852 
Dr. J. L. cock’s Third Paper on the 
the posterior margin above minutely crenulate barely undate ; the 
posterior process lengthily extended backward beyond the hind 
femora, a distance nearly equal to their length, the lateral margins 
below convex, anterior process in front curvate, apex bidentate, sub- 
obtuse, the inferior margin strongly ol)lique, substraight; lateral 
lobes posteriorly bisinuate. Elytra oblong ; wings fully explicate, 
freely exposed at the sides and ends, and more or less distinctly ex¬ 
tended beyond the pronotal apex, and beyond the hind femora a 
distance equal to their length. Femora subscabrous granulate, an¬ 
terior femora foliaceous-dilate, superior carina serrulate, terminating 
in a small denticle, ventral margin .serrulate-sublobulate ; middle 
femora above serrulate-sublobate, inferior carina ampliate backwards 
toward the apex, serrate and incised bilobate ; posterior femora 
externally scabrous, superior carina compresso-ampliate and serrate 
backwards terminating acutely, superior surface before the knees 
bearing two distinct fuscous spines, the inner one erect; external 
femoral carina thin, inconspicuous and minutely serrulate, the in¬ 
ferior external armed with two obscure minute denticles ; ventral 
carina crenulate and somewhat distinctly quinquelobate. Colour 
greyish or greyish rufescent, the crest sometimes cinerous, subhya¬ 
line, and rarely marked with fuscous along the margin. 
Length of pronotum, 14 mm. ; posterior femora, 5.3 mm. 
9 pronotum, 15.5 mm. ; posterior femora, 6 mm. 
Seven examples; three males and four females from 
N.E. Rhodesia in the Oxford University Museum, col¬ 
lected by S. A. Neave in the following localities:—Two 
from Lofu River, 3500 ft., No. 2129, August 13, 1908 ; 
one from Chisinga Plateau, Kalangwini district, 4500 ft., 
September 25, 1908; three from Upper Kalangwisi 
Valley, 4200 ft.. No. 2125, September 3, 1908, and one 
from Alala Plateau, Ndola district, 4000 ft., October 12, 
1905. 
This species may be a dimorphic long-wing form of 
X. neavei. 
X. crisiifrons, sp. nov. 
Frontal scutellum cristate produced, the margins between the an¬ 
tennae subentire or barely minutely serrulate, above slightly denticu¬ 
late, median carina of vertex slightly crenulate, and bearing a dis¬ 
tinct denticle projecting between the middle of the eyes. Pronotum 
strongly and thinly compressed foliaceous, bearing radiating veins ; 
superior margin subreniforin, forward before the middle flattened 
