The abdomen of the female is very broad, and has four pairs of biramous appendages covered with hairs, the normal function of which is to carry the eggs.
"Hormones and Heredity"
J. T. Cunningham
The effect of the parasite in the male is that the abdomen is broader, the copulatory styles reduced, and biramous hairy appendages are developed similar to those of the female, but smaller.
"Hormones and Heredity"
J. T. Cunningham