126 
COLOMBIAX DERMAPTER.\ AX'D ORTHOPTERA 
weakly aciite-anjjulate produced in increasing ratio caudad. Sixth t-ergite 
with a small but very ileep and sharply defined depression mesad, formed by 
two very deeply concave areas, this dei)ression transverse, twice as broad as 
long. Seventh tergite almost completely concealed. Eighth tergite with 
latero-caudal angles weakly aeute-angulate produced from points on its free 
margin eephalad of the cerci, the caudal margin transverse between these. 
Su])ra-anal plate short, its length one-half its total basal width, camlal mar- 
gin broadly convex between the cereal bases. Paired jdates beneath the 
supra-anal i)late si)ecialized; sinistra! plate with a chitinous arm directed 
ventrad, its apex {)ro<luced in two sharp aciculate points, directed dextrad; 
dextral plate very large, extemling to base of ])roduction of sinistral plate, its 
dorsal and ventral margins parallel, its disto-ventral angle produced sinistrad 
in a sharp point, with di.stal margin there concave. Subgenital pltae with 
sinistral margin weakly convex to a small, simjrle, unarmed, sinistral style, 
thence weakly oblique to point of greatest production, dextrad. there the 
surface of the jdate is curled upward and i)rotluced sinistrad (the dextral 
style), this production tapering to its rounded ajiex and supjdied with hairs 
(as is the subgenital jilate and the distal margins of the supra-anal plate), 
the dextral margin thence obliquely ascending, straight, to the base of the 
plate. 
Limbs as characteristic of the genus. 
Allotype . — 9 ; same data as type. [Hebard Collection.] 
Agrees with male except in the following features. Form very slighth^ 
broader, the interocular space very slightly broader. Tegmina and wings 
decidedly less elongate. Dorsal surface of abdomen unspecialized, with 
latero-caudal angles of fourth to seventh tergites weakly acute-angulate 
produced in increasing ratio caudad, eighth tergite almost completely con- 
cealed. Supra-anal jdate moderately elongate, its length one-half its width 
between the cereal bases, caudal margin triangulato-convex with apex broadly 
rounded. Subgenital plate short, convex, with free margin very broaflly 
convex to median portion, where the ))late is narrowly curled ui)ward, with 
margin very broadly convex. 
Head ochraceous-buff ; the vertex ochraceous-tawny, becoming deep chest- 
nut brown to immediately below the light ochraceous-buff ocelli; a fleck of 
deep chestnut brown ventro-me.sad of the base of each antennal .socket, 
connected by a narrow transverse suffused band of cinnamon brown, which 
shows a ventrad arcuation. Pronotum buckthorn brown, disk heavily washed 
with ru.sset, this stronge.st as a large vague i^atch on each side, the interven- 
ing area caudad paler in the female, ochraceous-tawny. Tegmina trans- 
lucent dresden brown, the marginal field slightly jialer. Dorsal surface of 
male abdomen mummy brown, with a very narrow, ])aler lateral margin, the 
sixth tergite and supra-anal i)late o(^hraceous-buff with a suffusion of prout’s 
brown. Dorsal surface of female abdomen buckthorn brown, with a very 
narrow huffy lateral margin, the tergites toward their caudal margins and 
supra-anal plate at cereal bases suffu.sed with mummy brown. Cerci mummv 
