KO. 1988. STUDIES OF NORTH AMERICAN WEEVILS— PIERCE. 411 



pubescent. Underside clothed as above, but with bristles shorter 

 and finer; last abdominal -with a circular pubescent depression with- 

 out scales. 



Described from 26 specimens collected by J. D. Mitchell and R. A. 

 Cushman in the Chisos Mountains, Brewster County, Texas, June 

 10-12, 1908. 



Genus SCIAPHILUS Schonherr (1826). 

 Sdaphilus Schonherr, Cure. Disp. Meth., 1826, p. 98. 

 The originally designated type is muricatus Fabricius. 



THYLACITINI, new tribe. 



Brachyderini HoRK , 1876. 



Table of genera of Thylacitini. 



1. Second abdominal with anterior edge straight or nearly so; scape not passing the 



eyes; scrobes usually prolonged under eyes; eyes very prominent. 



Strophosoma Billberg. 



2. Second abdominal with anterior edge arcuate; scape passing the eyes; scrobes 



evanescent before the eyes Thylacites Germar. 



Genus STROPHOSOMA Billberg (1820). 



Strophosoma Billberg, Enum. Insect. Mus. Billb., 1820. 

 Strophosomus Schonherr, Cure. Disp. Meth., 1826, p. 97. 



The type is coryli Fabricius, as designated by Schonherr (1826). 

 Genus THYLACITES Germar (1817). 



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

 Brachyderes Schonherr, Cure. Disp. Meth., 1826, p. 102. 



Six species were originally included in the genus, from which 

 Leach (1819, 1824) selected incanus Lmnseus as type. Brachyderes 

 is isogenotypic. Schonlierr in 1826 designated fritillum Panzer 

 {robinise, Herbst) as type of Thylacites, and in 1833 designated catar- 

 rhactus (cataractes) Sahlberg as type of the same genus. The latter 

 species is type of Sahlberg's (1823) genus Cycloderes, which therefore 

 takes the place of Schonherr's erroneously named genus, Thylacites. 



Tribe EPICffiRINI Pierce (1909). 



Table of genera of Epicaerini. 



I. Side pieces of mesosternum very unequal, the episternum larger and attaining the 

 elytral margin, epvmeron usually small, sometimes very small... Group Epicseri. 



1. Articular face of hind tibije scaly; support of deciduous piece of mandibles very 



prominent; antennse rather slender, club distinct Anomadus Horn. 



2. Articular face of hind tibiae glabrous; support of deciduous piece of mandibles 



moderately prominent, 

 a'. Scutellum transverse, T-shaped, the lobes separated from the base by projec- 

 tions of the elytra Cleistolophus Sharp. 



