Dec, 1907. ] Crawford: Notes on Halictus. 189 



Halictus arizonensis, new species. 



9 . — Head and thorax black, shiny, ahiiost impunctate and covered with 

 appressed white pubescence ; antennre beneath, clypeus apically, tubercles and legs 

 reddish testaceous ; nietathorax finely wrinkled at base, the apex smooth, shiny ; wings 

 white, stigma and nervures very light testaceous, only the subcosta dark ; hind inner 

 spur with about three long teeth ; first two segments of abdomen mostly reddish, 

 rest black medially, laterally reddish, except the last which is entirely reddish ; 

 apical margins of segments broadly whitish. Length about 5^ mm. 



One specimen from Arizona in the C. F. Baker collection. 

 Type. — No. 10930, U. S. National Museum. 



Halictus quebecensis, new species. 



9 • — Black, head and thorax lineolate, dull, facial quadrangle about square, 

 face below antennre sparsely finely obliquely punctured, punctures opening downward 

 and outward ; punctures at sides of face becoming close only some distance above 

 antennae ; rest of face above antennse closely finely punctured ; vertical striae of the 

 cheeks very apparent ; pubescence of head and thorax short, thin, ochraceous ; meso- 

 thorax finely rather sparsely punctured ; median groove well impressed, parapsidal 

 grooves distinct ; mesopleurse rather finely rugulose, metapleurse anteriorly finely so, 

 posteriorly finely lineolate and only slightly rugulose ; base of metathorax with a 

 few rather strong irregular longitudinal plicae reaching apex ; truncation finely lineo- 

 late and with a few scattered punctures, surrounded by a salient rim, faint above 

 medially but distinct at upper lateral angles ; wings yellowish, darkened apically ; 

 nervures and stigma honey-color, .subcosta dark ; second submarginal broad; third 

 narrowed about one third to marginal ; tegulae dark, with a red center and a narrow 

 light border ; legs dark, apical joints of tarsi ferruginous, pubescence of legs ochra- 

 ceous, becoming reddish on apical joints of tarsi ; hind inner spur with about five 

 long teeth ; abdomen black, somewhat shiny, with sparse ochraceous pubescence at 

 base and apex, and on apical margins 2-4 laterally and bases 2-3 laterally very faint 

 white hair spots, that surrounding the anal rima reddish ; abdomen finely trans- 

 versely lineolate almost impunctate, under a high power showing a few scattered 

 very fine punctures. Length about 8 mm. 



Montreal Island, Quebec, May 21, 1904, received from C. F. 

 Baker; also North Sangus, Mass. (J. C. Crawford coll.), 



Halictus ligatus Say. 



In the tables the various forms in which the females have the 

 cheeks armed with a spine are not separated from this species, since 

 they are very closely allied and an abundance of material is needed to 

 work out their status. These forms are armaticeps Cresson, capitosus 

 Smith, texaniis Cresson, and toitnisendi Cockerell. 



