Records of Bees. 165 



tegulae (in lit fieri these are clear red). The second sub- 

 marginal cell is much narrower below than in littleri. The 

 tubercles are black (red in littleri). 



Launceston, Tasmania, Dec. 27, 1915 {Littler, 2272). 



Halictus ery thrums, Cockerel 1. 



Launceston, Tasmania, Dec. 19 and 25, 1915 [Littler, 

 2807). New to Tasmania. 



Halictus tasmania (Cockerell) . 



St. Helens, Tasmania, Jan. 1-1, 1916 (Littler, 2808). The 

 mesothorax is very faintly greenish. 



Trigona parastigma, sp. n. 



Trigona stigma, Cockerell, 'Psyche,' 1913, p. 11 (Las Sabanas, 

 Panama). 



A specimen from Maroni, French Guiana (Queensland 

 Mus., 53), differs from the Panama and Guatemala insect by 

 the larger, broader head, the sides of the face broadly and 

 strongly white-pruinose. This must be the true stigma, of 

 which Smith says, " head wider than the thorax, the face 

 anteriorly having a silvery pile." In the other form, which 

 I have hitherto regarded as T. stigma, the head is not so 

 conspicuously broad, and while the face has a very thin 

 pubescence, there is nothing to produce a white surface. The 

 male from Trinidad seems to belong to T. parastigma. The 

 two species are certainly very closely allied, and yet evidently 

 distinct. 



Andrena ribifloris, Viereck & Cockerell. 



$ . — Variety with pale hair, the long hair on first two 

 abdominal segments white. 



Near Gresham, Colorado, at flowers of Ribes saxosum, 

 June S{fV.P. Cockerell). 



Andrena opacissima, sp. n. 



? . — Length about 8 mm.; anterior wing 7*2 mm. 



Dull black, the head and thorax with long white hair, 

 faintly creamy dorsally ; facial quadrangle broader than 

 long; cheeks with very long hair; process of labrum small, 

 obtusely pointed ; clypeus w itli long hair, feebly punctured, 

 minutely transversely striate ; facial fovea) rather broad, 



