352 T. D. A. COCKERELL. 



not nearly so dark, and not so long ; base of metathorax with no 

 enclosure, but shining, with very strong longitudinal ridges; the 

 smooth shiny niesothorax, with large widely separated punctures, 

 etc. The hind spur has short saw like teeth. Tegulse shining, dark, 

 with a red spot ; stigma fulvo-ferruginous, and remarkably small ; 

 third s. m. rather narrower than in fusdpennis ; abdomen shining, 

 with strong well separated punctures ; the depressed apical portions 

 are also punctured; bases of segments 2-4 with dull white hair- 

 bands. Certainly very close to H. zonulus ; of the latter I found 

 only males in the Museum. 



Ilalitliis iiymphalis Sm. 9 (T.i. 



Small, only about 5 mm. long ; in Robertson's tables runs to 

 testaceus. Hind spur with few long spines; apical half of abdomen 

 largely fuscous, and very hairy ; basal half shining reddish- 

 testaceous ; stigma light honey color; area distinct, very finely 

 rugose wrinkled ; niesothorax yellowish-green, closely and distinctly 

 punctured ; all the knees pale reddish. 



Hal ictus zephyrus Sm. % . 



Much larger than namphalis ; length about 62 mm.; abdomen 

 shining dark brown, with a greenish reflection, especially on first 

 segment. Runs to zephyrus in Robertson's tables. 



fialictus similis Sm. £ (T.). 



A broad thick-set bee, with third s. m. not elongated ; abdomen 

 with basal bands, mainly developed at sides, on segments 2 and 3 ; 

 hind spur serrate. Appears \o be a Lasioglossuvi, sens. Rob., and 

 has metathorax sharply truncate ; basal enclosure not distinctly 

 defined, and with numerous strong longitudinal keels. The first 

 abd. s. is minutely but very distinctly punctured all over. Stigma 

 very dark brown; apical fimbria of abdomen light fulvous; nieso- 

 thorax closely punctured. 



Closely allied to H. discus, but smaller, metathorax much less 

 shiny, stigma darker, etc. It cannot be H. truncatus, because of 

 punctured first abd. s., and hind spur without long teeth ; and it is 

 not H. arcuatus, because of sharply truncate metathorax. 



Halictus agilis Sm. " (T.). 



Is a true Halictus, very distinct from any U. S. species known to 

 me. Third s. m. quite twice as big as second, but very broad at 

 top, and outer side without any distinct double curve ; b. n. not 



