442 Mr. F. Walker’s Notes on Chalcidites. 
twice the length of the 2nd, and more than half the length of 
the Ist; all the following joints short, 13th elongate, conical, 
longer than the 12th. Prothorax quadrate, much developed, 
broader than long, with a slight rim along each side. Mesothorax 
very short, hardly as broad as the prothorax. Scutum hardly 
half the length of the prothorax; sutures of the parapsides dis- 
tinct. Scutellum much shorter than the scutum. Metathorax 
quadrate, well developed, shorter than the mesothorax; hind 
border with a short stout spine on each side, and with a ridge in 
the middle. Petiole extremely short. Abdomen elliptical, smooth, 
shining, convex, broader and very much shorter than the thorax, 
with only one dorsal segment; tip setose. Legs stout; tibize 
with two short apical spurs; tarsi 5-jointed, slightly curved, the 
Joints successively decreasing in length; fore-femora slightly in- 
crassated. 
Myrmecopsis nigricans. 
Mas.—M. viridi-nigra ; antenne nigre, basi fulve ; abdomen 
cupreo-nigrum ; pedes rufi, tarsis nigricantibus. 
Male.—Greenish black. Antenne black; 2nd, 3rd, 4th and 
5th joints tawny. Abdomen cupreous-black. Legs red; tarsi 
blackish. 
Length of the body, 2# lines. 
Hab.—Northern Australia. 
