220 Journal New York Entomological Society. I^'o'- ^>^n. 



without a rim ; lateral areas of the metathorax bulging a little beyond the 

 margin of the basal area, basal area sharply lineolate and with a few simple 

 but rather strong plicae, margin of the basal area shiny, slightly elevated across 

 the middle ; wings pale brownish, stigma and nervures light brown, costal ner- 

 vure darker ; tegulae testaceous, appearing almost colorless ; legs blackish, the 

 knees and tarsi clear red brown ; abdomen broad and shiny, the disc of the 

 first segment very finely lineolate but with only very minute punctures, the 

 other segments finely but coarsely punctured ; pubescence very scant, buffy 

 on the legs, pale yellowish around the anal rima. 



Habitat. — Quirigua, Guatemala. I (= type), at flowers of 

 Ipomcca qninquefoUa Griseb. February 20, 1912 (Mrs. W. P. 

 Cockerell). 



The paucity of pubescence may be correlated with the age of the 

 specimen as indicated by the somewhat tattered and worn condition 

 of the wings. 



Halictus exiguiformis new species. 



Female 5 mm. Head and thorax dark metallic green, abdomen piceous, 

 the broad margins of the segments dark brown. Facial quadrangle almost as 

 broad as long, almost the entire length of the clypeus produced below the eyes, 

 the lateral area of the face sharply lineolate but not so closely punctured as 

 in H. tropicior Ellis ; supraclypeal area sharply lineolate, with fine scattered 

 punctures, clypeus, except for a narrow black margin, green like the rest of 

 the head ; flagellum lighter below ; mesonotum finely lineolate, the punctures 

 fine and widely scattered on either side of the median groove, crowded on 

 either side of the parapsidial grooves and along the posterior margin of the 

 segment ; metathorax short and rather narrow, no rim around the disc, basal 

 area lineolate, with a few short simple plies, the posterior margin not at all 

 elevated; tegulse dark brown; wings distinctly brownish, nervures and stigma 

 dark brown ; legs piceous, shading to reddish brown on the tarsi ; abdomen 

 shiny, the disc of the first segment almost impunctate, disc of the following 

 segments with very fine punctures ; pubescence scant, pale grayish buff on the 

 sides of the abdomen, around the anal rima, on tlu> nu-sonotum and on the 

 legs, more grayish below. 



Habitat. — Guayaquil, Ecuador. i (=rtype) (von Buchwald, 

 Alfken collection number 23). 



Halictus hypochlorus new species. 



Female 5 mm. Head and thorax dark metallic green, more or less shiny ; 

 abdomen blackish with dark metallic green reflections. Facial quadrangle 

 about as wide as long, clypeus produced half its length below the eyes, lateral 

 areas of the face and supraclypeal area rather shiny ; mesonotum not siiarply 

 lineolate, a little shiny but ratlur coarsely and \cry closely imncturtd, the 



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