Vor, II, Pt. Il] HEBARD—DERMAPTERA AND ORTHOPTERA 329 
This race is decidedly variable. The angle of the vertex is 
more acute in some individuals than in others. The pronotum 
has the medio-longitudinal carina usually very weak, particu- 
larly in the prozonal and mesozonal portion, which portion is 
then somewhat swollen, in other individuals it is subobsolete 
and in one example it is moderately strong. The dorsum of the 
pronotum rounds into the lateral lobes with scant trace of angu- 
lation in some, in others angulation is marked, particularly in 
the median section. The caudal margin of the pronotum usually 
shows a blunt angulation, but it is evenly convex in a few ex- 
amples. The tegmina vary much in length (4 3.9-5.2; 9 
4.7-6.7 mm.), have the apices ranging from broadly rounded 
to acute and are overlapping (in three males only), or sepa- 
rated by a brief interval in both sexes ( ¢ attingent to.3; 2 .5 
to 1. mm.) 
The color-pattern is weakly to strongly developed in the 
series, and two striking features, a very pale line on the costal 
margins of the tegmina and transverse caudal femoral bands, 
are present or absent in different individuals. In the present 
series the pale line on the costal margins of the tegmina is very 
conspicuous in five males and one female, conspicuous in three 
males and two females, weak in one male and two females, and 
absent in five females. The majority have the caudal femora 
immaculate, but variation is shown in all degrees up to one 
female in which the three dark bars are very heavy. 
20. Halmenus eschatus,'? new species 
(Plate 18, figures 10 and 11) 
1902. Halmenus sp. Snodgrass, Proc. Wash. Acad. Sci., IV, 
p. 451. [From stomach of a mockingbird on Wenman Island, 
Galapagos Islands.] . 
The present insect is clearly a derivative from the same stock 
as H. robustus Scudder, the differentiation having reached a 
much greater degree than in the races of that species here 
treated, and, in our opinion, warranting its recognition as a full 
species. 
/ 5 4 C = 
10 From €0 X @Tos=the most remote, in allusion to the fact that this species occurs 
only on Wenman Island, the most isolated of the Galapagos Archipelago. 
