CABABIDtE. — LEISTUS. 63 



X Sp. 1. castaneus. Piceo-castaneus, ore, antennis pedibusque rufu-fcrrug-ineis, 



elytris punctato-striatis. (Long. corp. i^- lin.) 

 Al. castaneus. Bonelli. — Steph. Catal. Ah. 88. 



Piceous-chesnut, with the mouth, antennsej and legs rusty-red. the elytra 

 striated, the striae with distinct rather remote impressed dots. 



I have seen but one indigenous specimen of this insect, which 

 agrees with a specimen I received from M. Lefebure by the name 

 above adopted, and which was taken by Dr. Leach near Ashburton, 

 Devon, and by him given to the British Museum. 



Genus XXIII. — Leistus, Frolich. 



Palpi much elongated, slender ; labial with the two basal joints very short, the 

 following very long, slender, the terminal externally clavate, and obliquely 

 truncated; external niaxiUary palpi with the basal joint minute, second elon- 

 gated, rather stout, following abbreviated, terminal shorter than the second, 

 a little clavate, obliquely truncate : mandibles acute, externally dilated ; 

 maxillas with the outer edge at the base armed with strong spinous processes : 

 mentum transverse, emarginate, with a slight notch in the middle ; labium 

 elongated, attenuated at the apex, which is furnished with a strong spine on 

 each side. Antenna; long, setaceous, four basal joints naked, second and 

 fourth shortest, fifth longest : thorax short, cordate : eyes prominent : body 

 oblong : wings two : legs rather elongate : anterior tarsi of males a little 

 dilated. 



This curious genus is easily known by the singular spinous pro- 

 cesses at the base of the maxillae, and by the dilatation of the base 

 of the mandibles externally : the structure of the lip also furnishes 

 a good character, as well as the elongated palpi. The species are 

 generally very beautiful, very lively, and active: they usually 

 occur beneath the bark of trees, stones, and moss, or among dead 

 leaves ; and are frequently taken in hedges while prowling after 

 their prey. 



Sp. 1. spinibarbis. Cyaneus, ore, antennis pedihusque rufo-testaceis, aut Irunncis. 



(Long. corp. 3^—4^ Hn.) 

 Ca. spinibarbis. Fabricius. — Steph. Catal. No. 89. 



Depressed, rather broad ; the mouth, antennse, and legs testaceous-red : head, 

 thorax, and elytra cyaneous, or blue-green, the latter rather deeply striated, 

 the strife with impressed dots, ten in number, the sutural one abbreviated, 

 and the marginal deeply punctate : the thorax is shining, shghtly convex, with 

 a longitutlinal channel, the base and anterior margin punctate, the sides 

 punctulated, and sometimes reddish : the body beneath black. 



Var. fi. AVith the legs pale ochraceous, and the margin of the thorax testaceous. 



Frequently met with, not only in the metropolitan district, but 



