1	Elytra orange or yellow without spots	B. bipartita Mulsant
–	Elytra with spots or some marks	2
2	Dorsal color mainly black or dark brown	3
–	Dorsal color mainly yellow, orange, or pale gray	17
3	Elytra with apex of elytral suture dentiform	B. mimica sp. nov.
–	Apex of elytral suture not dentiform	4
4	Elytra black with lateral and apical borders yellow	B. guatemalensis (Gorham)
–	Each elytron with one to five spots	5
5	Pronotum with two convergent discal spots, each elytron with five pale spots	B. fenestrata Gorham
–	Pronotum without discal convergent spots, elytral maculation variable	6
6	Each elytron with five pale spots	B. octostigma Mulsant
–	Elytra with different maculation	7
7	Elytra black with a large orange macula covering lateral margin	B. aurantiapleura sp. nov.
–	Elytra with different maculation	8
8	Each elytron with three pale spots: one near the scutellar shield and two near the elytral apex	B. tica sp. nov.
–	Elytra with different maculation	9
9	Males with setal tuft on center of first ventrite, male genitalia symmetrical	B. isthmena sp. nov.
–	Males without setal tuft on center of first ventrite, male genitalia asymmetrical	10
10	Males without humeral spot and without cusps on third ventrite, male genitalia asymmetrical	B. indubitabilis Crotch
–	Males with humeral spot. Third ventrite of male with two cusps, male genitalia asymmetrical.	11
11	Fourth ventrite with cusps	B. barberi Gordon
–	Fourth ventrite without cusps	12
12	Penis guide of male genitalia with apical hook	13
–	Penis guide of male genitalia without apical hook	15
13	Apical hook of the penis guide curved and robust	B. robustihamata Nestor-Arriola and Toledo-Hernández
–	Apical hook not curved or robust	14
14	Cusps on third ventrite very conspicuous parameres of male genitalia robust and with a tooth on superior margin	B. dentipes (Fabricius)
–	Cusps moderately conspicuous, parameres without tooth	B. bistripustulata (Fabricius)
15	Elytron black without spots, apical margin of elytron red or orange	B. erythrura Mulsant
–	Elytron spotted	16
16	Cusps medium sized	B. subfasciata Mulsant
–	Cusps large	B. truncata Nestor-Arriola and Toledo-Hernández
17	Elytra yellow with pale brown lines	B. aperta Weise
–	Elytra with black spots	18
18	Each elytron with a large basal macula	B. papiliona sp. nov.
–	Elytra without a large basal macula	19
19	Protibia, mesotibia and metatibia toothed, two spots on each elytron	B. hexaspina sp. nov.
–	Mesotibia and metatibia without tooth, maculation variable	20
20	Elytra pale with several elongated black spots, tibial tooth small	B. gorhami (Weise)
–	Elytral spots rounded, not elongated	21
21	Pronotum mainly black with only lateral borders, anterior border and middle line until center of the disc pale colored. Each elytron with five black spots	B. nubes sp. nov.
–	Pronotum variable, if mainly black with several pale colored projections into the basal black macula. Elytra variable	22
22	Elytra yellow with five black spots on each elytron, pronotum with several black small spots	B. invertita sp. nov.
–	Each elytron with two black or brown spots, elytral suture black or with a large dark macula	23
23	Male abdomen with central part of ventrites depressed and with dense, long pubescence	B. cachensis Gorham
–	Male abdomen without long pubescence	24
24	Dorsal color mainly yellow, orange or pink, sometimes dark with 12 pale spots; male abdomen without modifications	B. lepida Mulsant
–	Dorsal color yellow. Male abdomen with acute tooth in middle of first and second ventrites	B. dentata sp. nov.