172 Mr. J. O. Westwood on 
strong curved spinulose sete, two of which are much stronger than 
the others. The inner lobe is produced into a rather long bifid 
horny point. Tbe maxillary palpi are of moderate length, with 
the terminal joint cylindric-ovate. 
The mentum is somewhat oblong, and rather narrowed in front. 
The lobes of the labium are slightly visible behind the base of the 
palpi, which have the middle joint angulated beyond the middle, 
and strongly setose. 
The anterior tibize are rather broad, without serrations along the 
margin, and with three obtuse teeth; the middle and hind tibize 
are denticulato-setose in the middle; the calcarize of the four hind 
feet are long, and the ungues are simple. 
The male, in addition to the upright horn at the front of the 
head, is distinguished by having the front of the thorax rather 
retuse, and furnished with two small tubercles. 
Sp. 1. Geobius Dorcas. 
Copris Dorcas, Fabr.* Ent. Syst. Suppl. p. 31; Syst. 
Eleuth. i. p.44; Germar in Silb. Rev. Ent. vol. iv. p. 
112; Guérin, Icon. R. An. Ins. texte, p. 81 (A giaha 
Dorcas), pl. 22, fig. 1. (4% gialia cornifrons.) 
Aigialia cornifrons, Dejean olim. 
Geobius cornifrons, Brullé, Exped. Se. de Morée, Ins. p. 
173; Laporte, Ins. Col. vol. ii. p. 108. 
Hybalus cornifrons, Dej. Cat. 
2? glabratus, Pk. teste Dej. Cat. 
Habitat Ital. merid., Sicilia, Corfu, (Barbaria, teste De}j.) 
Sp. 2. Geobius barbarus, Lap. Op. cit. 
G. levicollis, De}. Cat. sine discr. 
Habitat Algeria. 
Triopontus, Westw. 
(Pl. XII. fig. 4a—4e, and details.) 
Corpus ovale, depressum, fere Colymbetis pedibus posticis sub- 
elongatis. Caput in mare cornu erecto medio, foemine inerme. 
Labrum exsertum transversum, margine antico fere recto, 
angulis rotundatis. Mandibule lateribus detectis, 3-dentate, 
dente interno in mandibula dextera, minimo fere inconspicuo. 
Mawxille fere ut in Geobio, lobo supero longiori, spinulis cur- 
* In the first of these works Fabricius gives Tangier as the habitat of this 
species, and in the latter Mauritania. 
