Acrobeloides butschlii
(de Man, 1885) Steiner & Buhrer, 1933
Syn.:  Cephalobus persegnis Butschli, 1973
Cephalobus butschlii de Man, 1884
Acrobeles (Acrobeloides) butschlii (de Man, 1884) Thorne, 1925
nec Acrobeloides buetschlii of Steiner & Buhrer, 1933
Cephalobus (Acrobeles) buetschlii de Man, 1884 (de Man, 1921)
Photo Gallery- Konza Prairie

Female: L = 0.30 mm; a = 16.1; b = 3.2; c = 15.2; V = 62.6%
The wings are often inconspicuous.  The slightly expanded lip region bears three flatly-connate labial probolae.  Two specimens have been observed in which the probolae ended in fine bristle-like points.  The- and fifth sets of pharyngeal plates are undeveloped and the fourth set very small.  The median bulb of the esophagus is well developed.  The lips of the vulva are symmetrical and protuberant.  The eggs are usually about one-ninth as long as the body.  The - from Utah specimens corresponds very closely with the measurements of European specimens given by Butschli and de Man.  Males have never been found by the writer among the several thousand specimens seen.
    Very common in the cysts of Heterodera schachtii Schmidt and frequently found living free in the soil, usually in cultivated fields.  California, Colorado, Idaho and Utah.
(Description- Steiner & Buhrer, 1933)