48 UNIVERSITY OF COLORADO STUDIES 



The following new locality-records are interesting for various reasons^ 



Spinoliella zebrata (Cresson). Alamosa, Colo., Aug. 6, 1903 (S. A. Johnson). (3> ?• 

 One male was taken "over Spanish peas, in meadow." This species was previously known 

 only from a single female reported vaguely from " Colorado." 



Melanostelis pulchra {Stelis pulchra Crawford, 1902); variety with dark flagellum 

 and tegulx. Boulder, Colo., at flowers of a small vinelike Astragalus, June 12, 1905 

 (W. P. Cockerell). New to Colorado; previously known only from Nebraska. 



Halictus lerouxii var. ruborum Ckll. (new to Colorado), H. armaticeps Cresson, and 

 H. pruinosus Rob., all females, were taken by my wife at flowers of Berberis repens at 

 Boulder, April 6, 1905. 



Perdita afjinis Cresson, 5 (a small specimen), was found on a petal of Argemone 

 intermedia at Boulder, June 24. It does not normally visit Argemone, and presumably 

 its presence there was accidental. 



Gnathias lepida (Cresson), 5, was found May 24, on the campus of the University of 

 Colorado, at flowers of Drymocallis. It had been captured on the flower by a grayish 

 Thomisid spider. 



Boinbomelecta fulvida (Cresson). Boulder, May 17, 1902 (S. A. Johnson); Virginia 

 Dale, June 19, 1901 (Colorado Exper. Station). 



Melecta miranda Fox. Denver, June 8, 1901 (S. A. Johnson); Salida, Oct. 8, 1898 

 (C. P. Gillette); Fort ColHns, July 8, 1904, bred from cells of Anthrophora occidentalis 

 by S. A. Johnson. 



Pseudopanurgus alhiops (Cresson). Glenwood Springs, Sept. 15, 1903 (C. P. 

 Gillette). 



Dieunomia xerophila Ckll., $> . Sterling, at sunflowers (S. A. Johnson). New to 

 Colorado; previously known from New Mexico. 



Prosopis basalts Smith, $ . Steamboat Springs, August 6, 1904, on flowers below 

 town along river, altitude 6,700 feet (S. A. Johnson). At the same time and place Mr. 

 Johnson also took Megachile manifesta Cresson. 



FLOWERING PLANTS 



NEW^ MEXICO WEEDS 



Few persons who have not paid especial attention to the matter realize the extent to 

 which our flora is invaded by aliens. This is especially the case, of course, in towns and 

 cultivated fields; and is best appreciated when one comes to examine land which has 

 been disturbed and yet not occupied by any crop. At Las Vegas, N. M., the campus of 

 the Normal School was thoroughly gone over, the surface being plowed and scraped, and 

 altered to make suitable levels and slopes, so that no sign of the original rather scanty 

 vegetation remained. During the last week of September, 1902, finding that the fallow 

 ground had produced a new and rather varied flora, I collected everything growing there, 

 finding the following species: 



(i) Aliens from Europe: Melilotus alba, Salsola tragus, Chenopodium album virlde, 

 Plantago major, Malva rolundijolia. Polygonum rayi, P. persicaria, Chatochloa viridis, 

 Hibiscus trioiium=g species. 



(2) Aliens from the South and Tropics: Ipomoea liederacea, Panicum colonum, 

 Amaranthus graecizans=^ t, species. 



