Sept. 1897] MacGillivray : New Species OF Tenthkedo. 107 



base of the mandibles, a spot on the pronotum, deeply angulate beneath, the 

 mesothorax and the metathorax except the scutellum, a spot on the pleura, 

 the pectus, a spot above the posterior coxse, the basal one-half of the basal 

 plates, a line on the base of the first abdominal segment, and a spot on the 

 apex of the femora; with the following parts rufous : the apical segments of 

 the abdomen, the apex of the posterior tibia: and the posterior tarsi ; the cly- 

 peus squarely emarginate ; the third segment of the antenna twice the 

 length of the fourth ; the wings yellowish hyaline ; the veins blackish ; the 

 the costa and the base of the stigma luteous ; the apex of the stigma brown- 

 ish. Length, II mm. Habitat— Olympia, Washington (Trevor Kincaid.) 



magnatus, sp. nov. 

 17. Posterior tibiae black. ^.— Black, with the following parts yellowish white : 

 the clypeus, the labrum, the mandibles except at apex, the cheeks, an inter- 

 rupted line on the pleura, a line on the collar, a spot on the tegula, a spot 

 above the posterior coxze, the sides of the basal plates, a spot on the pectus, 

 the coxa, the trochanters, the femora except a black line above, the front and 

 middle tibia beneath, the venter, and a narrow margin on the apex of the 

 second and third abdominal segments; the clypeus narrowly and squarely 

 emarginate; the third segment of the antenna one-third longer than the 

 fourth; the wings hyaline, the apical third smoky; the veins, including the 

 costa and the stigma, black. Length, 13 mm. Habitat.— Olympia, Wash- 

 ington (Trevor Kincaid) nigritibiales, sp. nov. 



Posterior tibia in part pale above jg 



18. Four anterior tibia entirely pale lo 



Four anterior tibia with a black line above. ^. — Black, with the following 

 parts yellowish-white: the clypeus, the labrum, the mandibles except 

 at apex, the cheeks for two-thirds the length of the eye, the palpi, the 

 tegula, a broad mark on the collar, an oblique spot on the pleura, a 

 spot on the pectus, a spot above the posterior coxa, the sides of the 

 basal plates, the coxa and the trochanters except a black line above, the 

 front and middle femora, the tibia and the tarsi except a black line above, 

 and the posterior femora (becoming rufous towards the apex) except a black 

 line above ; the following parts rufous : the posterior femora and tibia and 

 the abdomen beyond the basal plates ; the clypeus squarely emarginate ; the 

 third segment of the antenna twice the length of the fourth ; the wings hy- 

 aline; the veins black; the costa and the stigma luteous, darker at their junc- 

 ture. Length, 10.5 mm. Habitat— Olympia, Washington (Trevor Kincaid). 

 This species has been sent to some correspondents under the name rubel- 



^'^'^^^ messica, sp. nov. 



19. Collar pale 20 



Collar black. ^.— Black, with the following parts yellow: the clypeus, the 

 labrum, the mandibles except at tip, the cheeks, the tegula, a spot on the 

 posterior part of the mesopleura, a spot above the posterior coxa, a vertical 

 line beneath the posterior wings, the sides of the basal plates, the basal mem- 

 brane, and the coxa, trochanters, and front tibia except a black line above ; 

 the following parts rufous: the abdomen, including the venter beyond the 

 basal plates, the middle and posterior femora except a black line above, the 



