COLEOrTERA. 
343 
a. Anterior coxse contiguous ; antennae 9- or 10-jointed. 
1. Oligorieiius (Redt.). 
b. Anterior coxae nearly contiguous; antennae 11-jointed. 
2. SiTODREPA (Thoms.). 
2. Antennae received between coxae, which are distant. 
a. Antennae subpectinated 3. Otenobium, g. n. 
h. Antennae not pectinated. 
* Thighs strongly clavate ; tarsi dilated. 
4. Ptinodes (Lee.), 
t Thighs not clavate ; tarsi dilated. 
n. Claws armed with a broad tooth, 
5. Trichodesma (Lee.). 
Claws not toothed 6. Nicobium (Lee.). 
J Tarsi slender ; thighs not clavate. 
7. Hadrobregmus (Thoms.), 
B. Metasternum deeply excavated in front, 
1. Antennae not serrate, last joints elongated. 
8. Anobium, 
2. Antennae serrate, last joints scarcely longer. 
9. Tripopitys (Redt.). 
C. Metasternum produced in front into a large lobe. 
10. Petalium (Lee.). 
II. First ventral segment excavated. 
A. Mesosternum carinate ; epipleurae foveate at middle. 
11. Theca (Mills.). 
B. Mesosternum emarginate ; epipleurae not foveate. 
12. Eupactus (Lee.). 
The American Xyletini constitute five genera, thus tabulated : — 
I. Elytra striated ; antennae serrated 1. Xyletinus (Latr.). 
II. Elytra not striated ; first ventral segment not excavated. 
A. Antennae serrated 2., Lasioderma (Steph.). 
B. Antennae with last 3 joints large. . . .P3. Catorama (Gru4r.). 
. III. First ventral segment excavated. 
A. Epipleurae not foveate at middle. ... 4. Hemiptychus (Lee.). 
B. Epipleurae foveate at middle ...... 5, Protheca (Lee.). 
Lasioderma— Tsmdochina, Ilrjpora (Muls.) ; HemiptycJms=i Dorca- 
toma (Lee.). 
Lastly, the Dorcatomata form only 2 genera : — Dorcatoma (Ilerbst, Thoms.) 
with the prosternum produced behind; and Camocara {Th.omB.) — Tylistus 
(J^QC.')=JEnneato7na (Muls.), with the prosternum tnmeate. The species be- 
longing to all these genera are described and generally tabulated by the 
author. ^ 
Leconte (List Col. N. Am. pp.56 and 67, notes) remarks as follows on the 
synonymy of genera of Anobiides: — Philoxylon (Lqc.) =Liozouni (Muls.) = 
JErnobius (Thoms.) ; Cnecus (Thoms.) =Xestobiwn (Motsch.) ; Sitodrepa 
(Thoms.) =Anobimn, subg. Artobium (Muls.); Cacotemnus and Hemiccdus 
(Loc.)=Hadrobreg7nus (Thoms.) ; Tylistus (ljOQ,.)=Enneatoma (Muls.) = 
Ccenocara (Thoms.). 
Crotch (Entomologist, iii. p. 126) remarks on the recent subdivision of 
the old genus Anobium.^ and on the synonymy of some species of this group. 
