CLASS V. INSECTA. 173 



Division II. — Anterior margin of the head circumscribed hy a curved line, 

 the antenntz inserted on this side of the level of the line. Elytra covering 

 half' the abloincn or more. Thorax generally longer than broad, or tcith 

 equal diameters. 



Subdivision 1. — Maxillary palpi longer than the labial one, with their 

 extremities thickest ; the last joint obscure. Body linear. Head with a 

 distinct neck. Thorax orbicular or cylindric. 



Genus 106. P/EDERUS. Fabr., Oliv., Latr., Payk., Lam., Gravenh., 

 Leach. Staphvlixus. Linn., Geoff., I)c Gcer. 

 Antenna inserted before the eyes, insensibly tliickening towards their 



extremities ; th.e third joint very long : eyes moderately large. 

 Sp. 1. Pad. ripariits. Body red, shining: head, antenna; (four basal 



joints excepted j, apex of the abdomen, and knees, black: elytra 



blue, with white impressed dots. {PI. -i.fg. IQ.) 

 ra;derus rijiarius. Fabr., Latr., Oliv., Gravenh. Staphyiinus riparius. 



Li)in. 

 Inhabits banks and under stones. 



Ob3. — Paderus orbiculatus is the type of the Genus Rugilus of 

 Leach. 



Genus 107. STENUS. Latr., Cuv., Imm., Fabr., Payk., Gravenh., 



Leach. 

 Antenna inserted at the exterior margin of the eyes, abruptly thicker 

 at their extremities, the inferior joints cylindric, the outer ones co- 

 nic globose : eyes nearly globose, large. 



* Tongue Ions, anus zcithout seta. 



Sp. 1. Stenus biguttatns. Black, with gray down, minutely punctate, 

 somewhat rugulose : vertex of the head with an elevated line : tho- 

 rax behind with an impressed little line; each elytron with a reddish 

 round spot. {PI. 4.fg. 13.) 



Staphyiinus giittatus. Linn., Marsh. Stenus biguttatus. Fzbr., Payk., 

 Gravenh., Latr. 



** Tongue obsolete. Anus rciih two seta. 



Genus Dianous. Leach. 

 Sp. 2. Stenus carulescens. Gyllenhall. 



Subdivision 2. — Maxillary palpi not wuch longer than tJ:s labial, not 

 thicker at their extremities ; the last joint distinct. 



A. Mandibles strong, with their external edge with one or more tccfh. 



Head free. 

 a. The second, third, and fourth joints of the tarei very shorl: 



the last joint as long as the others united. 



