98 Psyche [June 
(a.) Abdomen red, yellow and black; tegule red; scutellum with two 
red spots; metathorax without spots; legs red and black. 
(a.) Larger (and with other differences) NV. vicinalis aldrichi 
(sal eres oe doe tetas cree eee ete eee Wetec NV. modocorum 
(b.) Abdomen black and yellow, with a little reddish; legs yellow, red 
and black; tegule yellow, at least in part; scutellum, post- 
scutellum and metathorax black............N. coquilletti 2 
(22.) NV. pascoensis Ckll. Pasco (Kincaid); Wawawai, May 15 (Mann). 
(23.) NN. jennei Ckll. N. Yakima (Jenne). Not a true Xanthidium; there 
is apparent affinity with Micronomada; see Canad. Entom., 1906, 
p. 282. 
Holonomada. 
(24.) NV. hesperia Ckll. Pullman, May 15 and 23, 1909 (Mann). One is 
much smaller than the other. 
(25.) N. edwardsii Cresson. Pullman, June 1 (Mann). 
(26.) N. vinnula Cresson. Spokane, May 20, Wawawai, May 15, and Pull- 
man, May 23 (Mann). 
(27.) N. mutans n. sp. Pullman (Mann). 
Micronomada. 
(28.) NV. semisuavis n. sp. Wawawai (Mann). 
Nomadula. 
(29.) N. articulata Smith. Pullman, May 28 (Mann). 
(30.) NV. erythrochroa Ckll. Pasco (Kincaid); N. Yakima, June (Jenne). 
