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Tribe VI. — Aleocharides. 



The antennae inserted between the eyes, opposite their internal margin, but 

 not beneath the lateral margins of the head ; the labrum entire, truncated ; the 

 terminal joint of the maxillary palpi conical or subulate ; the head either concealed 

 or with a distinct neck ; the abdomen, in the living insect, extended lengthwise ; 

 the legs unarmed or spinose in a very few ; the tarsi pentamerous. 



i. The maxillary palpi elongate, the terminal joint conical and acute. 



A. The antennae incrassated in the middle, with the first joint slightly the 

 largest. 

 Genus I. — Dinarda, Leach, dentata. 1. 



b. The antennae slender towards the extremity, subsetaceous, the first joint 

 very robust, the apex emarginate. 

 Genus II. — Lomechusa, Grav. strumosa, paradoxa, emarginata. 3. 

 ii. The maxillary palpi short, the terminal joint subulate. 



A. The antennae filiform, not geniculated, the joints equal ; the mouth form- 

 ing a rostrum ; the four anterior tibiae spinose. 

 Genus III. — Gymnusa, Karsten. brevicollis, dubia. 2. 



b. The antennae geniculated at the base, thickened towards the extremity ; 

 the mouth not rostrated ; the tibiae hirsute or pubescent, not spinose. 

 1. The head more or less withdrawn beneath the thorax ; the body pos- 

 teriorly more or less attenuate ; the anterior angles of the thorax 

 muchdepressed. 

 «. The antennas short, more or less thickened in the middle, the third 

 joint more than twice as long as the second ; the body generally 

 robust ; the thorax convex, narrower than the elytra ; the elytra 

 often very short ; the legs hirsute ; the first joint of the tarsi 

 slightly the longest. 

 Genus IV. — Aleochara, Auct. fuscipes, tristis, bipunctata, intricata, 

 carnivora, maerens, haemorrhoidalis, lanuginosa, villosa, fumata, laevigata, brevi- 

 pennis, pulla, nitida, bilineata, morion, exigua. 17. 



&. The antennae short, slightly thickened towards the extremity, all the 

 joints equal, the terminal one only the largest and oblongo-ovate ; 

 the body elongate and tapering ; the thorax broader than the 

 elytra, laterally rotundate and deflexed ; the legs pubescent, the joints 

 of the tarsi equal. 

 Genus V. — Sphenoma, Mann, abdominale. 1. 



y. The antennae somewhat longer, slightly thickened towards the apex, 

 the second and third joints nearly equal ; the body narrowed pos- 

 teriorly ; the elytra of about the width of the thorax ; the legs 

 pubescent, the first joint of the tarsi a little longer than the following. 



