BATRISINI 233 



planifrons (Schaufuss). 1872. Bogota, Colombia. (Batrisus) {tri- 



punctatus Reitter, 1882) 

 productus Raffray. 1897. Yuracaris, Bolivia. 

 punctatus Raffray. 1897. Mexico. 

 resectus Raffray. 1897. Brazil. 

 trijoveolatus (Schaufuss). 1872. Bogota, Colombia. (Batrisus) 



Unplaced 



coronatus (Westwood). 1870. Brazil. (Bryaxis) 



concolor Raffray. 1908. Paraguay 



rugiceps (Schaufuss). 1872. Bogota, Colombia. (Batrisus) 



SYRBATUS (Reitter, 1881) 



Reitter (1881, 1882, 1885, 1888) (Syrbatus, Arthmius) 

 Raffray (1897, 1904, 1908, 1908a) (Arthmius) 

 Raffray (1917) (Syrbatus) 



This genus was treated as a subgenus of Arthmius until recent years. It is 

 undoubtedly closely related to Arthmius but generically distinct on pronotal 

 structure. All Syrbatus have a longitudinal sulcus on each side of the pro- 

 notum, and these sulci are absent in Arthmius; the present genus may be re- 

 garded as intermediate between Arthmius and Syrmocerus. 



With one questionable exception, it is a South American genus: Brazil (25) ; 

 Paraguay (3); Argentina (2). In addition to these thirty species Raffray 

 (1897a) described mashona from Salisbury, Southern Rhodesia, Africa as 

 belonging to the genus! 



I have reorganized the key to males (1897) and key to groups (1904) 

 of Raffray to include recent work: 



Key to the Groups of Syrbatus Males 



Sides of head (genal-temporal area) simple, neither ridged nor cari- 



nated 2 



Sides of head (genal-temporal area) longitudinally carinated 5 



2. Antennae more or less abnormal in the male sex Group I 



Antennae simple, similar to the female 3 



3. Head dorsally excavated Group II 



Head not excavated or infossate on dorsal surface 4 



4. Epistome (clypeus) armed or abnormal Group III 



Epistome (clypeus) simple Group IV 



5. Antennae abnormal Group V 



Antennae simple Group VI 



Group I 



Represented by a single species, antennator, in which the male has the 

 third antennal segment much longer than wide and the latero-apical angle 



