My explanation

It was my unhappy task to explain it to him.With heavy heart I knocked on his office door.  Come in,’ came the muffled cry. I entered to discover the room darkened except for a single small lamp illuminating the stage of the microscope at which he was working. In these gloomy surroundings I stumbled through my explanation. I had found a very different kind of fly. I was sure it had emerged from one of the pupae in the molasses. I didn’t mean to disturb Muller but  Does it lookmore like Lepidoptera than Diptera?’ he asked, his face illuminated from below. I didn’t know what this meant, so he had to explain:  Does it have big wings? Does it have feathery antennae?