148 RHYNCHOPHORA. 
2. Mestorus crinitus, sp.n. (Tab. VI. fig. 13.) 
Dense griseo-squamosus, setis erectis adspersus ; oculis convexis; prothorace elongato, subcylindrico, parce 
punctato ; elytris convexis, regulariter seriatim punctatis. 
Long. 6-8 millim. 
Hab. Mexico (Sallé, ex coll. Sturm), Dos Arroyos in Guerrero (H. H. Smith). 
Antenne with the scape squamose; second joint of the funiculus slightly longer than 
the first. Rostrum very densely squamose, with erect sete or scales near the inner 
margin of each eye. Thorax quite as long as broad, very slightly dilated at the sides 
in the middle, and scarcely narrowed in front, bearing distant punctures which are 
almost concealed by the dense squamosity. Elytra densely squamose, and bearing erect 
white sete; convex and much rounded at the sides, greatly broader than the thorax, 
with very regular series of fine but deep punctures. Legs squamose and setose. Front 
femora angulate beneath. 
This species may be readily distinguished from WZ. adumbratus by the elongate thorax, 
by the eyes placed nearer to the front margin of the latter, and by the more distinctly 
dentate front femora. I have seen only two examples, one of which is a very well- 
preserved specimen from Sturm’s collection, in which it was labelled “ Lagostomus 
crinitus, mihi.” Our figure represents this individual. The scales are very little 
varlegate in this species. 
3. Mestorus gracilis, sp. n. 
Angustus, dense albido-squamosus, setis erectis adspersus; oculis fortiter convexis; prothorace elongato, 
cylindrico ; antennis pedibusque rufo-obscuris, albido-squamosis. | 
Long. 44 millim. 
Hab. Mexico, Matamoros Izucar (/H6ge). 
Rostrum broad and short, flat in front, canaliculate along the middle; eyes rather 
small but very prominent ; antenne short. Thorax quite as long as broad, straight at 
the sides and very slightly narrowed in front, coarsely sculptured, but covered with 
nearly white squamosity. Scutelluny concealed. Elytra covered with white squamosity 
that nearly conceals the sculpture; rather slender ; the erect sete quite white, rather 
long, and almost transparent. Legs thick. One specimen. 
The slender form and invisible scutellum distinguish this species from UV. crinitus; 
besides this, it has no trace of armature on the front femora. 
EUMESTORUS, gen. nov. 
Rostrum breve, crassum ; scrobes laterales profunde, sub capite subtus duct ; caput post oculos constrictum ; 
femora anteriora tuberculata. 
The insects of this genus may be readily distinguished by the head being constricted 
immediately behind the convex eyes, and by the scrobes being more prolonged beneath 
the head than they are in the allied genera. The rostrum is quadrate, separated from 
