66 Journal New York Entomological Society. [Vol. vi. 



that author by five, the species hitherto placed in Sinoxylon being quite 

 heterogeneous and in no single instance truly a member of that genus. 

 Sinoxylon -dinoderoides, Amphicerus for lis and Dinoderus brevis are 

 also types of distinct genera. The genus proposed for the last named 

 species is called Patea in the table. The genera known thus far may be 

 thus distinguished : — 



Tarsi long, with the last joint relatively shorter, the second joint usually elongate ;. 

 claws and tibial spurs stouter, grooved beneath, the edges of the groove minutely 



crenulate 2 



Tarsi short, the four basal joints subequal among themselves and together nearly 

 equal to the fifth; claws smaller and more slender, not at all crenulate within, . 9- 

 2 — Funicular joints of the antennae very short and closely united, together never 

 longer than the first joint of the club, the latter long, loose and strongly com- 

 pressed 3 



Funicular joints more elongate and less closely united, together generally much 



longer than the first joint of the club 6 



3 — Antennal club 3-jointed 4- 



Antennal club 4 jointed Tetrapriocera 



4— Antennae 10-jointed, the elytral declivity with well-marked spines or tubercles. .5 



Antennre 9-jointed, the elytral declivity without spines or tubercles at the sides, or 



with very rudimentary tuberculiform irregularities, excavated near the suture, 



the latter with a spiniform elevation ; antennal club moderate in development,. 



its joints decreasing in width and only very feebly serriform Xylopertha 



5 — Antennal club moderately developed, its first and second joints nearly similar in 



form ; elytral declivity sexspinose X ylobiops 



Antennal club greatly elongated, its first and second joints dissimilar in form, the 

 former more or less outwardly produced at apex ; elytral declivity quadritubercu- 



lose Dendroblella 



6 — Joints of the antennal club strongly compressed and deeply bistriate from the ap- 

 ical margin; front simply tumid; hind angles of the prothorax rounded. 



Amphicerus 

 Joints of the antennal club strongly compressed but not striate, the two sensitive patches- 

 near the apices of the joints rounded and feebly marked ; front lamellarly promi- 

 nent behind the clypeus ; hind angles of the prothorax not rounded. . Apatides 

 Joints of the antennal club but feebly compressed and generally quite convex, the 

 first two more or less transverse, with the two sensitive patches rounded and sub- 

 apical ; front not transversely prominent 7 



7 — Tibiae dentate externally ; claws abruptly bent at base, not distinctly crenulate ; 



size very large Dinapate 



Tibiae not c'entate ; claws evenly arcuate ; size moderate or small 8 



8 — Front margined at the sides ; eyes well developed Bostrichus 



Front not margined, convex ; eyes small Micrapate 



9 — Antennae with the two basal joints relatively smaller, the funicle well developed ;. 

 club rather short, 3-jointed. 



Antennae 10-jointed ; body elongate, the head exserted Dinoderus 



Antennae I 1 -jointed ; body short and stout ; head deeply inserted Patea 



