. Bulletin. Natural history; Natural history. 306 Illinois Natural History Survey Bulletin Vol. 31, Art. 7 wings and in the size and number of clear spots in the apical band. In 50 percent of the specimens examined, the second marginal spot was absent. Legs reddish brown. Abdomen dark yellowish brown to reddish brown. Male terminalia dark yellowish brown. Ninth tergum elon- gate, base broad, apex emarginate, forming two slender lateral lobes. Hy- povalves (Fig. 124) elongate, moder- ately broad, ending well before bases of dististyles. Basistyles broad, with projection along mesal margin. Dist
. Bulletin. Natural history; Natural history. 306 Illinois Natural History Survey Bulletin Vol. 31, Art. 7 wings and in the size and number of clear spots in the apical band. In 50 percent of the specimens examined, the second marginal spot was absent. Legs reddish brown. Abdomen dark yellowish brown to reddish brown. Male terminalia dark yellowish brown. Ninth tergum elon- gate, base broad, apex emarginate, forming two slender lateral lobes. Hy- povalves (Fig. 124) elongate, moder- ately broad, ending well before bases of dististyles. Basistyles broad, with projection along mesal margin. Disti- styles shorter than basistyles. Ventral parameres (Fig. 125) elongate, barbed, unbranched, extending to bases of dis- tistyles. Female genital plate (Fig. 156) short, mm in length. Distal plate oval, apex emarginate, forming two broad lateral lobes. Basal plate absent. Spermathecal apodeme elongate, ex- tending well beyond base of distal plate although not reaching apical emar- gination. Superficially the male terminalia of P. dubitans resemble those of P. speci- osa, especially in the shapes of the ven- tral parameres and hypovalves. The males of P. dubitans are distinguished from those of P. speciosa in having nar- rower hypovalves, longer basistyles, and fewer and broader barbs, tending to occur in tufts, on the ventral para- meres. In northern Illinois P. dubitans was collected on stinging wood nettle along. Fig. 182.—Distribution of Panorpa dubitans in North America. the bottomlands of Sugar Creek in the Macktown Forest Preserve, Winnebago County. P. dubitans is a north-central species, occurring in Illinois, Indiana, and Wis- consin (Fig. 182). Illinois Records. — Collected abun- dantly from mid-May to early Septem- ber in northern Illinois. Cook County; Thornton, 22-VI-1949, Ross and Stan- nard, 1 S ; Thornton, Glenwood Forest Preserve, 3-VI-1970, L. J. Stannard, 1 S . Lake County: Waukegan, 7-VII-1932, T. H. Frison, 1 $ . Winnebago County: Macktown Forest Pr
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