BOLAX.— LETTCOTHYEETJS. 295 



The two following, the first recorded from north of the Isthmus of Panama, are among 

 the largest and finest species of the genus. 



1. Bolax magnus. (Tab. XVII. fig. 6.) 



B. andicolce (Burm.) affinis, tibiis posticis gracile suratis. Major, elongatus, postice dilafcatus, niger, nitidus, 

 abdomine elytrisque fulvo-testaceis, his utrinque plus minusve distincte fusco-trivittatis ; capite cum 

 thorace sparse umbilicato-punctato ; clypeo brevi et lato, obtusissime rotundato ; thorace ante medium 

 angulatim dilatato, postice sinuatim mediocriter angustato, angulis posticis rectis, anticis acutis, dorso 

 medio aequaliter convexo, lateribus antice et postice transversim depressis; elytris punctato-striatis, 

 interstitiis alternatim sparsius et densius punctatis, punctis nonnullis transversim confluentibus ; pygidio 

 grosse sed haud profunde sparsim transverso-punctato. 



Long. 15-21 millim. rf 2 • 



Sab. Panama, Bugaba 1000 feet, Volcan de Chiriqui 2000 feet {Champion). 

 Found in abundance by Mr. Champion in the forest-region of Chiriqui. 



2. Bolax flaveolus. (Tab. XVII. fig. 7.) 



B. magno proxime affinis ; B. andicolce quoad colores similior, sed differt metasterno flavo elytrisque nullo 

 modo sulcatis. Ochraceo-testaceus, capitis thoracisque marginibus nigro-fuscis, capite infra cum partibus 

 oris, pedibus totis, mesosterno et metasterni episternis nigris nitidis ; capite, clypeo et thorace sicut in 

 B. magno elytrisque sat crebre transversim punctato-rugulosis ; pygidio grosse sed haud profunde sparsim 

 transverso-punctato. 



Long. 15-20 millim. d 1 $ . 



Hab. Nicaragua, Chontales (Belt, Janson). 

 Eight examples. 



LEUCOTHYREUS. 



Leucothyreus, MacLeay, Horae Ent. i. p. 145 (1819) ; Burmeister, Handb. der Ent. iv. 1, p. 493 



Lacordaire, Gen. Col. iii. p. 384. 

 Aulacodus, Eschscholtz, Entomographien, p. 76 (1823). 

 Bolaxoides, Castelnau, Hist. Nat. Ins. Col. ii. p. 140 (1840). 



Similar in distribution to Bolax, but extending further southwards to the banks of 

 the Plata. One species has been recorded from Tahiti. The described species amount 

 to upwards of fifty. 



1. Leucothyreus femoratus. (Tab. XVII. fig. 9.) 



Leucothyreus femoratus, Burm. Handb. der Ent. iv. 1, p. 497 \ 



Hab. Mexico, Jalapa (Edge) ; Costa Rica (Adams) ; Panama, Volcan de Chiriqui, 

 Caldera, Tole (Champion). — South America, Venezuela 1 . 



The hind femora of the male are described by Burmeister as having at the base a 

 high projecting keel. In the numerous examples I have examined this is a broad 

 triangular tooth, slightly reflexed and margined. The size is 10 to 11 millim. 



A Chiriqui specimen is figured. 



