56 THE ENTOMOLOGIST. 



NEW AUSTEALIAN BEES IN THE COLLECTION OF 

 THE BRITISH MUSEUM.— II. 



By T. D. a. Cockerell. 



Halictus. 



The following species are black, the abdomen without hair- 

 bands or patches. They are named after well-known Australian 

 explorers : — 



Mesotboras shining, with widely scattered punc- 

 tures ........ 1. 



Mesothorax dull, very closely or at least {forresti) 



rather closely punctured ..... 2. 



1. Very small ; area of metathorax very finely and 



regularly longitudinally striate .... burkei, Ckll., ? . 

 Larger ; area of metathorax irregularly longitudi- 

 nally wrinkled ....... sturti, Ckll., $ . 



2. Area of metathorax with very coarse vermiform 



ridges ....... forresti, Ckll., ,S • 



Area of metathorax not so . . . . . 3. 



3. Most of clypeus yellow ; size largest, length about 



10 mm., male ...... ivarbHrto}ii, Gldl. 



Clypeus all black ; size smaller, females . . 4. 



4. Area of metathorax delicately irregularly reticulate mitchelli, Ckll. 

 Area of metathorax finely striate with raised lines 5. 



5. Second submarginal cell large, approximately square, 



except that the second t. c. slants inwards above leichardti, Ckll. 

 Second submarginal cell narrower, much higher 



than broad ....... nillsi, Ckll. 



The microscopic characters of these species are as follows : — 



(1.) Front. 



H. warhurtoni. — At sides cribrately punctured, with very large 

 shining punctures, covering the surface ; but in middle, below 

 the ocelli, dull, with a very feeble mallear sculpture. 



H. mitchelli. — Contiguously punctate all over, the lateral 

 areas not so strongly as in ivarburtoni, and the median area dis- 

 tinctly and regularly, though the punctures are small. 



H. burkei. — Dullish, with small but distinct punctures, which 

 are moderately dense ; the ground between them is roughened by 

 little lines. 



H. willsi. — Not unlike burkei, but punctures closer. 



H. sturti. — General type of willsi and burkei, but punctures 

 laterally becoming sparse and weak, and nowhere are they 

 strong. 



H. leichardti. — With close small punctures all over. 



H. forresti. — With small and quite close, but by no means 



