12 PROCEEDINGS OP THE NATIONAL MUSEUM vol.77 



TRIBE PLATYRHININl bedel (1882) 



Tropiderini Kleine, Entomologischen Bllittern, 1910. 



Only one genus occurs in North America. The weevils of this 

 tribe breed under the bark of dying branches and trunks of trees. 



TABLE OP GENERA 1 



Transverse ridge of prothorax converging to base at middle; sides of pro- 

 thorax behind middle strongly vi^idened; eyes broadly separated, small, 

 prominent; antennae short, with an apparently loosely jointed club. 



Platyrhinus Clairville. 

 Transverse carina parallel Avith the base ; sides of prothorax straight, sometimes 

 slightly vpidened ; eyes large, depressed, more or less approximate beneath. 



Tropideres Schonherr. 



Genus PLATYRHINUS Clairville 



Platyrhinus Claieville, Entomologie Helvetique, 1798, vol. 1, p. 112. Type, 

 (costirostris Clairville) designated by Latreille, 1810= {latirostris Fab- 

 ricius) =reswosMs Scopoli (Ent. Carn., p. 24). 



Anthribus Fabricius, Nova Insectorum Genera, 1790, p. 213 (not Geoff roy, 1762, 

 Forster, 1771, DeGeer, 1775, Miiller, 1776, Forster, 1781, Geoffroy, 1785). 



Platyrrliinus Gemmingee and Haeold, Cat. Col., 1872, vol. 9, p. 2732. (Emen- 

 dation.) 



Platyrhinus resinosus Scopoli {latirostris Fabricius) inhabits 

 fungi growing upon ash trees in England. It has also been found 

 in Sfhaeria fraxinea (Westwood 1839), on decaying oak stump 

 highly charged with mycelia of a fungus (Rivers, 1886). The 

 larvae breed under the bark of decaying twigs of Carpinus hetulus 

 Linneaus, Fraxinus excelsior Linneaus, Betula alba Linneaus, 

 Alnus glutinosa Gaertner, Fagus silvatica Linneaus, and Vlmus 

 spp., (Kleine, 1910, E. B. 45) . Breeds also in dead wood of Quercus 

 (Schaufuss 1914, 1026.) 



Genus TROPIDERES Schonherr 



Tropideres Schonherr, Isis von Oken, 1828, Heft 10, p. 1135. Type, alUrostris 



Fabricius. 

 Tropideres Schonherr, Cure. Disp. Meth., 1826, p. 35. Type, alUrostris 



(Herbst), Fabricius by original designation. 

 Enedreytes Schonherr, Gen. et sp. Cure, 1839, vol. 5, p. 215. Type, hilaris 



Fahraeus. 

 Enedreutes Lacordaiee, Gen. Col., 1866, vol. 7, p. 536. 

 Tropidoderes Gemmingee and Harold, Cat. Col., 1872, p. 2733. 



The above synonymy is according to Bovie. He writes that this 

 genus does not occur in North America, although he quotes hiina- 

 culatus Olivier in the genus. I can find no essential reason for not 

 including the following species in this genus. The eyes are entire 

 in all of them. The species all breed under the bark of decaying 

 wood. 



1 After Schaufuss, Calwer's Kaferbuch, 1916, p. 1026. 



