34 GEO. H. HORN, M. D. 



This species is univei'sally mixed with bicolor iii collections, but 

 may be known by the entire absence of the tibial ridges, the dark 

 legs and by only the half of the terminal joint of the antennte 

 yellow. 



Its distribution seems to be across the northern half of our country 

 from C'anada and New Hampshire to Virginia, and from these j^oints 

 through all the States to the Pacific coast as far south as the extreme 

 north of California. 



E. arizoiieiisis n. sp. — Oval, rlistiiictly narrower behiiul, moderately con- 

 vex, black, feehly shining, clothed with very short black hair. Eyes narrowly 

 separated. Antennse black, the four basal joints ferruginous, the last joint en- 

 tirely yellow. Thorax very closely and finely punctured, the basal impressions 

 vague. Elytra striato-puuctate, the punctures moderately coarse and close, be- 

 coming finer toward the apex, but easily distinguishable from the interstrial 

 punctures, which are finer and closely placed. Prosternum coarsely and closely 

 punctured, the side pieces densely and roughly punctured and subopaque. Body 

 beneath densely punctured, the abdomen very finely. Legs black-brown, middle 

 and posterior tibiie with distinct transverse ridges bearing very short, closely 

 placed setse. Length .26 — .30 inch ; 6.5 — 7.5 ram. 



This species is the largest known in our fauna. It is rather less 

 attenuate behind than bicolor and repdiidv.s. As in bicolor the ])unc- 

 tures of the strife extend distinctly to the apex. From either (jf the 

 two species cited it differs in the roughly sculfjlured underside of the 

 prothorax. 



The eyes are a little more widely separated than in either bicolor 

 or repanclus, but the distance between the eyes is scarcely more than 

 one-third the width of either eye as seen from above. 



Occurs in Arizona and New Mexico. 



K. bicolor Fab. (Myeelophaqus), Eut. Syst. i, 2, p. 497; Syst. El. ii, p. ,566; 

 indistiiictHS Lee, Ann. Lye. v, 1851, p. 151. — Oval, convex, distinctly attenuate 

 posteriorly, black, shining, sparsely pubescent, abdomen and legs ferruginous. 

 Antennae, black, four ba.sal joints reddish, terminal joint entirely yellow. Eyes 

 very narrowly separated. Thorax shining, the punctures fine and close, but not' 

 dense, basal impressions vague. Elytra striato-punctate, the puuctures moder- 

 atelv coarse, but becoming finer posteriorly, but still quite distinct near the ape.x, 

 the interstrial punctures close, but not dense nor rough. Prosternum moderately 

 coarselv punctured, the side pieces finely and shining. Body beneath and abdo- 

 men rather densely punctured, middle and posterior tibia; with well marked 

 transverse ridges with short, closely placed setpe. Length .20 — .24 inch;. 

 5 — 6 mm. 



Some specimens collected l)y me in very early spring, in Arizona, 

 have a decidedly brownish color above, although the abdomen and 



