24 PROCEEDINGS OP THE NATIONAL. MUSEUM vol.77 



PIESOCORYNUS PLAGIFER Jordan 



Piezocorynus plagifer Jordan, Novitates Zoologicae, 1904, vol. 11, p. 277 ; name 

 proposed for P. dispar LeConte, Proc. Amer. Philo.s. Soc, 1876, vol. 15, 

 p. 402 (not Gyllenhal 1833). 



Feeds as adult on fungus growing on trunks of dead beech {Fagus 

 americana) ; taken in abundance by C. Dury near Cincinnati, Ohio 

 (Beutenmiiller, 1893). On old logs and under loose bark in the 

 District of Columbia (Ulke, 1902, p. 55). Occurs in Ohio, Ken- 

 tucky, Mississippi, and Georgia. 



PIESOCORYNUS MIXTUS LeConte 



Piezocorymis mixtus LeConte, Proc. Amer. Philos. Soc, 1876, vol. 15, p. 402. 



Taken under the same circumstances as plagifer (Beutenmiiller, 

 Ulke). Occurs in New York, Maryland, Ohio, Virginia, Florida, 

 Covington, La., and Columbus, Tex. 



PIESOCORYNUS MOESTUS LeConte, J. E. 



AntJiribus moestus LeConte, Ann. Lye. Nat. Hist. New York, 1824, vol. 1, p. 172, 

 pi. 2, fig. 13 (capilUcomis Say, Journ. Acad. Nat. Sei. Pliila., vol. 5, No. 2, 

 p. 249). 



Kare on dead branches in Florida (Schwarz, 18Y8). On old logs 

 and under loose bark in District of Columbia (Ulke, 1902, p. 55). 

 Also taken at Covington, La., May 28-June 14 (H. Soltau). 



PIESOCORYNUS TESSELATUS Schaeffer 



Piezocorynus tesselatus Schaeffer, Trans. Amer. Ent. Soc, 1906, vol. 32, p. 274. 

 Described from the Huachuca Mountains, Ariz. 



PSEUDANTHRIBUS, new genus 



AntlirWus LeConte, Proc Amer. Philos. Soc, 1876, vol. 15, pp. 402, 403 (not 

 GeofEroy 1762). 



just behind the humeral callus. The granules are somewhat coarser in virginicus than in 

 any of the other species. Although special and easily perceived sexual differences aie 

 present in four of the five species, there seems to be no well-marked sex character affecting 

 them all ; the basal segments of the abdomen are generally slightly flattened in males, 

 evenly convex in females, but this distinction is often impossible to appreciate. The tarsal 

 claws of all the species have a broad basal tooth. 



Localities cited are for specimens in the United States National Museum collection. 

 Supplementary key to the North American species of Piesocorynus: 

 1. Elytra with an extensive, ochreous, discal area (that contrasts strongly with the black 

 sides) extending longitudinally from just behind the scutellar callus to declivity, 

 wider in basal half where it covers the first five intervals, than towards declivity 

 where it entirely covers only the first and second intervals, and occasionally the 

 third and fourth, in part ; sides of elytra black, except ninth interval which is 

 tessellated ; pronotum with three distinct, slightly postmedian elevations arranged 

 in a transverse row, the central one more prominent ; postscutellar carina lacking ; 

 pronotal punctures shallow and extremely dense, small at apex but becoming much 



