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. (PI. 2, 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 one and two- thirds to fully twice as long as broad; sides par- 

 allel, or even faintly concave in long headed forms; ocelli hyaline 



Fig. 9. 



-Distribution of Kalotermes marginipennis. 



