1863.] 
37 
thorax pitch black, collare and humeri aciculated, reddish in some specimens; 
the smooth, shining space on the pleurae is aciculated below, near the coxae ; 
the mesothorax is smooth and shining above; interval between the parapsidal 
grooves smooth; scutellum gibbose, black, densely sculptured, with two pits at 
base; abdomen pitch-brown, slightly tinged with red at base, second segment 
equal to half the length of the abdomen; the third somewhat shorter, the 
following very short; feet, including coxae, reddish, onychia blackish; wings 
hyaline, radial vein not reaching the anterior margin; both transverse veins 
and the two latter segments of the subcostal more or less infuscated; areolet 
distinct, of moderate size, slightly petiolate that is, separated by a short stout 
vein from the adjoining corner of the radial area; two almost obsolete narrow, 
diverging pale brownish streaks in the apical area; they are frequently al¬ 
together indistinct. 
Numerous % and 9 specimens. The coloring is more or less brown¬ 
ish or reddish, according to the degree of maturity of the specimens. 
Aulax sylvestris n. sp.—Pitch-black, antennae reddish, feet yellowish-red; 
space between the parapsidal furrows somewhat punctate anteriorly; areolet 
distinct; wings hyaline; length, %, 0.09—0.1; 9> 0.1—0.12. 
; antennae 14-joiuted; second and third segments of the abdomen not 
differing much in length; the others short. 
9 ; antennae 12-jointed the second segment of the abdomen occupies almost 
the whole of its surface. 
Head black, face aciculate, the scratches converging towards the mouth, 
front and vertex glossy and shining. Thorax black; prothorax opaque, finely 
pubescent, sculpture indistinct; dorsum of the mesothorax shining, although 
a strong magnifyiug power shows that it is minutely punctured; pleurae with a 
large, smooth and glossy square space, the lower side of which is somewhat 
aciculated; scutellum gibbose, deeply rugose-punctate, with the two usual basal 
pits; abdomen pitch brown, verging in chestnut brown or yellowish brown 
below; feet reddish yellow; wings hyaline; veins yellowish brown, not clouded, 
radial area open (that is, not limited by a vein along the costa). 
Many % and 9 specimens. 
As stated above, there is the most striking resemblance in sculpture 
and coloring between this species and the preceding. In order to com¬ 
plete their descriptions, I will add here a detailed comparison between 
them. 
In order to avoid a possible misunderstanding, I remind here, that in 
this paper, as in my preceding papers on Cynipidce I call second segment that 
which is apparently the first, thus following Dr. Rheinhard’s terminology. (See 
my paper: On the Cynipidm, etc.. Proceed. Entom Soe Phil. Vol. I, p. 48 in the 
note.) 
