527 
Descriptions of Neto Sphegidae. 
12. Tachysphex [gracilitarsis], n. sp.* 
[* In the original MS. a blank space is left for a 
specific name to be afterwards inserted. The name ofi’ered 
above is founded on the character by which the author 
distinguishes his species from panzeri, var. oo'ciniensis.'] 
$. T. panzeri var. oraniensi simillima. Tarsis posticis gracilio- 
ribus horuin articulo quarto vix usque ad medium exciso. 
5. Very closely allied to large specimen.s of T. panzeri var. 
oraniensis, and in colour, hairing and general appearance hard to 
separate from the latter. The following structural character will, 
however, easily distinguish it. The fourth joint of the posterior 
tarsi is divided in the middle not quite to its centre, and its longer 
apical spine (regarded laterally) does not extend to the apex of the 
fifth joint. (In panzeri the fourth joint is divided up far beyond the 
middle, almost to the base; and the longer apical spine, regarded 
laterally, extends quite to the apex of the fifth joint.) In fact the 
tarsi are altogether thinner and less strongly spined than they are in 
panzeri, and the claws are less developed. Another good character, 
though not quite so easy to appreciate, lies in the form of the dorsal 
area of the sixth segment. In this species it is distinctly shorter and 
wider than in panzeri, and more polished. 
Long, [about 13 mm.]. 
Biskra, F. D. M. 
[4 $ one of which must have been the “ type,” are in 
Coll. F. D. Morice.] 
1.3. Tachysphex [eduardi, n. sp.]. 
[In describing this species the author has again left a 
blank for the subsequent insertion of a specific name: 
and to fill this void the name eduardi is now suggested.] 
Panzeri et pygidiali affinis, sedalis anterioribus fuscis sat distinctus; 
alae posteriores multo dilutiores. Tarsi antici (d) spinis brevibus 
(5 ) spinis longis curvatis nigris armati. 
d. Allied to panzeri and pygidialis in the finely rugulose sides of 
the propodeum, but at once distinguished by the dark anterior wings. 
Head and thorax black ; face clothed with golden pubescence between 
the ocelli and the antennae, with silvery on the sides of the face below 
them and on the clypeus. Clypeus very convex longitudinally, its 
anterior portion shining, strongly punctured, rounded in front. 
Width of vertex between the eyes scarcely equal to the length of the 
first and second joints of the flagellum taken together. Mandibles 
