. Bulletin. Natural history; Natural history. Aug., 1975 Webb Et Al.: Mecoptera of Illinois 277 short, thick spines present along medial margin basal to this prominence, three to four short and thick medial spines occur near apices of lobes. Basistyles broad. Dististyles short, globular. Ae- deagus thickened basally, tapered api- cally to fine thread. Cerci narrow, elon- gate, extending well beyond apices of basistyles. B. texanus closely resembles B. stig- materus although B. texanus is much darker in color. The females are sepa- rated on the basis of wing color, which, as already noted, is n
. Bulletin. Natural history; Natural history. Aug., 1975 Webb Et Al.: Mecoptera of Illinois 277 short, thick spines present along medial margin basal to this prominence, three to four short and thick medial spines occur near apices of lobes. Basistyles broad. Dististyles short, globular. Ae- deagus thickened basally, tapered api- cally to fine thread. Cerci narrow, elon- gate, extending well beyond apices of basistyles. B. texanus closely resembles B. stig- materus although B. texanus is much darker in color. The females are sepa- rated on the basis of wing color, which, as already noted, is not always reliable. The males of these two species can be separated by the arrangement of spines on the medial margin of the ninth tergum. Little is known of the habitat of this species. In Texas individuals were collected with B. stigmaterus along streams under cover of willows and elms. B. texanus has been recorded from Texas, Florida, Kansas, and New Mex- ico (Fig. 49).. Fig. 49.—Distribution of Bittacus texanus in North America. BOREIDAE Stephens 1829 The Boreidae are winter insects, the adults emerging from November until May. Adults and scarabaeiform larvae live in, and feed on, moss. The small size of these insects (varying in length from to mm), the presence of rudimentary wings, and the distinct ovipositor in females readily define this family of Mecoptera. The family Boreidae has only one genus, Boreas, which occurs in Europe, Asia, and North America. Fifteen species are re- corded from North America, but only two species occur east of the Rocky Mountains. Boreus Latreille Boreus Latreille (1816:152). Type- species: Boreus hyemalis Linnaeus. Euboreus Lestage (1940:12). Synony- mized by Cooper (1972). Ateleptera Dalman (1823:34). Synony- mized by Esben-Petersen (1921). Small, stout insects. Coloration varies from reddish in B. elegans to olive green in some specimens of B. brevicaudus to brown and black in most species. Length mm. Head broad, ta- per
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