel and very feebly arcuate ; base truncate, posterior- 

 angles right and rather feebly rounded ; eyes small, at the anterior angles, verV 

 slightly prominent anteriorly ; interocular surface very broadly convex, very 

 minutely and sparsely punctulate throughout ; apical margin feebly and 

 angularly produced and declivous in the middle between the antennae; the 

 latter very slender, strongly geniculate, as long as the head and prothorax 

 together, club elongated and very slender, first joint slightly shorter than 

 the next two together, ninth about as thick as the first, much longer than 

 wide, as long as and but slightly thinner than the tenth, eleventh thickest, 

 elongate, conoidal, obtusely acuminate at the immediate apex, proportional 

 lengths of the joints nearly as in reslalis; last joint of the maxillary palpi' 

 very short, broader than long, obtusely angulate. Prothorax widest at 

 slightly less than one-third its length from the apex where the sides are 

 somewhat angularly rounded and thence very strongly convergent and 

 slightly arcuate to the apical angles, and very slightly convergent and 

 nearly straight to the base ; the latter longer than the apex and more than 

 two-thirds as long as the pronotal width ; disk convex, even, slightly less 

 than one-fourth longer than wide, finely rather feebly densely and evenly 

 punctate, not foveate along the base but narrowly and feebly eroded. Elytra 

 at base very slightly wider than the pronotum, widest in the middle where 



