MEMOIRS OF THE QUEENSLAND MUSEUM. 
9 
WASPS OF THE GENUS CERCERIS IN THE 
QUEENSLAND MUSEUM. 
By T. D. A. Cockerell. 
Cerceris hackeriana n. sp. 
Female (type). Length about 13 to 15 mm. ; black, marked with red 
and yellow ; head and thorax above with short ochreous pubescence ; head 
massive, face very broad, orbits diverging below; sides of face above mandibles 
with appressed ochreous hair ; clypeus black, finely punctured, the lower margin 
with four obtuse dentiform lobes, the upper part with a large outstanding 
lamina, its basal part broad and yellow, its apical part narrower, dark reddish, 
and bifid, ending in a pair of shining nodules ; mandibles robust, strongly 
curved, dark red, with a yellow spot at base, the apical portion black, with a 
red spot at tip ; antenna? entirely ferruginous ; front and vertex dull and 
densely punctured, but a shining space at each side of ocelli : yellow lateral 
face- marks broad but short, ending obliquely at about level of antennse ; an 
elongate yellow spot behind the top of each eye ; thorax very coarsely 
punctured, but area of metathorax convex, polished and smooth, weakly obliquely 
striate at sides ; light marks of thorax consisting of a pair of cuneiform yellow 
marks on prothorax above ; tubercles dull red, scutellum with a broad red band, 
obtusely excavated in middle behind, and postscutelluin with an interrupted 
yellow band on red ground ; tegulae clear, ferruginous ; wings strongly brownish, 
darker along upper margin ; coxa? black, marked with cream-colour apically ; 
legs otherwise ferruginous, the femora marked with black behind, the mark on 
the anterior ones confined to the base ; abdomen strongly punctured, petiole 
broader than long, red at base, apex and sides, and with a small yellow spot 
on each side ; second tergite black, with an entire apical yellow band ; third 
with apical margin dull red, fourth with an apical yellow band margined with 
reddish, fifth with the basal two-fifths black, and the rest dull red; apex red, 
the pygidial plate broad, but narrowing apically. 
Male. Length about 11*5 mm. ; more slender; disc of clypeus occupied 
by a large subquadrate lemon-yellow area, and the bidentate lamina wholly 
absent ; face narrowed, lateral marks much narrower, spots behind eyes small 
and pyriform ; scutellum entirely black ; black on femora more extensive, on 
anterior ones not confined to base ; abdomen with yellow bands on second and 
fifth tergites, third all black, fourth with red hind margin, fifth and apex red. 
The petiole is longer than broad. 
Two females, one male : Tooloom, N.S.W., Jan. 1926 (//. Hacker). Nearest 
to C. opposita Smith, but easily known by the clypeal lamina of the female, 
and other characters. C. opposita is a considerably smaller insect. 
