collected near Aden by Col. J. W. Yerbury. 419 
A detailed description of this species may be of value, 
as the species of Syritta are so very closely allied and so 
insufficiently distinguished. 
Fie, 2. Syritta latitarsata, right hind leg, from behind. 
S. latitarsata. About the size of S. pipiens, but the abdomen is 
narrower and longer. Face, frons, and all the vertex except about 
the ocelli glossed with silvery white tomentum ; face and frons with- 
out pubescence except for a few white hairs down the sides of the 
face ; the sides of the mouth and the very small jowls are yellowish ; 
the back of the head is narrow and is whitish, and bare until the 
top where there is a pale fringe behind the eyes and vertex ; vertex 
shining black about the ocellar triangle but otherwise glossed with 
silvery white; it is all bare except for whitish pubescence on the 
elongated front part. Eyes touching for about six facets and con- 
sequently the vertex is about three times as long as the frons ; the 
facets on this front part where the eyes touch are considerably dilated. 
Antenne entirely pale orange, without any hairs or bristles on the 
basal joints ; the third joint is nearly twice as long as deep ; arista 
placed at about a third from the base, brownish-yellow, and about 
as long as the antenne, 
Thorax dull blackish, densely punctate, with whitish reflections ; 
humeri whitish with a faint yellow tinge ; a large space behind the 
humeri, spreading almost across the suture and over all the pleure 
whitish and also a pair of tolerably broad short lines on the front 
part of the disc of the thorax ; the dise of the thorax is practically 
bare, as the pubescence, which consists of minute appressed whitish 
hairs, is hardly visible, but the upper part of the pleuree and the 
adjoining parts of the thorax bear a slight whitish pubescence. 
Sentellum black, densely punctate, disc flattened and slightly 
marginate at the tip, practically bare as the bristles are so short. 
