CUCUJIDZ. 499 
Hab. GuatemMaua, Santa Cruz near San Gerdénimo, Quiché Mountains 7000 to 
9000 feet, Totonicapam 8500 to 10,500 feet (Champion). 
Although very similar to C. mexicanum, this insect belongs to a different section 
of the genus, owing to the thorax having two grooves instead of one at the sides. 
The antenne are only moderately stout, their exserted seta very distinct. Head 
with two channels converging to form a single depression behind, which is so deep as 
almost to make the vertex appear bilobed. Thorax very long, very highly polished ; 
the dorsal channel very deep; the fovee remarkably elongate, so that they do not 
entirely disappear until somewhere near the middle of the length. Elytra with the 
shoulders prolonged in front, very deeply sulcate, the interstices having their outer 
margin somewhat undulatory; the scutellar depression very deep. Male with a small 
acute denticle on the front femora; the tibia with a small acute tooth on the inner 
margin above the middle; the spurs at the apex of the middle tibia turned more 
inwards than they are in the female; those at the apex of the hind tibia directed 
inwards, and placed on a small prolongation. 
Fam. CUCUJIDA*. 
This family at present includes upwards of 300 species, and is represented in all 
parts of the world. About 140 have been discovered in our region, and upwards of 100 
of them appear to be new. I have to thank M. A. Grouvelle, of Paris, who has devoted 
a great deal of attention to this family, for his kindness in examining a series of our 
species of Lemophiwus and Silvanine, and communicating to me his views thereon. 
The family Cucujidz is one as to the affinities and classification of which considerable 
diversity of opinion exists. The sexes in some cases display an inexplicable difference 
in the number of joints on the hind feet, which is subject to be one less in the male 
than it is in the female. In other cases the feet are similar as to the number of joints 
in the two sexes, but exhibit a generic difference in this respect, being in some cases 
all 4-jointed, in others all 5-jointed. Hence the family includes a much greater 
diversity in tarsal structure than is usual in the families of Coleoptera. The antenne 
are sometimes of the typical Clavicorn structure, while in other cases they have no 
trace of a club. In some forms the anterior acetabula are closed behind, while in 
others they are open. 
While so much variety is exhibited within the limits of this small family, it is at the 
same time very difficult to separate it from certain other families, ¢. g. Cryptophagide, 
Erotylide, and Monotomide. In fact, the classification of this portion of the 
Coleoptera will have to be remodelled. Captain Casey has already made various 
propositions to this end, but in the case of our limited fauna I have not felt justified 
* By D. Suarp. 
3 8* 2 
