386 INSECTA. 



Stenolophus, Zieg. Dej. 



The Stenolophi only differ from the Ophoni in the form of the pe- 

 nultimate joint of the four anterior tarsi, at least in the males, and 

 in some even of the posterior; it is divided down to the base into 

 two iKibes *. 



AcuPALPUs, Lat. — Stenolophus, Dej. 



The four anterior tarsi of the males differing but little from the 

 intermediate joints ; rounder, almost granular, and pilose ; exterior 

 palpi terminating by a joint with a pointed extremity. 



They are very small insects, and seem to be allied to Trechus f . 



4. The fourth section, that of the Simplicimani J approaches the 



* Stenolophus vapor ariorum, Dej. lb. ; Carahus vaporariorum, L. ; Panz., Faun. 

 Insect. Germ., X^^I, 7 ; Harpalus saponarius, Dufour. Senegal. 



•f- The Stenolophi of the Catalogue, Dej., the preceding one excepted. "We will 

 name, among others, the Carahus meridianus, Lin. and Fab., and the C. vespertinus, 

 of Panzer, XXXVII, 21. 



X This section in the system of Dejean, forms his tribe of Carabiques Feroniens, in 

 which — Spec. Gen. des Coleop. Ill — he has established several new genera. Those 

 male Feroniae, in which the two first joints of the two anterior tarsi are alone dilated, 

 are comprised in the genera Pogonus, Cardiaderus Baripus, and Patrobus. 

 In the two first, the last joint of the labial palpi is oval or pointed, whilst in the 

 other two it is almost cylindrical, truncated at the extremity, and slightly securiform. 

 The second — Daptus chloroticus, Fischer — diflfers from the first in the thorax, which is 

 convex, cordiform, and narrowed posteriorly. In Baripus, it is convex and almost 

 oval. That of Patrobus is plane, narrowed posteriorly and more or less cordiform. 



In the other male Feroniie the three first joints of the anterior tarsi are dilated. 

 A first subdivision comprehends those Fei-ouia;, the hooks of whose tarsi are den- 

 tated, and among these the genus Dolichus is the one in which the tooth of the 

 middle of the emargiuation is simple, that is to say, entire. That which he names 

 Pristonychus, is identical with my Ctcnipus : to this he refers the Sphodrus tern- 

 cola of his Catalogue. His new genus Pristodactyla closely resembles Taphria, 

 but the last joint of the palpi is elongated and almost cylindrical, and the thorax is 

 oval. He describes but a single species. 



Among the Feronise in which the hooks of the tarsi are simple, four genera, 

 Omphreus, Olisthopds, Masoreus, and Antarctia, are removed from all the 

 others by the absence of a tooth or lobe in the middle of the emargination of the 

 mentum. The first, of which Count Dejean has only seen the females, is very dis- 

 tinct by the length of the first joint of the antenna which equals that of the three 

 following ones ; and then by its palpi, the last joint of which is strongly securiform. 

 That naturalist places this genus directly after Sphodrus ; perhaps it may come 

 among the Patellimani, and approximate to Rembus andDicaelus. The second genus, 

 Olisthopus, belongs to that division in which the three first joints of the anterior 

 tarsi of the males are elongated, and very slightly triangular or almost square ; its 

 type is the Agonuni rotundatum of Sturm. The other two re-enter the division of 

 those in which the three first joints of the two anterior tarsi of the males are but 

 slightly elongated ; they are as long as they are wide, and strongly triangular or 

 cordiform. The thorax in Masoreus is transversal, rounded laterally, and slightly 

 prolonged in the middle. That of Antarctia is more or less square or cordiform, and 

 slightly or not at all transversal. The Hurpalus ckcumfusus of Germar, referred by 

 us to Tetragonoderus, is an Antajctia. 



Six other genera, Trigonotoma, Catadromus, Lesticus, Distrigus, Abace- 

 Tus, and Microcephalus, form, among the Feroniae with tarsi analogous to those 

 of the last, a small section, the character of which consists in a trilobate or slightly 

 emarginated mentum (u). The last genus, that of Microcephalus, is very distinct from 



(a) The ordinary tooth in the middle of the mentum is very large, and thus forms a 

 lobe which diminishes the extent of the emargination. 



