1949] 
Werner — Epicauta diver sicornis 
75 
United States to Guiana and Colombia. The diversi- 
cornis group is interesting in that it contains the only 
species known to occur in South America. 
A key to the males of the known species follows.. Ex- 
cept where noted, all specimens on which ranges are 
based have been examined by the author. 
1. First antennal segment triangular in cross-section, 
with three almost flat surfaces 2 
First antennal segment flattened or oval in cross- 
section, with at most two flat surfaces 4 
2. First tarsal segment slightly longer than second, with 
uniform sparse pubescence. Antennae as in figure 
2. Brown, clothed with cinereous pubescence, which 
is denser in a line down each elytron. Mexico : 
Nayarit (Tepic), Morelos (Cuernavaca), Yucatan 
(Chichen Itza) E. forticornis (Haag), 1880 
First tarsal segment shorter than second, denuded, 
shiny 3 
3. First two antennal segments equal to rest in length. 
Black, the elytra luteous, uniformly clothed with 
cinereous to luteous pubescence. U.S.: Texas (Val 
Verde Co. to El Paso Co.), New Mexico (southern), 
Arizona (Douglas, Sta. Catalina Mts.). Mexico : 
Nuevo Leon (Monterrey) E. polingi Werner, 1943 
First two antennal segments longer than the rest. 
Brown, with the margins of the elytra paler and with 
paler pubescence. U.S. : Arizona (Maricopa Co. to 
Gila Co.). Mexico : Sonora (Imuris). 
E. liebecki Werner, 1943 
First two antennal segments shorter than the rest. 
Brown to luteous, with uniform cinereous pubescence. 
U.S.: Arizona (Maricopa Co. to Cochise Co.). 
Mexico : Sonora (Arizpe) 
E. arizonica Werner, 1943 
4. Second antennal segment distinctly more than half 
as long as first. Fig. 1 and fig. 3 5 
Second antennal segment half as long as first or 
shorter. Fig. 4 to fig. 8 6 
5. First segment of anterior tarsi longer than second, 
not expanded and with at least scattered pubescence. 
