AMERICAN COLEOPTERA. 295 



longer than wide, sides feebly arcuate and slightly narrowing to apex which 

 is obtusely truncate, margin rather wide and very distinctly rcflexed. Body 

 beneath rather densely and coarsely punctate. Length .12 — .14 inch; 3^ 

 .'l.-i mm. 



The male has the middle tibia sinuate within near the tip and 

 very feebly prolonged inwards. This character is so feeble as to 

 require care in observation. 



The color of the specimens is variable, some being entirely pale or 

 fulvous, others have the middle of the thorax fuscous and the sides 

 of the elytra darker, the dark color forming a space exterior to a 

 line drawn from the humeri to the suture at apex. The variety 

 flavomacnlata is piceous, the thoracic and elytral margins paler, the 

 disc of each elytron with two oval, pale spots. 



I have seen several types sent by Miiklin, one of which (that sent 

 me by Dr. Dohrn of Stettin), enabled Mr. Reitter to fix the synonymy 

 with immimda. 



Occurs from Alaska to Massachusetts. 



E. adumbrata Mann. — This species so closely resembles the preceding 

 that I merely give the following distinctive characters. Thorax posteriorly 

 distinctly sinuate, the hind angles acute and slightly prominent. Elytra very 

 narrowly margined, margin feebly reflexed, apices rotundato-truncate. Length 

 .12 inch; 3 mm. 



The male has a forna of middle tibia similar to the next species. 

 I have however seen the other sex only. 



Occurs in Alaska. 



The four species with very feeble development of sexual characters 

 although very closely allied are readily distinguished in nature ; 

 fulvescens has the sides of the thorax rounded near the base, and 

 the margin not at all explanate; avara has the antennte entirely pale 

 and the sides of the thorax distinctly sinuate near the hind angles; 

 immunda and adumhrata have the autennal club piceous, the former 

 has the sides of the thorax very distinctly sinuate near the hind 

 angles but the elytral margin is very narrow, the latter species 

 has the sides obliquely narrowed posteriorly and the elytral margin 

 rather wide. 



E. avara Rand. — Elongate oval, rufo-testaceous, moderately shining, 

 sparsely pubescent. Head sparsely punctate. Antennae as in cor^icma. Thorax 

 one-half wider than long, slightly narrower in front than at base, sides feebly 

 arcuate, slightly obliquely narrowed posteriorly, hind angles rectangular, 

 margin reflexed, disc moderately densely punctate. Elytra one-half wider 

 than long, sides feebly arcuate and gradually narrowed posteriorly, apex 

 truncate, margin reflexed, disc moderately densely punctate and often with 



