CHALEPUS. 85 
rugose-punctate. lytra very slightly increasing in width from the base towards the 
posterior angle, thence subacutely rounded to the apex, conjointly quadrate-emar- 
ginate at the sutural angle, distinctly serrulate, the serratures stronger at the apex 
than on the sides; each elytron with ten, at the extreme base with eleven, rows of 
punctures, the second interspace strongly, the fourth and the eighth more or less 
distinctly, costate. 
. Nearly allied to C. omogerus, Crotch. Narrower, the second interspace less strongly 
costate, the serratures at the apices of the elytra smaller. 
63. Chalepus palmeri. 
Subelongatus, niger ; subtus nitidus, thorace inferiori, coxis femoribusque anticis basi rufo-fulvis ; supra opacus, 
capite inter oculos modice angulatim producto, plaga parva rufo-testacea instructo ; thorace rufo-testaceo, 
crebre et fortiter punctato, utrinque toruloso, lateribus angulatis ; elytris anguste oblongis, serrulatis, ad 
angulum suturalem subquadratim emarginatis; utrisque decem-, basi undecim-seriato-punctatis ; inter- 
spatiis secundo valde, octavo mediocriter, costatis ; interspatiis quarto sextoque leviter elevatis; utrisque 
- plaga basali callum humeralem amplectente, rufo-testacea ornatis. 
Long. 34 lin. 
Hab. Mexico, Monclova i in Coahuila (Dr. Palmer). 
Interocular space moderately produced, 5-sulcate, the middle sulcus short, terminated 
anteriorly by a longitudinal ridge. Antenne less than half the length of the body, 
filiform, slightly thickened beyond the middle; joints cylindrical, the two lower ones 
equal, the basal joint slightly thickened, the third nearly equal in length to the 
preceding two united, the fourth about two thirds the length of the third, the 
seventh to the tenth short, equal, the sixth still shorter, subturbinate. Thorax trans- 
verse ; sides straight and nearly parallel from the base to beyond the middle, thence 
obliquely converging and slightly sinuate to the apex, the anterior angle armed with 
a short oblique tubercle; above transversely convex, flattened and broadly excavated 
on the hinder disc ; on either side is a longitudinal ill-defined irregular torulose space, 
which extends from the basal nearly to the apical margin; on the medial line is also a 
very fine longitudinal groove. Elytra narrowly oblong, subparallel, rounded at the, 
apex, deeply subquadrate-emarginate at the sutural angle; margin serrulate, the apical 
 serratures rather coarser than those on the side; upper surface granulose ; each elytron 
with ten, at the base with eleven, rows of deeply punctured striz; the second inter- 
space strongly, the eighth moderately, costate, the latter finely serrulate on the hinder 
disc, the fourth and sixth faintly costate at the base and apex, the suture also distinctly 
elevated ; each elytron with a wedge-shaped rufo-fulvous basal patch, which stretches 
‘along the base from the suture nearly to the lateral margin, and extends downwards 
(covering the humeral callus) for about one fourth the length of the elytron. 
