The epigynum of this form was extremely undeveloped, having only a small epigastric furrow with depressions at either end.
Its size and markings are the same, and the epigynum is like that of longipes.
The epigynum has two small anterior openings directed forward instead of toward each other, as in æstivalis.
The finger of the epigynum is usually absent, as if broken off.
The epigynum is shown in the figure (fig. 188), and is quite constant in shape.
The latter is covered in females by an apparatus, sometimes large and complicated, called the epigynum.
The epigynum is dark at the sides, and the finger is short and flat at the end and turned a little outward.
The epigynum varies in appearance according to the thickness and color of different parts.
The opening of the air-tubes is halfway between the spinnerets and the epigynum.
The tracheal opening is not as far forward as in bimaculata, being nearer the spinnerets than the epigynum.