690 BY RRHIDZ.—RHIPIDANDRI. 
short fine sete, and here and there with patches, each formed by a few white hairs; 
the punctuation is definitely geminate, there being a distinct circular puncture 
accompanied by a small setigerous one. There is a great deal of coarse punctuation 
along the front of the thorax, and a moderately long scanty setosity on the surface. 
The punctuation of the under surface is dense and coarse, like that of C. scabrosum. 
10. Chelonarium ducale, sp. n. 
Oblongo-ovale, fuscum ; elytris albido-maculatis, subtiliter setosis, maculis ante apicem in fasciam latam quasi 
ageregatis; antennis elongatis. 
Long. 8, lat. 3? millim. 
Hab. GuateMAua, near the city 5000 feet (Salvin), Duetias (Champion). 
Closely allied to C. scabroswm, rather larger, and with the surface more shining, and 
when the clothing is removed more definitely punctured. The thoracic sete are less 
developed than in C. scabrosum, and the abdominal punctuation is not quite so dense 
along the middle. There is much coarse punctuation along the margins of the thorax. 
The white flecks on the elytra are extensive; the others are rather long, fine, and 
evenly distributed; when the clothing is removed the surface is shining. Two 
specimens. 
THE CENTRAL-AMERICAN RHIPIDANDRI*. 
Leconte, in the first edition (1862) of the Classification of N.-American Coleoptera, 
p. 236, proposed a group, ‘“‘ Rhipidandri,” in the family Tenebrionide, for a small 
beetle of the United States (Xyletinus flabellicornis, Starm). In the second edition of 
this work (1883), p. 232, he transferred Rhipidandrus from Tenebrionide to Cioide, 
remarking that it bears “a deceptive resemblance to Eledona” of the Tenebrionide. 
In consequence of this, the Central-American Rhipidandri were omitted from the 
Tenebrionidee when that family was treated by Mr. Champion. 
These insects live in boleti, in the same manner as does Eledona, and I find on 
comparison that the resemblance between them is not, as described by Leconte, 
deceptive, but a perfectly genuine one, the two forms being really closely allied. 
The structure of the feet of Eledona is very peculiar for a Heteromerous insect, as 
all the tarsi appear to be four-jointed. This fact is not, so far as I can find, stated in 
the literature of Coleopterology ; and Leconte therefore doubtless supposed that the 
feet in this genus were evidently Heteromerous, and that the “ Rhipidandri,” in which 
they appear to be Tetramerous, must be quite distinct, and he was thus led to speak of 
the resemblance between Eledona and Rhipidandrus as deceptive. 
In Cherostus cornutus (a Rhipidandrid) I have been able to see the structure of the 
* By D. Suarp. 
