102 ADEPHAGA. [BemhicUum. 



A. Frontal furrows plain and distinct near the interior border of the eyes. 



a. Frontal furrows double. 



Groiip III. (Campa, Mots.) 



B.fumiffatum, assimile, Clarki. 



b. Frontal furrows single. 



a*. Frontal furrows very deep, meeting or almost meeting together and 

 forming a V with the point towards the mouth. 



Group IV. (liopha, Megerle, pars.) 

 B. articulatiim, Sttcrmi, dor is. 



\t*. Frontal furrows not very deep or regular, parallel, or only slightly 

 convergent. 

 af. P^lytra unicolorous. 



aj. Length not exceeding 3 mm. 



Group V. (Leja, Megerle.) 



B. lampros, nigricorne, gilvipes, Schiij)peH,normannum,pusilluin. 

 bj. Length not less than 4^ mm. 



Group YI. (Peryphus, Megerle, pars.) 



£. tibiale, atroccerideum, decormn, monticola, nitidulum, 

 ajjine, stomoides. 



bf. Elytra with light yellow or orange miirkings. 

 Group VII. (Iiopha, Meg. pars, Peryplius, Meg. pars.) 



S. quadrimaculatum, quadriptcstulatum, quadriguttatiim, testaceum, 

 saxatile, anglicanum, femoratum, bruxellense, concinnum, littorale, 

 Jluviatile, lunatum. 



B. Frontal furrows obsolete, forehead and anterior angles of thorax puuctured. 

 Group VIII. (Notaphus, Stepli. pars.) 

 S. hipunctatum, pallidipenne. 

 ii, Slriac of elytra complete, all entire, distinct to apex. 



Group IX. (Notaphus, Steph. pars.) 

 B. Jiammulatum, varium, adustum, ohliquum, eph/ppium, prasinum, 

 punctulatum. 



II Anterior margin of thorax with lateral angles projecting; apex of mctasteruum 

 not boidered between intermediate cox;e. 



Group X. (Sracteon, Bedel.) 



B. paludosum. 



The species may be divided as follows with regard to their colour : it 

 must be remembered, however, that, although the colour is very coustant 

 as a rule, yet there is occasionally a slight variation owing to immaturity, 

 some of the usually immaculate species showing traces of indistinct 

 lighter patches at apex of elytra, if slightly immature. 



1. Coppery, with dull impressed patches on elytra : B. paludosum. 



2. Bronze, unicolorous: B. 2^i<}^c(ulaiiim, bipunctafum (comparatively dull) j B. 

 lampros, nigricorne (very shiny;. 



