294 On new Bees pom the State of Vera Cruz. 



deeply grooved without. Antennge short, wholly dark ; 

 flagellum beneath becoming very dark coffee-brown. Thorax 

 very small, the pubescence only conspicuous on the pleura ; 

 raesothorax strongly and very closely punctured ; scutellura 

 more sparsely punctured ; postscutellum with close smaller 

 punctures. JMetathorax finely punctured, the enclosure 

 strongly rugose-cancellate, not bounded by a sharp rim. 

 Tegulse dark mahogany-brown. Wings pale fuliginous ; 

 stigma dark dull yellowish brown ; nervures fuscous ; third 

 submarginal cell narrowed fully one half to marginal. Tibigs 

 and tarsi with tolerably dense pale fulvous pubescence ; hind 

 femora, cox£e, and trochanters beneath with rather copious 

 hairs, which in the type specimen are largely covered with 

 orange pollen. Abdomen only moderately shiny, minutely 

 and very closely punctured ; conspicuous bands of appressed 

 dirty white hairs (more or less rubbed off in type specimen) 

 on hind margins of segments 1 to 4, the adjacent bases of the 

 segments also bearing thinner hair-bands. 



Another example has the abdominal bands better defined, 

 the bands are narrow on segments 1 and 2, coming almost to 

 a line in middle, but broad, even, and very white on segments 

 3 and 4. In another the band on segment 1 is broadly inter- 

 rupted ; this last has the hind legs covered with orange pollen. 



San Rafael, March 8 and 23, on Bidens and another com- 

 posite. 



A very distinct species, allied to H. ligatus, which frequents 

 Compositje in the United States. II. politus, Smith, which 

 was also taken at San Rafael, is somewhat similar in general 

 appearance. 



(12) Halictus pseudotegularis, sp. n. 

 ? . Length about 5 millim. Head and thorax dark green ; 

 abdomen black, pruinose ; tegula black, punctured. This is 

 so near to the U.S. H. tegularis, Rob., that a comparative 

 description is needed for its identification : — 



H. tegularis 5 • H. pseudotegularis $ . 



Face broad, inner orbits arcbed. Face narrow, inner orbits nearly 



straight. 

 Head and tborax bluish p-een. Head and thorax brassy green. 



Marginal cell rather longer and Stigma somewhat darker, 



second submarginal larger. Enclosure of metathorax more 



triangular, hardly so strongly sculp- 

 tured. 



Abdomen somewhat narrower. 

 Median groove of mesothorax Median groove of mesothorax 



obscure. very distinct. 



Wings clear. VVings slightly dusky. 



Paso de Telaya, March 29, on Argemone mexicana. 



