181 ) 



VI. On New Genera and Species of Neotropical Curculionidae. 

 By GxjY A. K. Marshall, C.M.G., D.Sc. 



[Read March 1st, 1922.] 



Plates III, IV. 



Lacordaire long ago pointed out (Gen. Col. vi, pp. 114, 

 115) that the genus Cyphus Germ., as defined by himself, 

 was a composite one and would need subdivision; and 

 although three or four species have since been removed 

 from it, the name is still generally used in an erroneous 

 sense. 



Germar (Ins. Spec. Nov. 1824, p. 429) divided his genus 

 into three sections, the first of which he called " Genuini," 

 and this must therefore be regarded as the typical group. 

 In it he included the following new species : argillaceus 

 (a synonym of gibber Pall.), inhalatus, chlorosiomus, litiis 

 (transferred by Schonherr to Pachnaeus), and albiceris 

 (the genotype of Hadropus Schh.). 



Schonherr (Disp. Meth. 1826, p. 108) included the first 

 two of these species in his Stirps 1 of Cyphus and cited gibber 

 as the type of the group, and this species must therefore 

 be accepted as the genotype of Cyphus. This insect is 

 clearly not congeneric with the brilhant species with which 

 its generic name has unfortunately become associated, 

 and the species of Cyphus cited in the Munich Catalogue 

 will now have to be allocated to six different genera, which 

 are defined in the following key. 



1. (4) Mentum without setae; stria 10 on the elytra broadly 



interrupted in the middle for nearly half its length; 

 metepimeron not exposed. 



2. (3) Antennae very slender, the scape exceeding the eye; the 



corbel of the hind tibiae not ascending the dorsal edge 

 of the tibia ; joint 2 of the tarsi as long as broad ; mes- 

 episternum touching the etytron; genotype hituherosus 

 Gyl Stenocyphus, g. n. 



3. (2) Antermae stout, the scape not exceeding the eye; the 



corbel of the hind tibiae markedly ascending, its dorsal 

 row of bristles being much longer than the apical one; 

 joint 2 of the tarsi strongly transverse; mesepisternum 

 TRANS. ENT. SOC. LOND. 1922. — PARTS I, II. (JULY) 



