ANTS FROM THE OTWAY RANGES. 
Prolasius hemiflavus , sp. nov. 
(PI. IV, fig. 28-29.) 
Worker. — Length, 2. 7-3. 2 mm. 
Head, thorax, node, antennae and legs ochraceous ; gaster brownish 
apex of segments yellowish. 
Smooth and shining ; head, thorax, antennae and legs very finely and 
densely punctate. 
Hair yellow, sparse, rather long, erect and bristle-like ; none on antennae 
and legs. Pubescence whitish, very fine and adpressed, hardly apparent on 
gaster. 
Head almost one-fourth longer than broad, sides strongly convex, occipital 
border straight or feebly concave. Mandibles triangular, furnished with six 
strong sharp teeth. Clypeus strongly convex, not carinate, anterior border 
rounded. Frontal area large, broadly triangular. Frontal carinae as long as 
broad in front. Scapes extending beyond occipital border by almost one-third 
their length ; first segment of funiculus larger than three following together, 
second and fourth as long as broad, third shorter, remainder longer than broad. 
Eyes large, placed at middle of sides. Ocelli prominent. Thorax barely 
twice as long as broad, sutures deeply impressed. Pronotum fully one-fourth 
longer than broad, sides straight. Epinotum broader than mesonotum, 
broader behind than in front, fully one-third broader than long, posterior 
border concave, sides convex. In profile the pronotum and mesonotum form 
a single convexity, mesonotum low, dorsum straight, epinotal declivity twice 
as long as dorsum, convex, the superior angle sharp. Node scale-like, bluntly 
pointed, convex transversely. Gaster one-fourth longer than broad. Legs 
rather long and slender. 
Female. — Length, 4.4 mm. 
Colour, sculpture and pilosity as in the worker. Head as broad as long, 
much broader behind than in front. Front edge of clypeus more acute than 
in worker, dorsum subcarinate in front. Scapes extending beyond occipital 
border by fully one-third their length. Thorax barely one-third broader than 
long. Pronotum short. Mesonotum one-third broader than long, dorsum 
flattened, parapsidal furrows not deeply impressed. Epinotum four times 
broader than long. Node scale-like as in worker. 
Habitat . — Beech Forest. 
This species is very common, being present in 
logs. 
Prolasius niger, sp. nov. 
most rotten 
(PI. IV, fig. 30.) 
Worker. — Length, 3.4-3.8 mm. 
Black ; mandibles, antennae and tarsi brown ; legs blackish brown. 
Smooth and shining. Mandibles feebly striate and punctate. Clypeus 
microscopically reticulate. Scapes and legs very finely and densely punctate. 
[68 1 
