RHAPHIRHYNCHUS.—TYCHAUS. 63 
so definite as in many of the other species of the genus, the intervals that bear 
them being less regular. The apex of the elytra bears a strong tooth on each side. 
There is no granulation on the prosternum. 
The only individual I have seen has lost its locality-ticket; but I have no doubt, 
from other evidence, that it is one of the specimens found at Chontales by Janson. 
Group BELORHYNCHINA. 
TYCHAUS. 
Tycheus, Fischer, Mém. Mose. vi. p. 266 (1823). 
Belorhynchus, Latreille, Fam. nat. du Régne Anim. p. 390 (1825); Lacordaire, Gen. Col. vii. 
p. 437. 
This very distinct genus consists of the following species :— 
1. Tycheus curvidens. 
Brentus curvidens, Lund, Skrivt. Naturhist. Selsk. v. 2, p. 59 *; Schénh. Gen. Cure. i. p. 341”. 
Var. signatus: elytris in interstitio secundo linea flava nulla; thorace medio plus minusve rufo-signato, in 
femina rufo-trivittato. 
Hab. Nicaracua, Chontales (Janson); Panama, Bugaba, Volcan de Chiriqui 
(Champion).—Sovutn AMERICA, Brazil? ?. 
We have received a fine series of this remarkable Brenthid. The individuals from 
Nicaragua are smaller than those from Panama. Of the interesting variety we have 
eight individuals from the same localities in Nicaragua and Panama as the type form: 
they vary in length from 20 to 33 millim. ‘Two of the examples are females 
and both have three red stripes on the thorax; in the males the red colour is very 
much diminished, but in both sexes the short yellow line behind the middle of the 
second interstice is entirely absent, and the basal mark on the same interstice is 
reduced to a mere dot. The species may be recognized by the recurved tooth at the 
apex of each elytron—the character, I presume, from which the trivial name is 
derived. ‘he largest individual is 49, the smallest 18 millim. long. 
Group BRENTHINA. 
This group corresponds with the “ Brenthides vrais” of Lacordaire after the removal 
of Cleoderes; this latter genus cannot, according to Lacordaire’s system, be included 
in the group satisfactorily, and I have placed it at the end of the Arrhenodina. It 
appears to be allied to some of the aberrant forms included in that group and to 
Rhaphirhynchus. 
