of the Amazons Valley. 91 
a type specimen of Hulachus costatus which I have received from Dr. 
Schaum, I find all the abdominal segments to the fourth inclusive 
gradually diminishing in size, the first being very little larger than 
the second. In this respect, and in the relative position of the 
posterior cox, we find gradations that often render the application 
of these characters very uncertain. The structure of the mentum is 
somewhat peculiar: it is shortly transverse, narrowing considerably 
anteriorly, its two sides fringed with long hairs, and strengthened 
on its external surface by a curved, strongly elevated line which 
leaves a very decided hollow behind it. 
Coniophea exarata. (Pl. V. fig. 8.) 
C. dense griseo tomentosa; elytris fortiter costatis, interstitiis profunde 
sulcato-punctatis. 
Hab. Ega. 
Slightly oblong-ovate, covered with a short, very dense, greyish 
tomentum ; head subquadrate, deeply inserted in the prothorax, con- 
cave in front, the sides reflected; eyes lateral, oblong; antennz short, 
robust, the two basal joints incrassated, the last two forming a short 
compressed club, the seven intermediate slightly transverse; mentum 
transverse, narrowed and ciliated in front; labium large, slightly trans- 
‘yerse and somewhat rounded anteriorly ; labial palpi slender, the ter- 
minal joint ovate-elongate; maxillary lobes narrow, especially the 
inner; maxillary palpi robust, the terminal joint ovate, obtuse; pro- 
thorax subquadrate, bisinuate anteriorly, the central part forming a 
short rounded lobe, advancing on the head, the sides nearly straight, 
narrowly margined, posteriorly closely connected to the elytra, the disk 
with two sinuous elevated lines on each side, the outermost incurved 
anteriorly, centre of the disk with a slightly impressed longitudinal 
line ; scutellum punctiform ; elytra a little broader than the prothorax, 
each with five strongly elevated lines, including the one at the suture, 
the interstices with a deeply impressed zigzag line; legs ferruginous, 
shining ; tibie short, subtrigonate, unarmed; tarsi with the three basal 
joints shorter than the claw-joint; body beneath dark brown, rugosely 
punctured, the abdominal segments with a row of longitudinal elevated 
lines at the base. Length 1} line. 
ENDESTES. 
Caput paulo exsertum, subquadratum, lateribus reflexis. Ocul’ magni, 
transversim ovati. Antenne basi tectee, 11-articulate, sensim incras- 
sate. Prothorax elongatus, postice contractus, antice truncatus, medio 
bicarinatus, lateribus infra excavatis. Elytra elongata, subcylindrica, , 
carinata. Pedes robusti; tibie subtrigonate, vix calcarate ; tarsi arti- 
culis tribus primis brevibus. Corpus elongatum, cylindricum. 
Mecedanwm, shortly characterized by Erichson, appears to be re- 
H 2 
