328 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H SER. 
including the tegmina, and dark sides give the female a par- 
ticularly striking appearance. 
This race appears to be best characterized by the vertex, 
which averages slightly sharper than in the other races and by 
the tegmina which slightly overlap in both sexes and have their 
apices rather sharply rounded. 
18. Halmenus robustus choristopterus Snodgrass 
1902. Halmenus choristopterus Snodgrass, Proc. Wash. 
Acad. Sci., IV, p.450. [ 2 ; Charles Island, Galapagos Islands. ] 
Charles Island, May 30 to June 4, 1906, 1°. 
This race is now known from two females. It is apparently 
very close to H. robustus cuspidatus Snodgrass. The female 
before us, however, has the apical portions of the ovipositor 
valves strongly curved, much more so than in any of the other 
females of Halmenus at hand, in which these portions are only 
weakly curved. 
The present specimen, though dried alcoholic, was in life 
clearly very pale in coloration, with tegmina showing a narrow 
whitish border along their ventral margins and caudal femora 
having dark areas dorsad in place of bands. The pronotum has 
a medio-longitudinal carina, weak but distinct, which feature is 
shown to a like degree in but one female of 7. cuspidatus. 
The lateral angulation of the pronotal disk is distinct though 
not decided, the caudal margin of the pronotum weakly and 
bluntly angulate, the tegmina elongate, separated by a brief 
interval (1. mm.), with apices broadly rounded. In these latter 
features complete agreement with specimens of 7. cuspidatus is 
found. 
19. Halmenus robustus cuspidatus Snodgrass 
1902. Halmenus cuspidatus Snodgrass, Proc. Wash. Acad. 
Sci., IV, p. 450. [¢, 2 ; Iguana Cove and Tagus Cove, Albe- 
marle Island, Galapagos Islands. ] 
Tagus Cove, Albemarle Island, 3000 feet, 13,12, in coitu; 
Cowley Mountain, Albemarle Island, August 9 to 13, 1906, 3 é, 
52,1 juv. 2; Villamil, Albemarle Island, 1200 feet, August 
20 to September 5, 1906,52,42. 
