AMERICAN COLEOPTERA. 1'5' 



A very singular little species belonging to the group eoxe7ulix of 

 my monograph. It seems best placed between scidptaratum and 

 7^obusticolle. 



It is known to me by one female from Cedar Co., Iowa. 



B. dilatatuni Lee. 

 B. platydernm Chaud. is synonymous with this species. 



B. riifotiiictuni Chaud. 



Tins name must be substituted for hUmchardi Hayw. A com- 

 parison of the types shows that the two are identical. Under his 

 description Chaudoir gives no locality, merely stating that it was 

 received from Guex. The "faux air de planum'' mentioned is 

 quite expressive. 



B. viridicolle Laf.— Form moderately elongate, slightly depressed. Color 

 dark £eueoHS or nearly black, the head and thorax distinctly tinged with green 

 and strongly alutaceous, the elytra more finely alutaceous, with an ill-defiued mar- 

 ginal spot about one-third from base extending inwards as far as the fifth inter- 

 space and also for some distance along the margin, a more distinct apical spot and 

 the inflexed portion pale. Head as wide as the thorax at apex ; eyes large, promi- 

 nent- frontal grooves distinct; antennje about one-half as long as the body, 

 rufous, the outer joints scarcely darker; palpi rufous. Prothorax subcordate, 

 about one-half wider than long, distinctly narrower at base than apex ; apex sub- 

 truncate ; transverse impressions nearly obsolete ; median line very fine, abbrevi- 

 ated at each end: basal impressions distinct, bistriate ; base subtruncate; sides 

 with the margin verv narrowly reflexed, strongly arcuate, .sinuate in front of the 

 hind angles, wliich are subrectangular and very finely carinate. Elytra oblong- 

 ovate, about one-half wider than the thorax, finely striate ; stride distinctly punc- 

 tate to behind the middle, the first, second and fifth entire, the latter grooved at 

 tip- intervals nearly fiat ; dorsal punctures on the third interval, the first about 

 one-third from base, the second about one-third from apex. Body beneath 

 nearly black. Legs rufous. Length .20 inch ; 5 mm. 



The apical spot referred to in the description is apparently com- 

 posed of a subapical and an apical one united, that of the two elytra 

 together having somewhat the form of a horse-shoe, as remarked by 



Chaudoir. 



It is closely allied to cordatwn and should be placed in our lists 

 between that species and nubiculosum. To the kindness of Mons. 

 Oberthiir I am indebted for an opportunity of studying La Ferte's 



type. 



I have compared an example of hamiferum Chaud., received trom 

 Mons. Oberthiir, with the type of viridicolle, and can detect no 

 difference between them. As the specimen of havviferum had been 



TRANS. AM. ENT. SOC. XXVII. JANUARY, 190L 



