Uevisioii of the TanyiTliyncliii 



11 



rostrum presents the somewliat characteristic feature of being 

 covered with scaling on the dorsal surface, but quite bare 

 and very shiny beneath. In the genera allied to Myorrhinus 

 and Stereorrhynchus the underside of the rostrum is apt to be 

 more or less strongly comjjressed laterally, so that in cross- 

 section it would a])pear to be roughly triangular with the 

 apex downwards. The scrobes are always visible from above, 

 at least at the insertion of the antennee, and are usually 

 quite dorsal in position, being sometimes very closely 

 approximated and foveiform. 



As at present known, the great majority of genera are 

 peculiar to Africa, and only a few species are known from 

 the following localities : Eastern Europe, Arabia^ India, and 

 Australia. 



Synopsis of Genera. 



1. (18.) Corbels ofposterior tibiae cavernous 



or subcavernous, i. e, with their 

 external margin bent inwards 

 more or less broadly (narrowly 

 in Synaptocep/tahis) . 



2. (3.) Rostrum separated from head by a 



transverse impressed line. — * 

 Scape reachiiig thorax ; claws 

 connate at base; funicle with 

 joint 2 much longer than 1, and 

 1 longer than 3; elytra without 



erect setae 1. Sympiezorrhynchus, 



JSchh. (S. Africa.) 



3. (2.) Rostrum continuous with the head. 



4. (13.) Scape of antennae e.\ceediug an- 



terior margin of eye. 



5. (6) Tarsal claws free. — Eyes lateral ; 



scrobes sublateral ; antennas in- 

 serted about middle of rostrum, 

 the two basal joints of funicle 

 equal ; tarsi witli joint 1 as broad 

 as 3; elytra with depressed setaj. 3. Lipothyrea, Pasc. 



0. (5.) Tarsal claws connate at base. 



7. (10.) Scrobes dorsal, very close together, 

 the space between them narrower 

 than base of scape ; antennae 

 long and slender, the scape ab- 

 ruptly clavate. — Elytra witli long 



(Australia.) 



* In every case the characters given after the rule are alwavs present 

 in the section to which they belong, and they may or may notbe present 

 in the next corresponding section. They are not therefore absolutely 

 dL^criminative characters, but will serve to facilitate exact determination 

 of a genus. 



