Which statement about Toxorhynchites rutilus septentrionalis is true?

• A. Very large, metallic blue and yellow mosquito with long strongly downward-curved proboscis
• B. Does not bite; adults feed only on nectar and plant juices
• C. Females lay eggs singly on water surfaces in tree holes or containers
• D. Larvae are predaceous, feeding on other mosquito larvae

Answer: (B)

Toxorhynchites rutilus septentrionalis are known for their adults not taking blood meals; they feed on nectar and plant juices instead. This non-biting, nectar-feeding habit is a consistent, defining behavior for the adults and is why this statement is the most reliable true description. The other statements describe traits that are either not consistently accurate for this subspecies (appearance or egg-laying) or relate to larval behavior that isn’t about what the adults do. So, the best answer is that adults do not bite and rely on nectar and plant juices for sustenance.