Vol. XXviiJ ENTOMOLOGICAL NEWS. 63 



9. Mesothorax distinctly green, rather closely punctured all over; an- 



tennae very long (New Mexico) oryx Vier- 



Mesothorax shining hlack 10 



10. Disc of mesothorax sparsely and weakly punctured, .hari'cyi Ckll. 

 Mesothorax with strong well separated punctures. saitndcrsi Ckll. 



11. Clypeus polished, hardly punctured, with a projecting lobe at each 



lower corner (New Mexico) fallugiae Ckll. 



Clypeus roughened or conspicuously punctured 12 



12. Mesothorax entirely dull; small Halictus-like species (New Mex- 



ico) tinslcyi Ckll. 



Mesothorax shining 13 



13. Front and vertex bluish ; abdomen with white hair-band on third 



and fourth segments mullcri Ckll. 



No blue tints 14 



14. Abdomen with conspicuous white hair-bands rirgatits Ckll. 



Abdomen without hair-bands 15 



15. First four segments of abdomen with very broad and conspicuous 



testaceous hind margins, (S. Calif.) saundersi Ckll. 



Abdominal segments not thus margined (N. M.) . .harreyi Ckll. 



Halictoides pulchricornis n. sp. 



<3 . Length about 7 mm., slender, black, shining ; head and thorax 

 with long white hair, dense and pure white on face ; head broad, facial 

 quadrangle broader than long; mandibles black, dark red at apex; 

 labial palpi with first joint about 270 microns long, the other three to- 

 gether about 400, the second joint about 170; joints of maxillary palpi 

 subequal, the shortest much more than half length of longest; antennae 

 long, the flagellum, except at base, bright orange-fulvous, dusky above. 



Mesothorax polished, hardly punctured; area of metathorax depress- 

 ed, shining, the basal half with fine plicae; tegulae rufotestaceous ; 

 wings hyaline, stigma amber color, nervures darker ; b. n. falling short 

 of t. m. ; legs black with white hair ; middle femora short and deep ; 

 hind tibiae large. 



Abdomen with hind margins of segments broadly ferruginous, bases 

 of segments with thin white hair-bands ; apical plate small, spatulate. 



9. More robust; clypeus shining, with rather large shallow punc- 

 tures; flagellum very short, bright orange-fulvous, except at base: face 

 very broad; vertex depressed on each side of ocelli; abdomen broad. 



pfab. Mesilla Park, New Mexico, at flowers of plum. April 

 14 (Cockcrcll}. Allied to //. saniidcrsi Ckll., but easily sep- 

 arated by tbe clear wings with amber stigma, and the very 

 feeble, evanescent punctures. 



Type in my collection. 



