170 MODERN SYSTEM. 



Sp. 1. Thym. fen'ngincus. 



Inhabits beneath the bark of trees. 



Genus 99. NITIDULA. Linn., Fabr., Payk., Olivier, Marsh., 

 Leach. 



Mandibles prominent : hody short, depressed ; back plain : thorax gene- 

 rally broad: antenna with the third joint twice as long as the second; 

 club abrupt and orbicular, composed of three joints. 



Sp. 1. ]!^it. hipuxtulata. Body elliptic, brown, blackish : thorax emargi- 

 nate ; elytra with a red spot on each. 



Nitidula lupustulata. Linn., Lair., Fair., Marsh. 



Sp. 2. Nit. discoidta. {Fl. 2.Jii^. 5. a. antenna magnified.) 



Nit. discoidea. Marsh. 



Inhabits dead carcases, dried bones, hokti, and under the bark of 

 trees. 



Genus 100. IPS. Fabr., ITcrbst, Gyll, Leach. Nitidui.a. Latr. 



Mandibles prominent, strong, and luucli bent at their poiirts: body 

 elongate-quadrate ; back plain : thorar transverse-quadrate : «»«-■ 

 ieivKe with the third joint twice as long as the second; club abrupt 

 and orbicular, composed of three joints. 



Sp. 1 . Tps quadripustulatns. 



Inhabits the decayed stumps of trees under the bark. 



Genus 101. BITURUS. Latr., Leach. Ips. Olivier. Dermestes. 

 Geoff., De Gcer, Fabr. 



Antennce with the third joint not twice as long as the following joint ; 

 club composed of three joints : mandibles prominent : body oval or 

 oblong ; back plain : thorax broad behind, with the angles pointed : 

 elytra covering the abdomen. 



Sp. 1. Bit. tontentosus. Antennse shorter than the thorax : thorax 

 short, the posterior angles broadly depressed, reflected ; body oval, 

 black, with a reddish-yellow down ; antennae and feet yellow 

 red. 



Inhabits the white-thorn and umbelliferous plants in May and June. 



Genus 102. CATERETES. Hcrhst, LcUr., Leach. Brachypte- 

 Rus. Kugcllan. Dermestes. Linn., Fabr. Strongy'lus. 

 Herbst. Nitidula. Oliv. Cercus. Latr. 

 Antenna with the third and following joint scarcely differing in length ; 

 club compressed, perfoliate, obconic, composed of three joints; tho- 

 rax rounded, without angles behind : elytra very short : body de- 

 pressed, back plain : mandibles prominent. 

 Sp. 1. Cat. ruftlabris. Black, shining, with gray dowi^, 

 Cercus rufilabris. Latr. 

 Inhabits junci near Hull. 



