108 
Psyche 
[Sept. 
IX-27-1941 Ross and Bohart (Calif. Acad. No. 6126) 
Allotype: ? eutopotypical (Calif. Acad.) 
Paratypes : 17<&?, 10?? eutopotypical. El Arco, L. 
Calif. IX-28-1941. 
Paratypes have been placed in the M.C.Z. collection 
(No. 28222), Chicago Nat. Hist. Mus., collections of F. 
H. Parker, Gr. P. Mackenzie and F. Werner. 
The localities are in the Vizcaino Desert in the south- 
ern part of the northern district of Lower California. 
(See Proc. Calif. Acad. Sci. (4th ser.) 24 : 8.) 
This species belongs to the caviceps group and looks 
most like diver sipuhescens Mayd. but differs in its 
narrower head, bulging occiput and thickened erect 
hairs on the pronotum. The male keys to couplet 37, 
aspera but differs in the broadly denuded flattened sur- 
face of the femora. The female keys to part 2 of couplet 
64 (with the addition of “or with a small scutellar spot”) 
and thence to rehni in couplet 75. It differs from 
rehni in lacking the ridges on the head and from uni- 
forma and alpina by the dense erect pubescence on the 
pronotal disc. 
Epicauta lauta subsp. rossi subsp. nov. 
Large series of Epicauta lauta from the United 
States show very little variation in color. One specimen 
from Lower California, the only representative of the 
species seen from there, shows a striking deviation from 
the usual uniform coloration. It has the pubescence the 
same as in lauta but the ground color is black, with the 
elytra tan. It looks more like the female of polingi than 
lauta but is structurally identical with the latter. 
Holotype: <?, 15 mi. S. of San Domingo, Lower Cali- 
fornia October 4, 1941. Ross and Bohart. (Calif. Acad. 
No. 6127). 
Epicauta virgulata (Lee.) 
Macrobasis virgulata LeConte, 1866, Smiths. Misc. Coll. 
6: no. 167, 2nd ed. : 156. 
Epicauta virgulata, Werner, 1945, Bull. M.C.Z. 45: 512 
(in part). 
