STENID.E. MEDOM. 273 



OcuU magni, 



^««<s baud setiferus; ?a5iM7» elongatum : . 526. Stektts. 

 bisetis ; labium breve : . . . 527- Dianous. 



Palpi Jabiales securiformes : labrum bilobum : . . 528. Oxyporus. 

 T'jZiitE anteriores denticulatfe : ..... 529. Siagonium. 



Tarsi 3-4 articulati : (Oxytelid^.) 

 AntenticB fract^. 



Tibice anteriores denticulato-pectinatas. 



Ca/7Mf cornutum, aut tuberculatum : . . 530. Bledius. 



inerme: 531. Hesperophilus. 



T'iJi^ omnes inermes : 535. Trogophlteus. 



yintcnnm baud fractae. 



T'iiiiE postic£e denticulato-pectinatae : . . . 532. Platysthetus. 

 inermes ; anteriores denticulato-pectinatae. 

 TAorax depressus, gculptus : . . 533. Oxytelus. 

 convexus, exsculptus : . . 534. Aploderus. 

 Tibia- onines inermes : 537. Carpalimus. 



Genus DXXI. — Medon mihi. 



Antennce filiform, the basal joint longest and stoutest, the second short 

 obconic, third nearly as long again as the second, subclavate, fourth slightly- 

 longer than the second, fifth and two following as long as the second, ob- 

 conic, three next turbinate, apical one the same, with the tip obliquely cut 

 out. Palpi unequal, maxillary (Z>) with the third joint elongate-lanceolate, 

 the fourth minute, subulate ; labial (c) with the second joint subovate, the 

 terminal slender, acute : maxillce (a) bilobed within and densely ciliated : 

 mandibles (e) curved, acute, with four sharp denticulations within : labrum 

 (d) with two short teeth in front : head quadrate : e^es minute : thorax also 

 quadrate, slightly narrowed behind : elytra obliquely truncate towards the 

 suture : abdomen attenuated at the tip, the terminal segment very long ; 

 legs slender ; tibice simple ; tarsi (f) pentamerous, with the fourth joint 

 entire. 



In contour the only known species of this genus greatly resembles 

 those of the following; but its comparatively gigantic bulk, without 

 attending to its other characters, would serve to distinguish it : — 

 from Sunius it differs in having the labrum denticulate, and from 

 Astenus by having the fourth joint of the tarsi simple; from 

 Rugilus and Paederus it differs in the form of the thorax, as well as 

 in other characters. 



•j-Sp. 1. Ruddii. Plate xxvii. f. 2. a-f. — Niger, nitidus, ore, antennis, elytrig 



pedibus anoque piceo-rufis. (Long. corp. 3^ lin.) 

 Medon Ruddii. Steph. Nomen. ^d edit. col. 103. 



Mandibulata. Vol. V. 30th Nov. 1833. t 



