. Bulletin - United States National Museum. Science. 20 BULLETIN 108, UXITED STATES ISTATIONAL MUSEUM. costa; the first before middle of wing, median vein rmming closer to cubitus than to radial sector, about nine branches to cubitus; those beyond basal ones forked. Length to tip of wing, 18 to 20 mm. From Arizona; Sabino Canyon, Santa Catalina Mountains, January 7 (adults in colony with wing stubs) (Hofer coll.), and Coyote Moun- tains, August 4 to 7, and Baboquivari Mountains, August 7 to 9 (Lutz and Rehn), (flying). (Fig. 7.) I am not certain that these are the adults of Walker's K. occiden
. Bulletin - United States National Museum. Science. 20 BULLETIN 108, UXITED STATES ISTATIONAL MUSEUM. costa; the first before middle of wing, median vein rmming closer to cubitus than to radial sector, about nine branches to cubitus; those beyond basal ones forked. Length to tip of wing, 18 to 20 mm. From Arizona; Sabino Canyon, Santa Catalina Mountains, January 7 (adults in colony with wing stubs) (Hofer coll.), and Coyote Moun- tains, August 4 to 7, and Baboquivari Mountains, August 7 to 9 (Lutz and Rehn), (flying). (Fig. 7.) I am not certain that these are the adults of Walker's K. occidentis, which was based on a soldier; however they will agree in size, and we know of no other soldier for them; if not Walker's species they rep- resent a new species. KALOTERMES MARGINIPENNIS Latreille. Winged.—-Yellowish to castaneous; head pale behind; thorax pale in middle; venter and legs pale; the pronotum usually shows a large dark spot at pos- V, ) J--//*'^ terior corners. Head -^ much broader above than below. Eyes a little higher than long, less than diameter lower margin, two diameters the hind mar- ocelli touchmg eyes and inward from them; antennae 16- jointed, as long as width of head; third joint plainly a little longer than the second, and a little darker in color. Pronotum about twice as broad as long, broadest in middle, sides rounded, anterior margin almost straight across, hind margin faintly emarginate in middle. Wings twice as long as abdomen, pale, but the marginal veins very distinctly brown; the radial sector usually' with six branches to costa; median vein about halfway from radial sector to cubitus. (,fig. 1.) Head and pronotum with long erect hairs, and similar hairs in rows across dorsum of the abdomen. Length to tip of wings, 11 to 12 mm. Soldier.—Head yellowish, darker in front, almost brown; mandibles black, antennae pale, -third joint brown; pronotum pale yellowish, anterior edge darker; rest of body and legs very pale; tarsi yellow. Head o
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