Australian Diplopterous Hymenoptera. 399 
tuberculate at the base. The apical sternites from the third 
are dull ferruginous brown. 
Hab. Townsville, Queensland (Dodd). 
Extremely like aterrimus, but differs in the broader and 
emarginate clypeus, in the yellow base of the clypeus, in 
the colour of the apical sternites, and in the more strongly 
raised and tuberculate base of the second sternite. Both 
species are very different in colour from other species of 
the genus, superficially resembling Odynerus dietrichianus, 
Sauss., and other similarly coloured Odynerus. In both 
species the clypeus is feebly convex, somewhat more strongly 
in aterrimus than in diabolicus. The two species appear to 
be closely allied, much more so than is usually the case in 
species with the same colour-pattern found in the same 
locality. 
Paralastor submersus, sp. n. 
9. Nigra; macula parva interantennali, tergitoque secunda macula 
maxima utrinque in medio confluentibus, flavis; alis infuscatis, 
venis nigris. 
Long. 11 mm. 
?. Clypeus strongly and rather sparsely punctured, flat, 
widely and rather shallowly emarginate at the apex, the 
apical margin distinctly raised. Head coarsely and closely 
punctured, thorax punctured-rugose, tegule sparsely punc- 
tured at the base, more closely towards the apex. Median 
segment punctured-rugose ; first tergite strongly punctured, 
the punctures becoming sparse and smaller towards the 
apex ; second tergite much more finely and sparsely punc- 
tured, the punctures becoming much closer and rather.larger 
at the apex. Second sternite strongly punctured, raised and 
subtuberculate at the base. . 
Hab. Lolworth Station, N. Queensland; June 29, 1901. 
Received from Mr. Froggatt. 1 ?. 
Superficially this somewhat resembles P. conspiciendus, 
Perkins, but the form of the clypeus shows that it is really 
allied to the group of P. mackayensis, Perkins, and P. cari- 
natus,Sm. The vessel on which the box containing the 
specimen was sent was torpedoed, and the box was sub- 
merged, but after treatment the specimen was dried in a 
fairly satisfactory manner. 
In all species described here the length measurement is to 
the apex of the second abdominal segment. The types are 
in the British Museum. 
