48 MEMOIRS ON THE COLEOPTERA 



the seventh barely traceable or wanting; elytra pale, sometimes 

 with a feeble clouded post-median fascia (sejnnctnm) 63 



Body elongate and subparallel, markedly depressed as in the planatum 

 group, the head notably large; striae very coarse, entire, the punc- 

 tures small; seventh stria virtually obsolete (graiidiccps) 67 



Body slender, small is size, depressed; head rather well developed; striae 

 entire, punctured, except apically; dorsal punctures three in num- 

 ber (rickseckeri) 



I have not seen rickseckeri Hayw., and can therefore add nothing 

 further to the author's description (T. A. E. S., 1897, p. 85). The 

 discovery of three well developed foveae on the elytra of festivum 

 of the bifasciatum group, a species otherwise allied to that, as well 

 as to horni, and having identical elytral ornamentation, prevents 

 us from founding a distinct group of the genus upon rickseckeri. 



I Form oblong-suboval, convex, polished, black, virescent anteriorly, 

 aeneous on the elytra, which are just visibly pallescent posteriorly; 

 under surface piceous-black, the abdomen pallescent posteriorly, the 

 legs pale rufous; head ( 9 ) not quite as wide as an elytron, fully three- 

 fourths as wide as the prothorax, with distant moderate sulci; an- 

 tennas piceous, gradually pale basally, distinctly shorter than the 

 elytra, the medial joints between two and three times as long as 

 wide, distinctly longer than the ninth or tenth; prothorax trans- 

 verse, one-half wider than long, the base and apex equal and four- 

 fifths the maximum width, the rounded sides oblique behind, becoming 

 feebly sinuate near the angles, which are right and very sharp; mar- 

 gins narrowly reflexed; anterior impression subobsolete, the posterior 

 distinct; stria biabbreviated; foveae small, deep and linear, nearly 

 smooth, the carina very short; elytra parallel, nearly one-half longer 

 than wide, scarcely one-half wider than the prothorax, circularly 

 rounded behind; stria j wide, feebly impressed, ending at about api- 

 cal fourth, very coarsely, not closely punctate, the seventh as dis- 

 tinct as the others; foveae small, confused with the strial punctures 

 at basal and apical third. Length (9) 3.8 mm.; width 1.45 mm. 



New Jersey nigrum Say 



A- Nearly similar but somewhat more elongate and with smaller head, 

 this being much narrower than an elytron (9), subequal (cf). 

 the antennae longer, especially in the distal joints, though evi- 

 dently shorter than the elytra; prothorax subsimilar, the elytra 

 a little longer, with rather deeper striae; color not so deep black, 

 piceous, the elytra more or less dark castaneous. Length (cf 9 ) 

 3.8-4.2 mm.; width 1.45-1.6 mm. Illinois. Four examples. 



facile n. subsp. 



Form shorter and more ventricose than in nigrum, still deeper greenish- 

 black throughout above, the elytra nowhere at all paler; under sur- 

 face piceous-black, the legs pale rufous; head smaller than in nigrum, 

 three-fourths as wide as the prothorax, distinctly narrower than an 

 elytron (cf ), the sulci less distant; antennae longer and more slen- 



