AUSTRALIAN HALICTINE BEES. 243 
mesothorax and scutellum with scanty fuscous hair; tegule piceous, 
shining dark reddish posteriorly ; wings dusky hyaline, stigma and 
nervures sepia, outer nervures weakened; first r.n. joining second 
s. m. at extreme apex; middle and hind tibie and tarsi with fuscous 
hair on outer side; first two abdominal segments shining, finely 
punctured, the others dull, and without distinct punctures, except 
the piliferous ones; venter with silvery white hair, on the apical 
segments with fuscous. 
Hab. Calsundra, Queensland, October 80th, 1912 (H. Hacker ; 
Queensland Museum, 88). Closely related to P. plorator, CkIl., 
but the wings are not so dark, and the punctured first two 
abdominal segments are highly distinctive. DP. fwmidicauda, 
CkIl., is larger, and has a very different metathorax. 
Halictus melanopterus, sp. n. 
@. Length nearly 10 mm.; black, including the legs and 
antenne ; head broad, with white hair, which is thin on face, con- 
spicuous on cheeks ; long pale golden hairs from a fringe below lower 
margin of clypeus; clypeus and supraclypeal area shining, distinctly 
but not densely punctured ; front entirely dull except at sides, where 
it is somewhat glistening; thorax with thin white hair, quite 
abundant on pleura, mesothorax and scutellum with inconspicuous 
fuscous hair; tubercles (as seen from in front) ending in a point; 
mesothorax and scutellum shining, very finely and quite closely 
punctured ; scutellum sulcate in middle; area of metathorax large, 
bulging at sides, very finely roughened, without distinct sculpture ; 
posterior truncation shining; tegule rufopiceous; wings strongly 
stained with blackish, stigma rufopiceous, nervures sepia; outer r. n. 
and t. c. weakened ; second s. m. broad, receiving first r. n. a short 
distance before end; hind legs with dark fuscous hair over knees ; 
abdomen shining, very finely punctured ; long-triangular patches of 
dull white tomentum at basal sides of segments 2 to4; apex with 
dark fuscous hair; no ventral scopa. 
Hab. Yallingup, near Cape Naturaliste, S.-W. Australia, 
September 14th-October 31st, 1913 (R. E. Turner). British 
Museum. H. melanopterus is very near H. instabilis, Ckll., but 
larger, with darker wings and darker stigma, and the abdominal 
bands not entire. The abdomen is much like that of H. circum- 
datus, Ckll., but the metathorax is quite different. It is much 
larger than H. chapmani, Ckll., and is readily known from 
H. convexus, Sm., by its dark wings. 
Halictus disclusus, sp. n. 
g. Length about 6 mm.; black, with the first three abdominal 
segments bright chestnut-red, but the first dark basally and with a 
large dusky median cloud, second and third segments with a dark 
spot at each laterobasal corner; knees, tibiz and tarsi ferruginous, 
the tibie (the first slightly, the last most) stained with blackish ; 
head broad, eyes strongly converging below; clypeus prominent, with 
a broad pale yellow apical band; labrum black; mandibles whitish 
