408 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 45. 



a large deep irregularly punctate median impression. Vestiture 

 densely squamose with chocolate browm scales and with a median 

 and two lateral wliite longitudinal vittae. 



Scutellum minute. Elytra shining black, considerably broader 

 at humeri than prothorax, somewhat inflated behind, strongly 

 inclosing abdomen, separable, and faintly separately rounded at 

 apical sutural angle. Strial punctures large, deep. Striae not 

 impressed. Interspaces moderately convex, Vestiture consisting 

 of flat scales and erect scales clustered or single. The general color 

 of the vestiture is chocolate brown. A basal white fascia arises at 

 the humeri and passing back to the basal fourth then transversely 

 to the middle, forms a brown quadrate basal area. On the fourth 

 interspaces a longitudinal process leaves this transverse wliite band, 

 but does not reach the second wliite band. This latter is transverse 

 and post-median. The sutural interspace from the middle to apex 

 is clad with golden scales. The erect scales are placed in a row on 

 each interspace but are clustered in many spots in front of the 

 middle. The strial punctures are closely covered with flat scales. 



Ventral parts closely squamose, with cinereous scales on the thorax 

 and sides of abdomen and brown scales on remainder of abdomen. 

 Mesostemum transversely impressed. The intercoxal portion of the 

 metathorax and the first abdominal segment is strongly depressed. 

 Second segment almost as long as third and fourth. Fifth as long 

 as the three preceding. 



Type.— Csit. No. 14645, U.S.Nat.Mus. 



Genus LACHNOPUS Schonherr (1840). 



Ptilopus ScHONHERR, Cuxc. Disp. Meth., 1826 [not Meigen]. 

 Lachnopiis Schonherr, Gen. et Sp. Cure, vol. 6, 1840, pt. 1, p. 380. 



The type of Ptilopus was aurifer Drury. Lachnopus was proposed 

 to take the place of this preoccupied name, and hence has the same 

 type. 



Genus EVOTUS LeConte (1874). 



Evotus LeConte, Amer. Nat., 1874, pp. 458, 459. 



The monotype of this genus is Tiaso LeConte. 



POLYDRUSINI, new tribe. 



Table of genera of Polydrusini. 



1. Beak with nasal place small and inconspicuous Polydrusus Germar. 



2. Beak very short and massive, with nasal plate large, as wide as beak and dis- 



tinctly margined Scythroptis Schonherr. 



Genus POLYDRUSUS Germar (1817). 



Polydrusus Germar, Mag. der Ent., vol. 2, 1817, pp. 339-341 . 

 Polydrosus Schonherr, Cure. Disp. Meth., 1826. 



Schonherr (1826) designated undatus Fabricius as type. 



