232 J. L. LECONTE, M. D. 



% . — Eighth ventral segment truncate and subemarginate at tip, deeply longi- 

 tudinally impressed. 



Southern, Middle and Western States. 



Group 5. — cordatus. 

 In this group the side margin of the prothorax is acute, and the 

 flanks deeply but narrowly concave j the prosternal sutures are obliter- 

 ated, and the coxal fissures are short and closed: the hind angles are 

 obtuse. The mandibles vary in form according to species, but the 

 apical part is slender. 



Head and protliorax subopake, the former convex 2. 



Head and prothorax opake, densely granulated, the former flat .3. 



2. — Black, antennae, tibiae and tarsi testaceous- brown ; elytra pale yellow, with 

 the basal margin and sutural bead blackish .38. basniis. 



Black, antennse, tibite and tarsi dark testaceous; elytra with the basal half 



black, the apical half pale yellow 39. diiuidiatus, n. sp. 



3. — Legs yellow, elytra with a dusky sutural cloud 4. 



Legs pale fuscous, body brown, elytra fusco- testaceous 40. opaculus. 



4. — 3.5 mms. long; prothorax wider than long 41. cordatus. 



1.7 mms. long; prothorax scarcely wider than long 42. foi'Cij»atus. 



38. B. ba!iialis, Lee. New Spec. Col. (Smithsonian 8vo), 54. — Black, head 

 subopake, very finely granulate; not densely but finely punctured; convex; 

 antennal ridges very small, frontal impressions indistinct; epistoma with 

 the front angles slightly prominent. Antennse testaceous, first and last joints 

 darker. Prothorax a little wider than long, sides nearly' parallel in front, 

 then obliquely rounded, hind angles obtuse, not very distinct; disc convex, 

 strongly, though finely punctured, dorsal line indistinct. Elytra finely not 

 Mensely punctured, pale yellow, base and narrow sutural margin blackish ; 

 sutural angle not much rounded. Dorsal segments shining, sparsely, the ven- 

 trals less sparsely punctulate. Legs piceous, tarsi and posterior tibife testa- 

 ceous. Side margin of prothorax acute, flanks narrowly but strongly con- 

 cave, prosternal sutures obliterated, coxal fissures short, closed. Mandibles 

 obtusely toothed, apical part not very long, slender. Length 2.5 — 3 mm ; 

 .10— .12 inch. 



%. — Eighth ventral segment with a small deep triangular impression. 



Atlantic coast, New York to Florida. The specimens from the 

 latter locality are larger, with the elytra rather more strongly punc- 

 tured, but do not otherwise differ. 'J'he bristles of the posterior 

 abdominal segments are longer in this and the other species of tliis 

 group than in any of the preceding groups. 



39. B. diillidiatus, n. sp. — This si)eeies resembles the preceding in all 

 respects, except that tlie prothorax is very distinctlj* wider than long, and less 

 deeply punctured. The elytra are more strongly punctured, and the basal half 

 is black, the apical half pale yellow; the cpipleurte are entirely black, and 



