236 HYMENOPTERA. 



lanuginosus, but says the clypeal margin is white ; the an- 

 tennae of this species are short in the male, simulating a fe- 

 male, and readily accounting for the mistake. A male in 

 the Berlin Museum is from Adelaide (Bekr), and has been 

 labelled by someone " Halictus infimus Er. ? ?." Erichson's 

 species was described as an Andrena in 1841 ; it may belong 

 to Halictus, but the description is insufficient for its identifi- 

 tion. Another male, from Adelaide {Schomburgk) , is rather 

 less robust, and the second s. m. is very small and narrow. 

 It is evidently an abnormal specimen. A female from Ade- 

 laide {Schomburgk) is smaller than usual (8 mm.), with the 

 hind spur nodulose, and the tegulae lighter. I was at first 

 inclined to believe it distinct, but now conclude that it is 

 only an individual aberration. 



Halictus eambagei sp. nov. 



c?. Length about 5^ mm. ; black, with the abdomen and legs very 

 dark brown, whole insect hoary with grayish-white pubescence. This 

 is a male having relatively short antennae, and a robust form, exactly 

 simulating a female, and evidently to be associated with H. lanarius, 

 from which it is easily known by its small size and shining mesothorax. 

 Head broader than long ; face broad, with much white hair ; lower 

 half of clypeus cream-colored, the edge very narrowly ferruginous ; 

 mandibles ferruginous except at base ; scape rather short, shining 

 black ; flagellum obscurely brownish ; face and clypeus shining, front 

 dull ; with a microscope the front is seen to be densely minutely punc- 

 tured ; mesothorax very shiny, with scattered evident punctures, the 

 microscope showing a smooth surface, with occasional very minute 

 punctures between the larger ones ; scutellum brilliantly shining ; area 

 of metathorax with a very minute irregular reticulate sculpture, and 

 a broad smooth shining rim ; posterior truncation hardly defined ; 

 tegulae shining rufous ; wings hyaline, iridescent, nervures and stigma 

 dull reddish-brown, not dark ; second s. m. broad, receiving first r. n. 

 very near end , third t. c. greatly bulging outwards; knees and tarsi 

 rather obscure reddish ; abdomen shining, thinly pilose, no hair-bands, 

 nor any distinct patches, though the hair is a little more dense at sides 

 of base of second and third segments, in some specimens forming 

 obscure patches ; second and third segments with very fine rather close 

 hair-punctures. The second r. n. and third t. c. are very- distinct, 

 not very weak or almost obsolete as in H. humei and H. globosus. 



Hab. — Adelaide, Australia {Behr) . Berlin Museum; four 

 males. 



