252 E. T. CRESSON. 



pubescence is long; tegulae piceous-black ; wings hyaline, apical third faintly 

 dusky, nervures and stigma fuscous; legs blackish with griseous pubescence, 

 changing to pale yellow in certain lights; abdomen smooth and shining, very 

 minutely punctured, base of first segment and extreme sides of all the seg- 

 ments with pale pubescence, which is also thinly scattered over apical seg- 

 ments, basal margin of segments 2 — 4 with a narrow fascia of short dense white 

 pile, anal rima brown. Length .35 inch. 



Two specimens. (Belfrage.) Closely allied to similis, but the 

 punctures on head and thorax are more dense, the pubescence paler, 

 the base of metathorax more finely sculptured, the tegulae black, the 

 wing nervures fuscous, the pubescence of legs paler and the abdomen 

 less shining and more closely and finely punctured. 



Hal ictus ornatipes, n. sp. 



% . — Narrow, black, closely and finely punctured, thickly clothed with 

 griseous pubescence; sides of face and base of clypeus with short dense white 

 pubescence; clypeus produced, lemon-yellow, base black; labrum and mandi- 

 bles except tips also lemon-yellow; cheeks with long white pubescence; flagel- 

 lum j'ellow-testaceous beneath; scutellum smooth and shining, sparsely punc- 

 tured; base of metathorax finely rugulose, sides closely punctured; tegulae 

 pale yeliow, with a dusky pupil ; wings hyaline, subiridescent, nervures and 

 stigma honey-yellow; legs black with white pubescence, knees, tibiae, except 

 elongate blackish spot on each side, and tarsi lemon-yellow; abdouieu elong- 

 ate, subconvex, with scattered pale pubescence, apical margin of all the seg- 

 ments with a fascia of whitish pubescence more dense laterally, apical margins 

 of all the segments narrowly dull rufo-testaceous. Length .30 — .35 inch. 



Four specimens. (Belfrage; Boll.) This may prove to be the £ 

 of armaticeps. 



Halictus impurus, n. sp. 



9 .—Blue-green, shining, clothed with a short erect or suberect pale pubes- 

 cence, very dense on the face ; head densely and finely punctured ; clypeus 

 squarely produced at tip, which is margined with testaceous; labrum, tips of 

 mandibles and flagellum beneath also testaceous; mesothorax and scutellum 

 smooth and polished; metathorax rugose, the basal space with radiating striae; 

 tegulae and tubercles testaceous; wings hyaline, iridescent, nervures fuscous, 

 stigma paler; legs shining black, with pale pubescence, knees, tibiae and tarsi 

 pale testaceous, tibiae with a dusky mark on outer middle; abdomen elongate, 

 convex, smooth and shining, with a short thin pale pubescence, rufo-testace- 

 ous, more or less blackish at base and apex; venter paler than above. Length 

 .32 inch. 



Two specimens. (Belfrage.) 



Ilalictus lusorius, n. sp. 



2 . — Black ; head and thorax closely and finely punctured, thinly clothed 

 with a griseous pubescence; head small; clypeus produced, shining, with 

 large scattered punctures, apex fringed with long yellowish hairs; mandibles 

 rufo-piceous at tips; mesothorax with a well-impressed central line; base of 

 metathorax finely longitudinally rugose; tegulae dull testaceous; wings long, 



