T. D. A. COCKERELL. 229 



thorax bluish-green inclining to steel-blue, not brilliant ; tegulae clear 

 rufotestaceous ; wings clear, nervures and stigma reddish-brown, outer 

 nervures weakened as in Chloralictus ; abdomen dark purplish, the api- 

 cal segments greenish, hind margins of segments dark reddish-brown ; 

 a well formed ventral scopa of curled white hairs as in H. flindersi ; 

 coxse, trochanters and femora dark, more or less metallic ; knees, tibiae 

 and tarsi more or less ferruginous, but anterior tibia behind, middle 

 and hind tibiae and hind basitarsus mainly dark, though not metallic. 

 Lower edge of clypeus fringed with yellowish hairs ; mandibles ferru- 

 ginous, except at base ; scape long, basal half ferruginous ; apical part 

 of flagellum red beneath ; area of metathorax with a very coarse reticu- 

 late sculpture ; apical truncation sharply defined at sides ; seconds, m. 

 rather large. Clypeus with distinct widely separated punctures ; sides 

 of front with a minute cancellate sculpture ; mesothorax minutely 

 roughened, with shallow punctures; hair of hind tibiae and tarsi, and 

 of abdominal scopa, very strongly plumose ; hind spur peculiar, with 

 two very large and thick obtuse teeth ; abdomen with the usual fine 

 transverse lineolation. 



Close to H. flindersi, but differing in details of color and 

 sculpture. 



Hab. — Port Darwin, Australia, November, 1902 ( Turner) . 

 British Museum. 



Halictus woodsi sp. nov. 



9 . Length about 61 mm. ; similar to H. fli?idersi, var. a, but differ- 

 ing thus : face narrower ; upper half of clypeus brilliant green ; area 

 of metathorax longer, with more pronounced longitudinal ridges ; ab- 

 domen greenish, the hind margins of the segments very narrowly but 

 evidently red. The hind femora are distinctly twisted, and the ven- 

 tral abdominal scopa is well developed. The flagellum is reddish at 

 apex. Front transversely striate just below the ocelli, reticulate below 

 that, but longitudinally striate on each side; mesothorax microscopi- 

 cally tessellate, with piliferous punctures, the anterior ones forming 

 distinct lines, with little ridges ; hind spur with large teeth. 



cf. Length about 5 mm., rather slender, but looks like a female, 

 the abdomen being short, and the flagellum comparatively short and 

 thick, its length little over one mm. ; clypeus shining, without any 

 pale border; knees, tibiae and tarsi ferruginous, the tibiae more or less 

 clouded with dusky. 



Hab. — Cooktown, Australia (type locality), Oct., 1902, one 

 female {Turner); Port Darwin, Dec, 1902, one male ( Tur- 

 ner). British Museum. 



The following table separates a number of Australian 

 Halictines in which the mesothorax is not black. 



TRANS. AM. ENT. SOC, XXXVI. AUGUST, 1910. 



