GONIOCLEUS. 
Key to the Central-American Species. 
. Rostrum half as long again as broad, with prominent mesial carina . 
Carina absent, or short and not prominent . - ee a 
. Rostrum, head, and pronotum smoothly and rather sparingly punctured ; eye 
with sharply marked buffish-white border . 
No such border to eye, or rostrum coarsely punctured . Lo 
. Elytra, besides the tubercles in the third interstice, with numerous smaller ones. 
Only three more or less distinct tubercles or pustules situated in the third 
interstice . 2. 6 6 6 ee ee ee we 
. Pubescence of upperside almost uniformly ochraceous ; pronotum with three 
heavy tubercles; a distinct but short mesial carina on rostrum . 
Pubescence variegated, often olivaceous-black . . 
. Fifth tubercle of third interstice of elytron larger than the fourth 
Fifth tubercle of third interstice of elytron smaller than the fourth, some- 
times absent er 
. Head, pronotum, and pygidium with some sharply defined, conspicuous, 
ochreous spots . 
Without such spots. . . . ‘ . . 
. A very large black area common to both elytra contrasting sharply with the 
base, sides, and apex of the latter . . , Loe 
A conspicuous buffish-white spot behind middle of elytra ; base of rostrum 
grey ; legs black 
Markings different . 
. Apex of rostrum sinuate . 
Apex of rostrum not distinctly sinuate 
i. Dorsal carina of pronotum strongly convex. . . . « + 
Dorsal carina of pronotum not or feebly so . 
. Legs black or brown-black ; tibie with grey ring or spot 
Legs ringed with rufous . . . woe see ee Loe 
. Side of pronotum sinuate between dorsal carina and apex of lateral one ; third 
interspace of elytron with five tubercles: a small species, 34 mm. long . 
Side of pronotum not sinuate before dorsal carina ; fifth tubercle of third 
interspace of elytron absent; frons more than half the width of the rostrum. 
Side of pronotum not or very feebly sinuate before dorsal carina ; frons less 
than half the width of the rostrum . 
Dorsal carina widely interrupted in middie . 
Dorsal carina not or feebly interrupted . . . 
_Pronotum dispersedly punctured on disc, with three rather distinct callosities. 
Species No. 
b. 
Species No. 
c. 
d. 
p- 
Species No. 
é. 
Species No. 
f 
Species No. 
g- 
h. 
Species No. 
t. 
Species No. 
Species No. 
Species No. 
J: 
k. 
0. 
Species No. 
Species No. 
l. 
Species No. 
m. 
[SM] 
bo 
wo 
10. 
al. 
15. 
17. 
18. 
12. 
16. 
5. 
Species Nos. 3 and 4. 
Pronotum dispersedly punctured, callosities hardly vestigial . 2. 2. 6 ss 
Pronotum more densely punctured . 
. End-segment of antenna luteous . . te 
End-segment of antenna rufescent- brown ; tubercles of elytra tipped with 
luteous tufts 
BIOL. CENTR.-AMER., Coleopt., ‘Vol. TV, Pt. 6, “August 1906. 
Species No. 
n. 
Species No, 
. Species No. 
2UU 
6. 
ll. 
7. 
