The larvae are whitish and resemble mealworm grubs. The hemolymph of the mealworm beetle "Tenebrio molitor" contains several antifreeze proteins. Numeracy has been described in the yellow mealworm beetle ("Tenebrio molitor") and the honeybee. Some novelty lollipops have more unusual items, such as mealworm larvae, embedded in the candy. The lesser mealworm beetle is a vector of many pathogens. It is known commonly as the lesser mealworm and the litter beetle. The adult lesser mealworm beetle is roughly 6 mm long and widely oval in shape. Xander and Cordelia lure the mealworm assassin underneath a door into a liquid glue trap. Humans then can eat the bug or its mealworm phase in cereal or flour. The droppings of mealworm were found to be safe for use as soil for crops. She identified the small chromosome currently known as the Y chromosome in the mealworm "Tenebrio". After an unexpected kiss, they rush to escape, running past the attacking mealworm assassin. She hears a knock at the door and lets in the mealworm assassin. No agents of biological pest control are used against the lesser mealworm. Sex determination was discovered in the mealworm by the American geneticist Nettie Stevens in 1903.