Sept., I9I4-] Ellis: New Bees of Genus Halictus. 221 



punctures less crowded on either side of the median groove ; disc of the meta- 

 thorax without a rim, basal area coarsely lineolate and with numerous short 

 simple plicae, concave in the middle, the posterior margin broad, rounded and 

 shiny, elevated near the middle but not forming a rim truncating the most 

 lateral of the plicje ; tegulse dark testaceous ; wings slightly brownish and 

 dusky, stigma and nervures brown ; legs black, knees and tarsi of the last two 

 pairs of legs light brown ; abdomen very shiny, disc of the first segment im- 

 punctate, margins not lighter than the rest of the segments ; pubescence scant, 

 pale yellowish gray on the legs where it is most abundant. 



Habitat. — Guayaquil, Ecuador, i (^type) May-June, 1913 (C. 

 T. Brues). 



Halictus chrysonotus new species. 



Female 5 mm. Head and thorax dark metallic green, mesonotum golden 

 green, abdomen very dark brown to almost piceous, with distinct olive green 

 reflections : facial quadrangle almost if not quite as broad as long, clypeus 

 rather narrow at its base, produced half its length below the eyes, lateral areas 

 and the supraclypeal area sharply lineolate; distal two-thirds of the flagellum 

 ochraceous ; mesonotum rather broad, closely and rather coarsely punctured, 

 the punctures more crowded about the parapsidial grooves than elsewhere, 

 sharply but finely lineolate ; scutellum more shiny than the mesonotum, the 

 punctures finer, less distinct and not so close ; disc of the metathorax without 

 a rim, the basal area sharply narrowed on the sides, forming a truncated tri- 

 angle with rather sharp rugose plies radiating from the basal margin of the 

 segment, the outer margin of the basal area very slightly elevated on either 

 side of the middle ; wings a little brownish, tegulae and stigma bright testa- 

 ceous, nervures dark brown ; legs black, knees and tarsi bright brown, inner 

 spine of the hind tibia with but three teeth, the first almost half as long as 

 the spine, rounded at the free end and almost cylindrical ; abdomen very shiny, 

 the disc of the first segment almost impunctate, very dark brown shading into 

 red brown on the broad margins of the segments, the whole with elusive olive 

 green reflections ; pubescence scant, light brownish on the legs, grayish below. 



Habitat. — Guayaquil, Ecuador, i (=type), May-June, 1913 (C. 

 T. Brues). 



Halictus graenicheri2 new species. 



Female 5 to 5.5 mm. Head and thorax olive green; abdomen clear, red- 

 dish amber-color, without darker clouds or markings ; margins of the segments 

 pale testaceous. Facial quadrangle a little longer than wide, but not elongate, 

 perceptibly narrowed below; distal half of the clypeus black; hair on the lat- 

 eral areas of the face rather abundant and of a dirty white color; mesonotum 

 sharply lineolate, with moderately coarse, sharp, close punctures ; no rim 

 around the truncation of the metathorax ; basal area of the metathorax rather 

 broad and quite concave, its distal margin elevated across the middle so as to 



2 Dr. S. Graenicher, Public Museum, Milwaukee, Wisconsin. 



