ALAMPYRIS.—HEMILOPHUS. 221 
fusca; antennis fuscis, articulis 3-—6™ basi testaceis ; elytris ut in A. marginella fere rectilinearibus, sed 
carina laterali magis distincta epipleurisque magis verticalibus, apice rotundatis, nigro-fuscis, marginibus 
anguste cinereo-flavis. 
‘Long. 33 lin. ¢? 
Hab. Mexico, Juquila (Salié). 
ISOMERIDA. 
Isomerida, Bates, Ann. & Mag. Nat. Hist. ser. 3, xvii. p. 373. 
The chief character which distinguishes this genus from Amphionycha lies in the nature 
of the hair fringe on the under surface of the antenne. Instead of forming a more or 
less regular range of fine cilia, it is more or less condensed into tufts under each joint, 
especially of the basal half. The third joint is never so long relatively as in Amphionycha 
and allied genera, but is in nearly all species but little longer than the fourth. The 
elytral carina forms a prominent rib. 
About eight species are known, chiefly from Tropical South America. 
1. Isomerida subdilatata. (Tab. XV. fig. 9.) 
Isomerida subdilatata, Bates, Trans. Ent. Soc. 1872, p. 229°. 
Hab. Nicaracua, Chontales (Belt, Janson). 
2. Isomerida lineata. 
Isomerida lineata, Bates, Trans. Ent. Soc. 1873, p. 232°. 
Isomerida albicollis, id. ib. 1872, p. 229° (nec Castelnau). 
Hab. Nicaragua, Chontales (Belt 1).—Sovurn America, Colombia ?. 
3. Isomerida picticornis. (Tab. XV. fig. 10.) 
Isomerida picticornis, Bates, Trans. Ent. Soc. 1872, p. 229. 
Hab. Nicaraeva, Chontales (Belt). 
HEMILOPHUS. 
Hemilophus, Serville, Ann. Soc. Ent. Fr. 1835, p. 89; Lacordaire, Gen. Col. ix. p. 885. 
The second and third joints of the antennz in this genus are thickened ; and the dense 
and long-hair clothing of the under surface is confined to these joints and, in less degree, 
to the scape, the remaining joints having the usual fine hairs. The elytral epipleure are 
high; and the carina forms a distinct rib. About a dozen species are known, all 
Tropical-American. 
1. Hemilophus prolixus. (Tab. XV. fig. 20.) 
Hemilophus prolixus, Bates, Trans. Ent. Soc. 1872, p. 229. 
Hab. Nicaracva, Chontales (Belt). 
