218 Journal Xew York Entomological Society. fVoi. xxii. 



Fig. I 

 Fig. 2 

 Fig. 3 

 Fig. 4 

 Fig. 5 



EXPLAN.\TI0N OF PlATE V. 



Wing of Tanypremna loiigipes Fabricius. 



Wing of Tanypremna opilio Osten Sacken. 



Wing of Tanypremna colunibiana Enderlein (after Enderlein). 



Wing of Tanypremna regiiia n. sp. 



Wing of Megisiocera longipennis Macquart. 



NEW BEES OF THE GENUS HALICTUS (HYM.) 



FROM UNITED STATES, GUATEMALA 



AND ECUADOR.! 



By ]\Iarion Durbin Ellis, 



Boulder, Colorado. 



Below are presented the descriptions of six new bees belonging 

 to the genus Halictns (CJiloralictits). Two of these species, one from 

 Wisconsin and one from New Mexico have the abdomen amber yellow 

 and show no close affinities with the remaining four from tropical 

 America. These last four species together with H. cxiguus Smith 

 and H. deceptor Ellis, have several characters in common and seem 

 to be closely related. They show more or less distinct resemblance 

 to the species related to H. cephyrus Smith, a common form in the 

 United States. Among the species most like H. zcphyriis is H. umbri- 

 pennis Ellis, found in Guatemala. This species is however a very 

 distinctive form of a uniform olive color with fuscous clouded wings 

 and is not to be confused with the six much smaller species here 

 considered. These six bees arc all small being 5 mm. or less in 

 length; all except H. deceptor have the facial quadrangle almost, if 

 not quite, as broad as long; in each the punctures of the mesonotum 

 are more crowded about the parapsidial grooves than elsewhere, the 

 basal area of the metathorax is without a rim truncating the lateral 

 plicae, the wings are brownish and the abdomen is very shiny, especially 



1 The specimens upon which these descrii)tions are based are part of the 

 collections of Professor T. D. A. Cockercll. I wish to thank Professor Cock- 

 erell for help and direction in the present study, undertaken in the zoological 

 laboratory at the University of Colorado. 



