112 
ROWLAND E. TURNER 
beyond the dorsal segment, truncate at the apex and unarmed. Second 
cubital cell as long as the third on the radial nervure, receiving the 
first recurrent nervure just beyond the middle, second recurrent nervure 
received at one quarter from the base of the third cubital cell. 
Black ; the inner margin of the eyes narrowly as high as the 
base of the antennæ, the margins of the pronotum very narrowly, a 
spot on the postscutellum and a spot on each side of abdominal seg¬ 
ments 2—4 pale yellow; the mandibles, apex of the clypeus, two small 
spots between the antennæ, a darker spot on each side on the poste¬ 
rior margin of the head, the tegulæ the second, third and seventh dor¬ 
sal segments of the abdomen, all the ventral segments and the legs 
except the coxæ ferruginous. 
Length 5 mm. 
Hab. Sydney, N. S. W. (Biró.) 
Nearest to rubromaculatus Turn. The group does not approach 
very closely to typical Aeolothynnus . Another specimen in the collec¬ 
tion, apparently a colour variety of the same species, from Mount 
Victoria, N. S. W. has the fourth dorsal segment of the abdomen fer¬ 
ruginous, and the margin of the clypeus and a narrow longitudinal 
line on the scutellum pale yellow. 
Thynnus (Aeolothynnus) lactarius sp. nov. 
cT. Clypens narrowly produced and truncate at the apex, finely and 
closely punctured, the apical margin smooth and shining, moderately con¬ 
vex, a carina from the base not reaching the apex. Antennæ as long as 
the thorax and median segment combined, not thickened, of nearly 
equal thickness thronghout, the apical joints very feebly arcuate beneath; 
the interantennal prominence very feebly bilobed at the apex. Head 
finely and closely punctured, with a short and almost obsolete frontal 
sulcus ; broader than the thorax. Pronotum shining, sparsely and 
minutely punctured, narrowed anteriorly, the anterior margin slightly 
raised. Mesonotum and scutellum finely and closely punctured; the 
median segment very finely punctured rugulose, shining and almost 
smooth at the extreme base. Abdomen shining, very minutely and 
sparsely punctured, fusiform and flattened, the first segment narrow at 
the base, longer than the second, which is transversely depressed at 
the base. Hypopygium narrow, projectieg beyond the dorsal segment, 
the sides almost parallel, narrowly truncate at the apex, with a conical 
apical spine. 
Black ; the mandibles, the margins of the pronotum narrowly, the 
