. Brigham Young University science bulletin. Biology -- Periodicals. MlBIDAE OF THE NEVADA TEST SlTE of closely cropped pasture land; the bugs were running about where the little brown ants, Lasius niger alienus var americanus Emory, were very abundant. At Fort Snelling, Minne- sota, in an area of little disturbed, high prairie vegetation, particularly among the shorter grasses, I found and collected a large series of CoquiUcttia amoena (Uhler) from an area which abounded with the ant, Formica (Neo- formica) pallide-fulva var. incerta Emory. The wingless females so resemble this ant in form an
. Brigham Young University science bulletin. Biology -- Periodicals. MlBIDAE OF THE NEVADA TEST SlTE of closely cropped pasture land; the bugs were running about where the little brown ants, Lasius niger alienus var americanus Emory, were very abundant. At Fort Snelling, Minne- sota, in an area of little disturbed, high prairie vegetation, particularly among the shorter grasses, I found and collected a large series of CoquiUcttia amoena (Uhler) from an area which abounded with the ant, Formica (Neo- formica) pallide-fulva var. incerta Emory. The wingless females so resemble this ant in form and color that one must look rather closely or with a lens to separate them. Miridae of the above species of Sericoplumes and CoquiUcttia are extremely agile and very rapid of move- ment, especially when they happen to meet face to face with ants. While they seem not to fear the ants, they appear to avoid close contact with them. SYSTEMATIC CHARACTERS The most important character for separa- tion of subfamilies is found in the structure of the arolia, situated between and at the base of the claws (Fig. 14). In the subfamilies Phylinae and Deraeocorinae the arolia are represented by a pair of erect bristles that are difficult to see in the smaller species. The arolia are erect and well developed in the Orthotylinae and Mirinae—they converge at the tips in Ortho- tylinae, and diverge apically in the Mirinae. Pseudarolia are clear to white in color and occui on the inner curvature of the claw near the base. The pseudarolia are found in the Phylinae, but are larger and more prominent in the Di- cyphinae and Bryocorinae. The form of the male genital segment is rather distinctive in the subfamily Phylinae. The genital claspers are relatively small, with the tip of the right clasper resting in a notch across the middle of the V-shaped" left clasper; both oedagus and claspers arc twisted somewhat to the left side. I believe that this particulai form of genital segment is a fundame
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