| 31. | Walt, while finishing up, sees a house fly in the lab which he fears could contaminate the process.
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| 32. | When Katya or I catch a moth or a house fly and call out, " Insect, insect !"
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| 33. | The Peneparoxyna is a winged creature that has a similar build to the house fly or horse fly.
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| 34. | They are not house flies, but rather cluster flies and do not carry disease as house flies do.
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| 35. | The rooms, though kept neat by constant maternal labor, are breeding places for house flies and other bugs.
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| 36. | House flies in the family Muscidae, mainly those in the genus " Sarcophaga ", are facultative parasitoids of Arionidae.
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| 37. | To consume a house fly ( " Musca domestica " ), even large adult females need almost one hour.
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| 38. | They include many familiar insects such as house flies, blow flies, mosquitoes, gnats, black flies, midges and fruit flies.
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| 39. | Fruit flies _ there are many species of them _ are generally about the size of a house fly.
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| 40. | But they get a lot closer before attacking a house fly maggot, which naturally enough is less likely to bolt.
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