BUACIIINUS. 27 



Head and thorax rcd-hrown ; tliird and foin'th joints of 

 antennae generally l)lack at base ; elytra l)lacki.sli lilue, 

 Avith shallow striae; abdomen and sides of breast ])laekish- 

 l)ro\vn. Common. B. crcpit((nx, Lin. 



b. Entire breast and abdomen blackish-l:)ro\vn ; length 

 2—8 lines. 



Head and thorax red-brown ; third and fourth joints of 

 antennae generally black at base ; elytra blue or green, 

 somewhat lustrous, striae almost or entirely absent. Rare. 



B. ex'plodcns, Duft. 

 J^. Suture of elytra i-ed at l)ase. 



Head and thorax red-brown; elytra blue or greenish, 

 base of suture red ; breast and abdomen red. Antennae 

 unicolorous. L. 2 — 3 1. Eare. B. s clop eta, Fab. 



LEBIIDES. 



A, Paragiossae free at apex. 



Head often divided by a neck from thorax. 



I) r llpt idi(< . 

 J?. Paragiossae completely soldered to ligula. 



Head seldom divided from thorax by a neck ; anterior 

 tibiae scarcely dilated toward a])ex, generally unarmed on 

 outer-side ; anterior tarsi in the male usually only slightly 

 dilated, clothed beneath with fleshy prominences. 



Lcbiidca. 



nBirTinuA. 



A. Apical joint of palpi hatchet-shaped. 



Head triangular, neck thick ; base of antennae hairy, 

 the first joint as long as head, thickened at apex ; emargina- 

 tion of mentuni without any tooth ; ligula elongate and 

 narrow, paragiossae narrow, much shorter than ligula; 

 thorax long, almost cylindrical, without a side border ; 

 tarsi hairy beneath, fourth joint Ijilobed. First three joints 

 of male anterior tarsi slightly dilated, more strongly fringed 

 on inner-side. Drypta, Fab. 



a. A])ical joint of palpi somewhat clublike, strongly 

 truncate at apex, 



