NORTH AMKRICAN PIYMENOPTERA. 145 



IVotes on Bees, with Descriptions of IVew Species. 



BY CHARLES ROBERTSON. 



Spliecodes stygius 9 .—Black, shining, clothed with thin white pubes- 

 cence, slightly inclining to fuscous on the vertex and disc of mesotborax : man- 

 dibles not dentate, honey-yellow ; flagellum testaceous beneath; vertex not tu- 

 berculate; disc of mesotborax with coarse, moderately close punctures, rugose 

 anteriorly, metanotum with semi-circular enclosure having coarse reticulations; 

 tegul?e testaceous exteriorly ; wings hyaline, slightly dusky towards the tip, 

 nervures and stigma fuscous; apical joints of tarsi dull testaceous: abdomen 

 shining and impunctate at base, becoming more opaque and more punctate on 

 apical segments; fii'st and second segments red, with a fuscous patch on the disc 

 of each, remaining segments black, more reddish laterally, and with broad, dull 

 testaceous, apical margins. Length 5 mm. 



% . — Eesembles the 9 ; the antenufe darker, not moniliform, third and fourth 

 joints subequal, enclosure of metanotum a little less distinct, tarsi a little paler: 

 abdomen with sides of first, second, and sometimes third segments red. Length 

 5 mm. 



Hah. — Illinois ; one female, seven male specimens. This species 

 closely resembles S. mandibularis Cr., but may be distinguished by 

 its larger size, simple mandibles, more closely punctured mesotborax, 

 darker colored abdomen, and darker tarsi. 



Halictns arcnatu.s 9 • — This species closely resembles H. similis Sm., and 

 probably has been confused with that species. It is distinguished by its form a 

 little more robust, its clypeus a little less produced ; metathorax broader, shorter, 

 rounded posteriorly, instead of being sharply truncate; metanotum moie irreg- 

 ularly reticulated; hind spurs with the teeth less obvious; abdomen not so 

 black, a little more punctured, the apical margin more broadly testaceous. 

 Length 7 — 9 mm. 



Hah.- — Illinois ; thirty-five specimens; I think this is the insect 

 identified as H similis by Cres.son in his " Hymenoptera Texana." 

 H. similis was so named from its resemblance to H leucoso)iiiis, a 

 species with sharply truncate metathorax. 



Halictns zonnlns 8m. 



Prof. J. Perez, of Bordeaux, France, has sent me specimens of 

 this species from Europe, with specimens received by him from 

 Canada. He regards them as identical. H. discus Sm. is probably 

 this species. The American Entomological Society's collection con- 

 tains numerous specimens from New Hampshire. 



Halictns parallelns Say (= H. occidentalis Cr.). 



Say describes his species as having the " wings and feet ferrugin- 

 ous," which is a sufficient characterization of it. Smith, who evi- 

 dently never saw Say's species, supposed H lerouxii Lep. to be the 



TEANS. AM. ENT. SOC. XX. (19) JUNE. 1893. 



