||.5- .62 mm|
The lines bordering the wing area are conspicuously refractive. The duplex rounded lips bear two circlets of papillae, the anterior being exceedingly minute and difficult to see. The amphids are one-twelfth as wide as the head. The blunt labial probolae are thin and plate-like and about one-sixth as high as the width of the lip region. The fourth set of pharyngeal plates are small like those of butschii, and the third and fifth sets are undeveloped. The median swelling of the esophagus is a prominent feature, being three-fifths as wide as the neck at the base of the pharynx and continuing with this same proportion to where it is constricted to pass through the nerve ring. The cardiac bulb is almost spherical and two-thirds as wide as the neck. The intestine is at once three-fourths as wide as the body, its cells containing only a few, almost colorless granules. The lips of the large vulva are symmetrical and protuberant. The rectum is somewhat sigmoid and ends in a conspicuous anus having a large posterior lip. The phasmids are situated almost opposite the anus. The last annule of the tail forms a distinctly set off terminus. Male unknown.
Found at Salt Lake City, Utah, in sphagnum moss packing, the source of which was traced to City Point, Wisconsin.
(Description- Thorne, 1925)