The description of B. krusemani shows that this nominal taxon, known from a single location, diverges slightly in colour pattern from the otherwise widespread, common and variable Central American species, B. brachycephalus . Until more evidence to the contrary is available from critical studies of patterns of variation, I shall treat them as parts of a single variable species. S Nearctic, N Neotropical Regions.
Further evidence is awaited.
S Nearctic Region.