162 Coleopterological Notices, II I. 



Female. — Broader than the male, less acute behind ; eyes separated by one- 

 third more than their own width ; antennae one-half as long as the body, the 

 third joint more than twice as long as the second and two-thirds as long as 

 the fourth ; anterior tarsi slender, not quite as long as the tibiae ; fifth ventral 

 segment broadly impressed, the apex very feebly, narrowly sinuate, the geni- 

 tal armature truncate at apex, with the angles broadly rounded. 



Length 10.0-12.0 mm. ; width 3.9-4.7 mm. % $ . 



New York ; Virginia. 



This species is rather abundant and apparently not subject to 

 great variation. 



CISTELA Fab. 

 Chromatin Lee. — Sm. Misc. Coll., Ill, p. 244. 



This genus is at present quite composite, but the species here 

 referred to it agree in having the antennas more or less compressed, 

 always distinctly serrate internally, with the third joint very short 

 in both sexes, but decidedly longer in the female than in the male, 

 and the fourth joint of the maxillary palpi somewhat slender, with 

 the angle at the base less than right. 



The genital armature is more or less truncate or feebly sinuate 

 in the female, as is usually the case throughout the family, and is 

 deeply bilobed in the male, the two lobes sublaminate and long, but 

 scarcely attaining the development or densely corneous structure 

 seen in Capnochroa and Androchirus. 



The punctuation and pubescence as a rule are extremely dense, 

 the latter very short and more or less inconspicuous ; the punctures 

 are, however, much sparser in the aberrant amoena. The latter 

 species forms the type of the genus Chromatia of LeConte, but the 

 difference in the form and prominence of the genital armature, "the 

 sixth ventral segment being prominent and deeply excavated in the 

 male," upon which it was separated, does not of itself appear to be 

 sufficiently decisive. 1 It is quite true that amoena differs greatly 

 from brevis in general facies and sculpture, but marginata is a 

 satisfactory intermediate in many of its characters in spite of its 

 much larger size, and it does not seem proper to admit the generic 

 validity of amcena without 'granting that of marginata and also the 

 Central American nigricornis, a specimen of which is before me, 



1 Note the extraordinary diversity in the male sexual characters of this 

 genus as exemplified by C. brevis and the closely related C. theveneti. 



