'larvae-bearing' is a compound formed from 'larvae' (the plural of Latin 'larva') and English 'bearing' (from Old English 'beran', 'to carry').

'larva' originates from Latin 'larva' meaning 'ghost' or 'mask'; in scientific usage it came to denote an immature form of an animal, yielding the English plural 'larvae'. 'Bearing' comes from Old English 'beran' → Middle English 'beren' → modern English 'bear' with the gerund/participle form 'bearing'. These elements combined in modern English to form the descriptive compound 'larvae-bearing'.

Originally Latin 'larva' meant 'ghost' or 'mask'; over time it shifted in biological contexts to mean an immature animal form (now 'larva'/'larvae'), and 'bearing' retained the sense 'carrying', so the compound now means 'carrying or producing larvae'.