10 
Psyche 
[Mar. 
merlee, Arizona (Biedermann), and Colton, California 
(Pilate). 
Cerceris sexta Say 
Say, Bost. Jour. Nat. Hist., 1 : 382, 1837. 
Leconte Ed., 2: 763, 1859. 
This belongs to the group of frontata, but I have not 
seen it west of Wyoming and Utah. 
Cerceris sextoides sp. nov. 
Female. In general similar to sexta (biuugidata) and 
to eurymele, but the clypeal process is more widely 
emarginate than in either, and the horns of the process 
much more slender and sharply pointed, and not at all 
angulate at the base of the emargination. The markings 
are similar to those species, the abdomen with a broad 
band on each segment, emarginate in the middle of the 
front; the venter is black on the first and basal half of the 
second segment. Front and mid femora partly black (not 
in sexta) and the hind femora partly dark above. The 
hair and sculpture are about as in eurymele. 
The male is more slender than in eurymele , the second 
and following segments hardly more than two-thirds as 
broad as in eurymele, and the yellow bands are more nar- 
row ; the venter has yellow bands or lateral spots, the hair 
lobes not as broad as the clypeal truncation. The femora 
of all legs have some black, the hind femora with a large 
black spot at tip. 
Length of '? 12 mm., of <$ 11 to 12 mm. 
Holotype ? from Lone Tree, Yakima River, Wash., 30 
June 1882 (S. Henshaw) ; allotype and paratvpes from 
Nelson’s, Yakima River, 4-5 July, and Camp Umatilla, 26 
June, both Washington and by Mr. Henshaw; also from 
Davis, Calif., 1 July (Bohart), and one “California.” 
Type M.C.Z. no. 23547. 
Cerceris grandis Bks. 
Banks, Bull. Amer. Mus. Nat. Hist., XXXII : 423, 1913. 
Type from Ft. Yuma, Arizona. 
