Redescription of the holotype of Bostrichoclerus bicornus Van Dyke, 1938, a rare species of the New World Tillinae Fauna (Coleoptera: Cleridae), with some taxonomic notes.

Bostrichoclerus bicornus Van Dyke is known from southwest United States and northwest Mexico. To date, only two specimens have been captured: the holotype, collected on Isla Angel de la Guarda, in the Gulf of California, Mexico, and a second individual collected in San Bernardino County, California, United States. The original description of B. bicornus is brief and lacks any images. Considering its rarity, we present the redescription of this species based on the examination of the holotype and compare this taxon to similar genera of New World Tillinae. Images of the holotype and the Bostrichoclerus specimen collected in southern California are given. We conclude that B. bicornus is undoubtedly a member of the subfamily Tillinae with unclear intergeneric relations in the group.

Five new species of Cymatodera Gray, 1832 (Coleoptera: Cleridae: Tillinae) from Mexico and Central America.

Five new species of Cymatodera from Mexico, Guatemala, Honduras, Costa Rica and Panama are described here based on adult male and female specimens: Cymatodera humeralis sp. n; Cymatodera lorenae sp. n.; Cymatodera crassa sp. n.; Cymatodera depressa sp. n; and Cymatodera nigrofasciata sp. n. Male genitalia and other characters of taxonomic value are used for diagnostic purposes.

Taxonomic revision of the New World genus Callotillus Wolcott (Cleridae, Tillinae), with the description of the new genus Neocallotillus, and an illustrated key of identification to species.

The New World checkered beetle genus Callotillus Wolcott, 1911 is revised and the new genus Neocallotillus established. The subspecies Callotillus elegans vafer Wolcott is synonymized with the nominal subspecies, Callotillus elegans elegans (Erichson), which is transferred to, and designated as the type species of Neocallotillus gen. n. as Neocallotillus elegans (Erichson, 1847), comb. n. Two additional species are transferred from Callotillus to the new genus: Neocallotillus intricatus (Wolcott & Dybas, 1947), comb. n. and Neocallotillus crusoe (Wolcott, 1923), comb. n., the latter tentatively and based on Wolcott's original description. Callotillus is now composed of two species: Callotillus eburneocinctus Wolcott, 1911 and Callotillus bahamensis Vaurie, 1952. All abovementioned species except Neocallotillus crusoe are diagnosed and redescribed. In the absence of reference material of Neocallotillus crusoe, Wolcott's original description is transcribed. An illustrated key to species is provided. Characters of taxonomic relevance are illustrated and discussed. Updated distribution maps and locality data for all specimens examined are presented.

A checklist of the New World species of Tillinae (Coleoptera: Cleridae), with an illustrated key to genera and new country records.

This checklist presents the distribution of the checkered beetle subfamily Tillinae (Coleoptera: Cleridae) in the New World. Information for 164 species and 2 subspecies from 11 genera is included. The data are based on an extensive survey of material collected throughout the Americas, descriptions of new species, a number of revisionary works, data from museum specimens, as well as unpublished checklists. Cymatodera, the most speciose tilline genus in the New World, has its greatest diversity in Mexico where 100 of the 134 recognized species are known to occur. Remaining genera inhabiting the New World and corresponding species numbers are: Araeodontia, 5 species; Barrotillus, 1 species; Bogcia, 2 species; Bostrichoclerus, 1 species; Callotillus, 5 species; Cylidrus, 1 species; Cymatoderella, 3 species; Lecontella, 3 species; Monophylla, 4 species; and Onychotillus, 5 species. An illustrated key to the genera of the New World Tillinae is provided. Forty-eight new country records are given for 35 species. References are presented for all species listed. Distribution maps for all New World genera are provided and locality data is presented for selected species.

Four new species of Cymatodera Gray from central and southern Mexico (Coleoptera, Cleridae, Tillinae).

Four new species of Cymatodera are described from Mexico: Cymatoderatortuosa Burke & Rifkind, sp. n. from Hidalgo and Tamaulipas; Cymatoderaortegae Burke, sp. n. from Colima, Jalisco and Michoacan; Cymatoderagerstmeieri Burke & Rifkind, sp. n. from Chiapas; and Cymatoderamixteca Burke & Rifkind, sp. n. from Puebla and Guerrero. Male genitalia and other characters of taxonomic value are illustrated.

Cymatodera ochlera Barr, a junior synonym of Cymatodera wolcotti Barr, with a comparison to similar species (Coleoptera: Cleridae).

Cymatodera ochlera Barr 1972 has been considered to be very similar to but distinct from C. wolcotti Barr 1950. We present evidence to show that these two species are conspecific and C. ochlera should be treated as a junior synonym of C. wolcotti. Cymatodera wolcotti is compared to C. balteata and C. undulata, two species remarkably similar to C. wolcotti. Morphological characters of significant value are presented that confirm C. balteata and C. undulata are separate species. Images of all characters discussed are provided. 

Four new species of Cymatodera Gray from Mexico (Coleoptera, Cleridae, Tillinae).

Four new species of Cymatodera from Mexico: Cymatodera bogcioides sp. n.; Cymatodera pueblae sp. n.; Cymatodera mitae sp. n.; and Cymatodera lineata sp. n. are described based on adult male and female specimens. Male genitalia and other characters of taxonomic value are presented.

Six new species of Cymatodera from Mexico and Central America and the retention of Cymatodera obliquefasciata as a valid name (Cleridae, Tillinae).

Six new Cymatodera speciesfrom the Mexican states of Jalisco and Chiapas, and the Central American countries of El Salvador, Honduras, Costa Rica and Panamá are described: Cymatodera rosalinae sp. n., Cymatodera capax sp. n., Cymatodera sinuosa sp. n., Cymatodera vittata sp. n., Cymatodera rubida sp. n. and Cymatodera limatula sp. n. Justification for retaining Cymatodera obliquefasciata within Cymatodera instead of transferring it to Bogcia is provided. Male genitalia and other characters of taxonomic value are illustrated.

ResumenSe describen seis nuevas especies del género Cymatodera pertenecientes a los estados Mexicanos de Jalisco y Chiapas, y los países Centroamericanos de El Salvador, Honduras, Costa Rica y Panamá: Cymatodera rosalinaesp. n., Cymatodera capaxsp. n., Cymatodera sinuosasp. n., Cymatodera vittatasp. n., Cymatodera rubidasp. n. y Cymatodera limatulasp. n. Se proporciona información sobre la retención de Cymatodera obliquefasciata dentro de Cymatodera, invalidando así su transferencia a Bogcia. Se presentan ilustraciones de la genitalia masculina así como otros caracteres de valor taxonómico.