NEW SPECIES OF THYNNIDÆ. 
123 
broadly subtruncale at the apex; postscutellum with a very obscure 
tubercle on the middle, scarcely projecting beyond the median segment 
which is almost vertically truncated. Abdomen elongate conical; the 
basal segment vertically truncate anteriorly ; the sixth ventral segment 
with an acute spine on each side at the apical angles ; the seventh 
dorsal segment produced into a flat, longitudinally striated plate, broadly 
rounded at the apex and not emarginate. Hypopygium longer than the 
breadth at the base, with two spines on each side, the basal spines 
the longest, and an acute slightly recurved apical spine, the dorsal 
surface obliquely striated. 
Black ; the abdomen with very faint bronze green reflections ; 
mandibles (except at the apex), clypeus, the interantennal prominence 
(except the dividing sulcus), the margins of the eyes interrupted at the 
summit, the margins of the pronotum narrowly, interrupted in the 
middle on the anterior margin, the tegulae, a spot on the mesopleuræ 
below the anterior wings and another above the base of the inter¬ 
mediate coxæ, two longitudinal lines on the mesonotum on the inner 
side of the inner sulcus touching the posterior margin but not exten¬ 
ding to the middle, a transverse band near the apex of the scutellum, 
the postscutellum, a broad T-shaped mark on the truncation of the 
median segment, a narrow transverse band narrowly interrupted in the 
middle on the first dorsal abdominal segment, a small transverse spot 
on segments 2—4 and another near the apical angles of the same 
segments, a small spot on each side of ventral segments 2—4, a narrow 
transverse band on the prosternum, the greater part of the anterior 
coxæ beneath, a line on the posterior coxæ above and a large trian¬ 
gular spot above them yellow; femora, tibiae and tarsi ferruginous. 
Wings hyaline, tinted with yellow, stigma ferruginous, nervures fusco - 
ferruginous. 
Length 17 mm. 
5 . Clypeus short, transverse, without a carina, the mandibles 
falcate. Eyes oval not touching the base of the mandibles. Head rather 
flat, scarcely as broad as the pronotum, more than half as broad again 
as long, shining, the vertex almost smooth, the front with a deep 
concave depression on each side smooth and shining; a broad raised 
space between the depressions sparsely punctured and thinly clothed 
with long hairs, marked with a longitudinal carina and the sides 
slightly raised forming lateral carinæ ; the posterior margin of the head 
widely emarginate. Thorax very coarsely punctured, the punctures very 
large and sometimes confluent, the pronotum twice as broad as long, 
widely emarginate anteriorly and one third broader than posteriorly; 
