4 J. L. LECONTE, M. D. 



EU DECT US Redt. 



This genus, characterized in the table on p. 104 of the second Ed. of 

 Class. Col. N. Am., is allied to Coryphium but differs by the antennae, 

 which are not longer than the head and prothorax and much stouter ; the 

 outer joints are distinctly transverse. The joints 1-4 of the hind tarsi 

 are short and nearly equal, combined as long as the 5th. The elytra are 

 long, parallel and densely punctured with narrow side-margin. Prothorax 

 wider than long ; sides narrowly margined, angulated about the middle 

 disc densely coarsely punctured, with a deep dorsal line ending behind 

 the middle and surrounded behind by a curved impression. 



E. crassicoriiis. — Piceous, opaque, nearly glabrous; base of antennse and 

 elytra paler; legs testaceous. Length 1.5 mm. 



One specimen, Opelousas, La. ; Mr. Salle. The dorsal segments are 

 nearly smooth. The head has two small frontal impressions and widely 

 separated occipital ocelli. The penultimate joint of the maxillary palpi 

 is thick, obconical, and the last joint small, acicular. 



DRASTERIIJS Esch. 



This genus is very similar to Elater, but differs by the dilated part of 

 the hind coxae being truncate in front of the trochanter, and not emar- 

 ginate as in Elater and Megapenthes ; the angle is therefore obtuse, not 

 prominent as in those genera. The antennae are but feebly serrate, the 

 2d and P)d joints nearly equal, united longer than the 4th. The pubes- 

 cence is coarse and the punctures deep, except in D. debilis. The color 

 is often brown-yellow, with black spots. 



Prothorax deeply punctured 2. 



Prothorax finely punctulate 8. 



2. — Prothorax not wider than elytra ."i. 



Prothorax wider than elytra, and two-thirds as long; opaque dirty piceous 



elytral striae cribrate; 6 mm. California {;rtiii<licoliiM. 



3. — Prothorax distinctly narrowed near the front 4. 



Slender, cylindrical, prothorax not narrowed in front, very densely more finely 

 punctured ; opaque, dull ferruginous, with a dorsal thoracic piceous cloud and 

 an elytral fascia behind the middle: interspaces very rough; 7 mm. S. 



Texas 2. asper. 



4.— Prothorax in great part yellow 5. 



Prothorax black 7. 



5. — Prothorax more densely punctured, less shining, with a dorsal vitta sometimes 

 absent; elytra with an elongate black spot near the base, and a transverse 



band behind the middle; 5-7.5 mm. California .3. livens. 



Prothorax less densely punctured, more shining. Head thoracic dorsal stripe, 

 scutel, elongate elytra! spot and posterior sinuate band blackish. Varies 

 with only the band of elytra dark, also with the black suffused; 6-7 mm. 

 Lake Superior, Penna., Kansas, Texas, Cal 4. elegaus. 



