144 LONGICORNIA. 
PLAGIOSARUS. 
Genus Tetrasaro proxime affine, at differt antennis multo brevioribus, articulo tertio solum penicillato, penicillo 
compresso, articuli latera haud amplectente, quarto abbreviato simplici. Czteri characteres ut in 
Tetrasaro. 
This genus is necessary for the reception of a species which differs from Tetrasarus 
in the fourth antennal joint being quite destitute of hair-tuft, and the third joint 
furnished with a tuft which adheres only to the lower surface without embracing the 
sides, as it does to a smaller or greater extent in Tetrasarus. From Jiscopus, in which 
also the tufts are confined to the third joint, the genus differs (besides the different 
shape of the tuft) by the form of the elytra, which are not depressed along the suture, 
or furnished with a strongly elevated longitudinal carina. The following sole species 
at present known of this genus is very differently marked from any of the numerous 
species of Acanthoderes and allied genera. 
1. Plagiosarus binoculus. 
Fulvescenti-fuscus, elytris utrinque post medium macula transversa atro-fusca fulvo anguste marginata ; an- 
tennis nigris, articulis basi (tertio quoque medio) carneo-griseis ; thorace tuberibus dorsalibus et lateralibus 
validis conicis lineaque dorsali paullo elevata, interstitiis punctatis ; elytris mox a basi gradatim, post 
medium citius angustatis, apice transversim breviter sinuato-truncatis, supra sparsim (versus basin aspere) 
punctatis. 
Long. 53 lin. 
Hab. Mrxico, Toxpam (SaJ/é). 
Group ACANTHOCININI. 
In this group I propose to include Lacordaire’s Acanthocinides (with the exception 
of a few genera which he associated with Exocentrus in one of his sections) and his 
Colobotheides. With very few exceptions they are distinguished from all other 
Lamiade by their elongate antennal scape, of which the undersurface is flexuous ; and 
the great'majority of the genera and species are peculiar to America. 
| LAGOCHIRUS. 
Lagochirus, Erichson, Wiegm. Archiv, 1847, i. p. 144. 
Lagocheirus, Lacordaire, Gen. Col. ix. p. 762 (1872). 
A characteristic American genus. One of its species ranges over the whole of the 
tropical zone, including the West Indies, and passes into temperate latitudes in North 
America, and is found still further at Tahiti and other islands of the Pacific. The 
others are local, by far the greater number being confined to limited areas in Central 
America and Mexico. About a dozen species are known. 
