PHAENITHON. 359 
XXXVI. PHAENITHON. 
Anthribus, Fabr. Syst. Eleuth. ii. p. 407 (1801) (partim). 
Anthribus subgen. Phenithon, Schoenherr, Curc. Disp. Meth. p. 37 (1826) (type: costatus). 
Phenithon, Schoenherr, Gen. Spec. Cure. i. p. 158 (1833); Lacord. Gen. Col. vii. p. 550 (1866) ; 
Gemm. & Har. Cat. Col. ix. p. 2737 (1872). 
Camaroderes, Jekel, Ins. Saunders, i. p. 85 (1855) (type: viduus). 
Range: South and Central America ; numerous species. 
3 2. Rostrum very short, marginate, sharply sinuate at apex; labium heart-shaped, sinus not extended as 
far as the insertion of the palpi. Eye large, sinuate. Antennal groove triangular, prolonged downwards ; 
antenna short, shaft less than twice the length of the club, which consists of three segments, sometimes 
hardly longer than the club. Carina of pronotum strongly rounded laterally. 
The members of this genus are mostly short stout insects, but some of them are 
elongate and resemble somewhat certain species of Gymnognathus. The two genera, 
however, cannot be confounded, the strongly sinuate eye and the very short rostrum 
distinguishing Phenithon at a glance. 
Key to the Central-American Species. 
a. Pygidium variegated or clay-colour. . . . . . 1. 1 + ee ee 
Pygidium uniformly grey or white, sometimes with vestiges of two brown 
dots ... a 
Pygidium orange ; elytron blue toe Species No. 16. 
6. Sides of elytron and body dotted or marmorated . rn 2 
Sides of elytron and body not dotted or marmorated » we ff 
ec. Elytra flattened at suture, with black sutural patch or brown transverseband. d. 
Elytra not depressed at suture, without black patch or brown band k 
d. Pronotum with well-defined black basal patch on each side; sutural patch 
of elytra round . Species No. 6. 
Pronotum without distinct black basal patch . - oe an oe @ 
e. Pronotum with grey or clayish-ochraceous mesial vitta, sides dotted Species No. 1. 
Pronotum brown in centre, grey or ochraceous at sides and base Species No. 2. 
Pronotum with two brown irregular vittze . Species No. 4. 
f. Pygidium uniformly clay-colour '. . Species No. 5. 
Pygidium white, with sharply defined black spot at sides . Species No. 3. 
Pygidium with brown mesial patch Species No. 9. 
Pygidium with grey mesial lime . . . . 1 ee eee ee ee Gf 
g- Mesial vitta of pronotum complete Species No. 7. 
Mesial vitta of pronotum short; Species No. 8. 
h. Suture impressed . Species No. 5. 
Suture not impressed Loe ee a. 
i. Side of pronotum grey, with one or two brown dots je 
Side of pronotum with a grey and a brown vitta Species No. 11. 
j. Occiput with sharply defined, broad, grey mesial vitta Species No. 10. 
Occiput with thin grey mesial line or irrorated with grey. Species No. 12. 
k. Abdomen with round brown spots at sides . Species No. 13. 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 6, October 1906. 
Abdomen dotted with luteous-grey at sides 
Species Nos. 14, 15. 
3 AA 
