116 NOKTII AMERICAN 



notuin ])y a narrow strongly elevated carina. Elytra at base slightly wider 

 than the pronotum ; sides but slightly divergent posteriorly and distinctly 

 arcuate ; together transversely truncate behind ; disk slightly longer than 

 wide, as long as the head and pronotum together ; rather depressed, shining 

 and impunctate ; humeri small and prominent ; three punctures at the base 

 of each elytron distinct; sutural striae parallel, arcuate, deeply impressed, 

 other striae almost obsolete. Abdominal segments but very slightly narrower 

 than the elytra; sides parallel and feebly arcuate ; surface polished and im- 

 punctate ; first dorsal not carinate ; under surface of same very finely and 

 feebly punctulate. Legs long and slender ; prosternal coxal foveae distinct ; 

 anterior coxae strongly conical, small ; metasternum continued posteriorly 

 by a thin short transverse lamina which is densely fimbriate posteriorly with 

 short yellowish setae ; two terminal segments very short and transverse. 

 Length 0.9-1.1 mm. 



Washington, District of Columbia, 1; Deer Park, Maryland, 1. 



The terminal segment of the male has two parallel arcuate carinae. 

 Tiie above description is taken from the Washington female. 



The species may be distinguished from rnjiceps by its larger size, 

 more robust form especially of the elytra and abdomen, by its nearly 

 piceous-black color, and especially by the shape of the pronotum 

 which is much more transverse, and in which the sides are not 

 parallel but distinctly convergent behind. The head is much shorter 

 and broader than in rvjiceps. 



19. E. rilficeps Lee. — Sm. Misc. Coll. 1G7, p. 28. — Form slender ; color 

 of head, prothorax, abdomen, legs and antennae dark piceons-brown, elytra 

 slightly darker, blackish ; pubescence sparse, short and fine ; surface highly 

 polished. Head rather large ; front having two small circular pits, equi- 

 distant from each other and the posterior limits of the eyes, spongy at the 

 bottom and connected by an impressed furrow which is very strongly arcuate 

 anteriorly; antennae very short and robust, scarcely one-third longer than 

 the head, last joint large, as long as the five preceding joints together, coni- 

 cal, finely acuminate at tip, penultimate nearly three times as wide as long. 

 Prothorax equal in width to the head, very slightly wider than long ; anterior 

 and posterior margins arcuate, tlie former most strongly so ; anterior and 

 posterior angles obsolete, very broadly rounded ; sides parallel and nearly 

 straight ; disk impunctate, moderately convex, having in the middle near 

 the base two large circular spongy impressions separated by a distinct longi- 

 tudinal carina, also at each side just behind the middle an equally large 

 circular spongy impression. Elytra at base very slightly wider than the 

 head; sides very feebly divergent, feebly arcuate near the apices, one-fourth 

 longer than the width at V)ase ; together transversely truncate behind: 

 suture fully one-half longer than the pronotum ; disk impunctate, almost 

 glabrous ; sutural striae deep, feebly arcuate and close, each originating in 

 a densely pubescent puncture near the base and very close to the suture ; 

 each elytron also has two elongated impressions at the base, the outer ones 

 being much the stronger. Abdomen narrower than the elytra ; border 



