COLEOPTERA. 123 



Ei>IPLE>'OTA Casey. 



It lias been declared by M. Fauvel tluit the genera Polystoma 

 Steph. and Em|)lenota are identical. Throiigli the kindness of M. 

 Aug. Salle, I have been enabled to submit the following comparisons, 

 the type of Polystonia being the species algarum Fauv.: — 



In Polystoma the intercoxal process of the mesosternum is rather wide and 

 the sides for a long distance before the tip are very gradually convergent, so 

 that they are nearly parallel ; the tip is squarely truncate. The terminal 

 joint of the maxillary palpi is very thin, much longer than wide, and is 

 affixed obliquely to the fourth. The pronotal epipleurae are very strongly 

 inllexed and abruptly wider in the middle, rather rapidly narrowing ante- 

 riorly and posteriorly, the inferior edge being very strongly arcuate in the 

 middle. 



In Emplenota the intercoxal process of the mesosternum is in the form of 

 an angle with slightly incurvate sides, or exactly in the form of a long slender 

 cusp, the sides being rapidly and almost evenly convergent to the very apex 

 which is acute and not at all truncate. The terminal joint of tlie maxillary 

 palpi is very small, as wide as long, not affixed obliquely to the fourth of 

 which it is properly but a minute terminal process. The pronotal epijjleurae 

 are less strongly intlexed and much more nearly uniform in width throughout. 



If the American species of Aleochara are typical representatives 

 of that genus, both the above should, in the opinion of the writer, be 

 considered as distinct genera. 



QUEDIUS Steph. 



Q. silvicola n. sp. — Form rather robust, somewhat depressed. Head 

 and elytra piceous-black, prothorax very dark piceous, abdomen very slightly 

 paler, piceous ; integuments of the latter somewhat opalescent. Head mode- 

 rate, oval, feebly constricted at base, nearly one-third longer than wide ; 

 interocular surface broadly convex, without median punctures, liighly 

 polished, extremely minutely and transversely strigose, strigae wavy ; 

 having a small setigerous puncture on the extreme frontal edge near the 

 anterior angles of the epistoma, within and near the bases of the antennae, 

 also on each side a small puncture above and near the base of the antenna, 

 another near the upper border of the eye at its anterior third, also three 

 others not in a straight line on the occiput above and far behind the eye, 

 another directly behind the middle of the eye and two-thirds the length of the 

 latter from it, and finally two large and several very small scattered punctures 

 directly below the eye and along the border of the strongly elevated sub- 

 lateral carina ; labrum strongly transverse, very deeply and strongly bilobed ; 

 maxillary palpi very long and slender, last joint thin, nearly one-third 

 longer than the third ; antennae rufous at base fuscous toward tip, slightly 

 more than one-third longer than the head, basal joint as long as tlie next 

 two together, second about two-thirds as long as the third and as long as the 



