448 COLYDIIDA. 
the middle of the thorax, and continued backwards to near the base as three very 
obsolete grooves; near each side of the thorax there is a broad space free from granules, 
and including an elevated ridge; close to the base of the thorax there is a transverse 
channel; the surface elsewhere covered with coarse, low granules. Elytra elongate, 
with very regular series of punctures, each bearing an erect pale seta. | 
A fair series was obtained of this curious insect. The thoracic depressions are 
usually filled by an exudation, which must be removed before the limits of the grooves 
and impressions can be perceived. 
I have applied the trivial name given by Motschulsky to this species after con- 
siderable hesitation.. Assuming that there is only one species in the State of Panama 
there can be little doubt this is the insect represented by Motschulsky’s figure!. If, 
however, there should, as is quite probable, prove to be more than one species of 
Distaphyla in Panama, Motschulsky’s figure will not afford the means of distinguishing 
them, it being grossly inferior and unaccompanied by a description. Our figure and 
description are taken from examples found at San Gerénimo by Mr. Champion, and 
it is to the species these represent that the name of gibbiceps should be applied. 
Had Pascoe’s name Distaphyla not been published for this genus, I would have made 
use of Motschulsky’s Colydodes, treating it asa MS. name; but as the bad figure of 
the insect was not accompanied by a description of the genus, it seems impossible to 
supplant Distaphyla by Colydodes. In the case of the species I have acted differently, 
and made use of Motschulsky’s name with much hesitation—treating the figure as ° 
sufficient to warrant the adoption of the trivial name gibdiceps, there being no other 
in existence. 
ASYNCHITA, gen. nov. 
Corpus subcylindricum, asperatum ; antenne decem-articulate, sed articulo basali occulto, articulo decimo 
abrupte majore, apice pubescente. Acetabula antica aperta. Sulci antennariinulli. Pedes crassiusculi ; 
tibiis muticis, linearibus, absque calcaribus ; tarsis articulis basalibus tribus, brevibus, eequalibus, simul 
sumtis quam articulo quarto multo brevioribus. 
Although very different in appearance from Synchita this genus is undoubtedly allied 
_ thereto, and may take a position between it and Distaphyla. Asynchita quite resembles 
Distaphyla in form, but differs in the absence of the peculiar thoracic structures of 
that genus, and in the club of the antenne consisting only of one joint, or rather of 
two joints closely united, for the small terminal pubescent apex clearly represents the 
true eleventh joint. The antenna is inserted in a deep lateral cavity, in which the 
basal joint is entirely concealed. The structure of the sterna and ventral segments is 
that usual in the Synchitine. 
An insular genus, yet unpublished, resembles Asynchita, but has the tarsi only 
3-jointed. 
