1916.] NATURAL SCIENCES OF PHILADELPHIA. 371 



finely punctured, apical half of second segment punctured, not 

 lineolate. 



Hab. — Type from Yarrawin, X. S. \\\, (Froggatt 225). AJso two 

 from Brewarrina, N. S. W., 1914 (Froggatt). The basitarsi may be 

 distinctly yellowish. By the general form and very long antennae 

 this resembles //. hamatojms Ckll., but it is readily distinguished 

 by the shining mesothorax. 



Halictus supralucens sp. n. 



9. Length about 6.5 mm.; of ordinary form, black, with rather 

 scanty white hair; dense bands of pure-white tomentum at extreme 

 bases of second to fourth segments, the central part on second hidden 

 by overlapping first segment; legs very dark brown, with pale hair. 

 Head broad; mandibles black, with a faint red subapical spot; 

 clypeus shining, with irregular strong punctures; front dull except 

 at sides, finely striate; antennae dark, flagellum with a very obscure 

 reddish tint beneath; mesothorax shining, with irregular large and 

 small punctures, the disc not lineolate or reticulate; parapsidal 

 grooves deeply impressed; scutellum flattened, depressed in middle, 

 strongly polished, almost entirely impunctate; area of metathorax 

 large, poorly defined, appearing rugose from a fine raised reticulation, 

 but the apical part smooth and shining; hind basitarsi with apical 

 brush brilliant orange-ferruginous; tegulse rather dark chestnut-red; 

 wings dusky, nervures brownish; stigma large, dull amber-color; 

 second s. m. large; first r. n. meeting second t. c. or joining apical 

 corner of second s. m.; abdomen shining at base, duller beyond, with 

 extremely fine punctures; caudal rima fringed with brown hair; 

 venter with white hair, not forming a curled scopa. 



Hab.— Kalamunda, S. W. Australia, Feb. 9-28, and at 850 ft., 

 March 1-11, 1914. (R. E. Turner; Brit. Museum.) Near H. 

 mediopolitus Ckll., but sculpture of mesothorax entirely different. 

 Easily known from H. orbatus Sm. by the polished scutellum. 



Halictus demissus sp. n. 



9 . Length nearly 5.5 mm.; black, with the mesothorax shining 

 green, polished, with sparse punctures of different sizes, the parapsidal 

 grooves very distinct; scutellum also polished, but not green; pubes- 

 cence scanty, dull white, the abdomeD without hair-bands or spot-: 

 mandibles chestnui red except basally; clypeus shining, front dull 

 and granular; flagellum entirely dark; area of metathorax large, 

 with delicate but very distinct radiating stria 1 ; legs black; wings 

 hyaline, nervures and the very large stigma sepia; firsl r. n. joining 



