CRYPTOCEPHALUS IN AMERICA NORTH OF MEXICO 25 



however, the Commission on Zoological Nomenchiture in Opinion 228 

 (Opinions and Declarations, vol. 4, part 18, p. 211, issued April 1954) 

 placed this work on the Official Index of Rejected and Invalid Works 

 in Zoological Nomenclature. The first valid description of Crypto- 

 cephalus is found in Miiller's Fauna Insectorura Fridrichsdalina (17G4, 

 p. xiii). 



The first five synonyms in the list are here credited to Chevrolat 

 by vu-tue of Dejean's introductory statement (1837, xiii) that he used 

 names created by Chevrolat and by the citation of Chevrolat after 

 these genera in the list. 



Homalopus Chevrolat {in Dejean, 1837) is cited in Neave (1939 

 V. 2, p. 681) as a nomen nudum; however, the accompanying citation 

 in Dejean's list of the name loreyi (SoHer, 1836, p. 687, not Dejean) 

 constitutes an indication and thus validates the name Homalopus. 



The name exaratas Dejean is cited with the new generic name 

 Strigophorus Chev. in Dejean's list; evidently exaratus was not pub- 

 lished previously, so both it and Strigophorus are nomina nuda. 



The generic name Disopus has generally been credited to Stephens, 

 1839; it first appeared, however, in Dejean's catalog (1837, p. 425) 

 and was there credited to Chevrolat. The accompanying citation of 

 the Linneaus species pini (not Fabricius) described in 1758 as Chry- 

 somela pini is an indication and validates the name Disopus as of 1837, 

 with Chevrolat as its author. 



Idiocephala has generally been recognized as a valid genus, and 

 when included in the synonymy of Cryptocephalus, it has been followed 

 by "pars." Tills, I believe, has been influenced by the treatment of 

 Baly (1877a, p. 31) in which he states that "S. speciosa, Boisduval" 

 (probably speciosus Guerin) and catoxantha Saunders may be con- 

 sidered as types. Neither speciosa nor catoxantha were included among 

 the species in the original description of Idiocephala, so neither can 

 be the type-species. In the original description, the generic name is 

 foUowed by "Type A. Roei"; this clearly serves as the type-species 

 designation and refers to Anodonta roei Saunders (1843, p. 67). The 

 latter species is now considered a subspecies of Cryptocephalus consors 

 Boisduval (1835, p. 588); consequently Idiocephala is a synonym of 

 Cryptocephalus. 



Clavareau in Coleopterorum Catalogus (1913, p. 202; listed Aporo- 

 cera Saunders as, in part, synonymic with Idiocephala; however, none 

 of the species originally included in Aporocera are now in Idiocephala 

 or Cryptocephalus, so Aporocera is not a synonym. 



Three of the names in the list of generic synonymy (all described as 

 subgenera) are preoccupied. I will not propose replacement names for 

 these because I find it quite easy to dispense with subgeneric names. 



The species in the following account are arranged alphabetically 

 so they may be located readily. 



