12 RHYNCHOPHORA. 
Hab. Mexico, Jalapa (Trujillo), Cerro de Plumas (Hége). 
Antenne thick, the sete very distinct. Groove of the head and rostrum rather 
shallow and indistinct, the sides forming it broad, with opaque surface. Thorax 
rounded, the surface shining, bearing a few distant coarse punctures. Elytra broad, the 
punctures large; the fourth interstice indistinct, the fifth carinate; the punctures 
outside this large, the intervals crenate. At the base of each elytron there is a distinct 
small prolongation, overlapping or embracing the extreme base of the prothorax. 
Head shining on each side beneath, with an opaque space along the middle, bounded 
by some setee which extend on to the pterygia, where they become numerous. Front - 
tibiz rather broad, but their notch and its processes very indistinct. 
Only two specimens have been procured of this distinct species ; in outward appear- 
ance it at first sight resembles the species near S. pygmaeus rather than those with 
obsolete tibial notch. 
8. Stereodermus mitratus, sp.n. (Tab. I. fige. 8; 8a, profile of head.) 
Piceus, rostro antennisque nigricantibus, nitidus; vertice profunde emarginato, angulis liberis; prothorace 
fere impunctato; elytris basi emarginato, punctatura discreta, intervallis tantum subcarinatis. 
Long. 6 millim..: 
Hab. Panama, Volcan de Chiriqui (Champion). 
This is a species in which the emargination of the front tibiz is reduced to a 
minimum ; at the same time the vertex is so largely developed on each side of the 
channel, that the posterior angles project backwards as free processes ; the elytra are 
emarginate at the base, and form on each side a projection that embraces the base of 
the thorax, by which character the species comes near WS. dentipennis, from which it 
differs in so many details, that the two cannot be considered closely related. 
Narrow. Antenne thick, with elongate terminal joint. Vertex quite shining, its 
posterior angles free and divergent. ‘Thorax with only a very few distant and not large 
punctures, anterior transverse depression deep; median sulcus deep and broad, not 
extending quite to the base. Elytra with the punctures very coarse; the second 
interstice scarcely concealed even in the middle, third strongly raised, almost carinate, 
fourth distinct from fifth, though very much crenate by the large punctures, fifth 
cariniform ; external punctures large. Front tibie with only a shallow notch and no 
process above it. Head shining beneath, with a groove along the middle occupied by 
some large punctures, in which are placed the serial sete, the pterygia sparingly but 
distinctly hirsute. 
Only one specimen has been procured of this species. 
