THRYALLIS.—GYMNOCERUS. 131 
THRYALLIS. 
Thryallis, Thomson, Archiv. Ent. i. p. 409 ; Lacordaire, Gen. Col. ix. p. 719. 
This genus is characteristic of the fauna of Mexico and the countries immediately 
adjoining. 
1. Thryallis maculosus. (Tab. IX. fig. 1.). 
Thryallis maculosus, Thomson, Archiv. Ent. i. p. 409°. 
Hab. Mexico }, Orizaba (Sailé). 
2. Thryallis sallzi. 
T. maculoso similis, sed latior, precipue postice latius rotundatus, minus convexus, multo subtilius punctulatus, 
elytris lateraliter abruptius declivibus. Fuscus, breviter griseo- pubescens ; capite supra et infra oculos 
thoraceque lateribus carneo-vittatis; elytris pone medium juxta margines carneo-maculatis, supra post 
medium utrinque maculis tribus (e tomento elevato nigro) transversim recte ordinatis, maculaque magna 
sub humeros, alteris indistinctis prope basin et apice nigris ; femoribus apice tiblisque medio carneo-annu- 
latis; episternis carneo-maculatis ; antennis( ¢ ) corpore duplo longioribus, nigris, articulis a tertio dimidio 
basali griseis. 
Long. 5h lin. CO. 
Hab. Mexico, Cuernavaca (Sallé). 
One example in M. Sallé’s collection. 
3. Thryallis undatus. 
Thryallis undatus, Lacordaire, Gen. Col. ix. p. 720, nota!. 
Hab. Mexico}, Toxpam (Sailé). 
4. Thryallis leucophzus. 
Anisocerus leucopheus, White, Cat. Long. Col. Brit. Mus. ii. p. 4071. 
Hab. Guatemaza (Deby 1), San Juan, Vera Paz (Champion). 
| CHALASTINUS. 
Chalastinus, Bates, Ann. & Mag. Nat. Hist. ser. 3, ix. p. 447. 
Four species of this handsome genus are known, all Tropical-American. 
1. Chalastinus rubrocinctus. (Tab. IX. fig. 3.) 
Chalastinus rubrocinctus, Bates, Trans. Ent. Soc. 1869, p. 385°. 
Hab. Nicaracua, Chontales (Belt 1, Janson). 
GYMNOCERUS. 
Gymnocerus, Serville, Ann. Soc. Ent. Fr. 1835, p. 84. 
Peculiar to Tropical America. Eight species have been described. 
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