] 864 .] 
471 
occupies about i of the lateral or ^ of the dorsal surface; 3—5 subequal, 
6 and 7 somewhat shorter. Venter unusually large and apparently 5- 
jointed, the last joint very long. Last ventral joint (or “ ventral valve”) 
robust and horny 9 and presenting laterally the appearance of a highly 
polished, glabrous, tapering, acute spine times as long as its basal 
width, projecting horizontally and very slightly turned upwards at the 
extreme tip. Last dorsal joint 9 squarely truncate and bearing on its 
posterior surface a distinct “ caudal groove,” * without however any 
“ dorsal valve,”* in which groove the sheaths of the ovipositor, which 
are normal, are entirely hidden. On the side of dorsal joints 2—6 
there is a large, medial, impressed, shallow puncture, simulating a 
spiracle, and at the lateral base of 7 there is the spiracle usually seen in 
other Oynipidae but sometimes overlapped by joint G.f Between the 
“ventral valve” and the last dorsal 9 there is a large angular opening, 
which, as the dorsal joints open out above, becomes more contracted. 
Antennae 9 14-jointed, 1 and 2 short and subequal, 3 half as long again 
as 1 and 2 put together, 4—6 gradually shorter, 6—13 short, and 14 
a little longer than 13. Wings-. Differs from Ihalia in the 9 
antennge not being 13-jointed with the last joint no longer than the 
penultimate, in the scutel being unarmed, in the 1st dorsal joint of the 
abdomen being considerably larger than any of the following ones, and 
in the hind legs, especially the basal joint of the hind tarsi, not being 
abnormally long. From Rhodites it is separated by its much more 
compressed abdomen and the comparatively small size of the 2nd dor¬ 
sal joint, and also by the comparative shortness of the 3rd joint of the 
antennae, and by having no vestige of any “dorsal valve ” (see below) 
whereas Rhodites 9 has a very distinct one. 
Tribalia batatorum n. sp. 9 Black. Head witli the vertex opaque and gla¬ 
brous; front very finely rugose, almost aciculate transversely 5 antennae robust 
and § as long as the body. Thorax moderately polished, obsoletely rugose, the 
three usual mesonotal striae very distinct, except as they approach the collare, 
and widely and deeply impressed, the two outer ones converging but slightly 
behind; on each side of the tip of the central one a very short longitudinal 
stria not quite attaining the collare, and another rather longer one above the 
These terms will be explained below. 
f There is one small dorsal joint succeeding 7 in Cynipidae, as will be sliowui 
below, and therefore Cynipidae form no exception to the general rule, that the 
last abdominal joint is not spiraculiferous. 
