NO. 1806. BEE^ IN THE NATIONAL MUSEUM. l.—COCKERELL. 651 



NOMADA LIMATA Cresson. 



Brownsville, Texas, November 24, 1909 (F. C. Pratt). A species 

 heretofore known from tropical Mexico only. N. 'pampicola Holm- 

 berg, which I have from Paraguay (Schrottky), is closely allied. 



NOMADA VIERECKI Cockerell. 



Ladonia, Texas, May 25, 1904, at flowers of Rudheckia (Bishopp). 

 Previously known only from New Mexico and the State of Chihuahua, 

 Mexico. 



NOMADA GARCIANA Cockerell. 



This species was described from a specimen taken in the Mesilla 

 Valley, New Mexico. The specimens from Texas have a slightly 

 different aspect, but after careful comparison I can not find any 

 characters on which to separate another species. The insect looks 

 like a small N. texana, but the mesothorax is shining, with well 

 separated punctures. The Texan variety may be distinguished by 

 the yellow markings of the head and thorax (varying in depth of 

 color), those of the New Mexico type being ivory color. 



Falfurrias, Texas, at flowers of Helianthus, May 18, 1907 (A. C. 

 Morgan); Runge, Texas, September 20, 1906, both sexes (J. C. 

 Crawford); Calvert, Texas, April 5 and 10 (C. R. Jones); Eagle Pass, 

 Texas, March 30, 1908 (Jones and Pratt). 



NOMADA PUTNAM! Cresson. 



Like a large N. garciana, the punctures on mesthorax well sepa- 

 rated; the markings of head and thorax yellower. Laredo, Texas, at 

 flowers of Prosopis glandulosa, June 5, 1907 (R. A. Cushman); 

 Ladonia, Texas, at Rudheckia, species. May 25, 1904 (Bishopp). 

 N. putnami was described from Utah; the insect from Texas may 

 prove to be distinct, but as it agrees with Cresson's description I can 

 only refer it to his species. 



NOMADA RIVALIS Cresson. 



California, one male (Morrison). This species is very close to the 

 Rocky Mountain N. ornithica Cockerell; they may be separated as 

 follows : 



Larger; b. n. going a considerable distance basad of t. m.; second r. n. received about 

 middle of third s. m.; black bands from antennae half way down sides of clypeus; 

 scutellum with two yellow spots; postscutellum black; hind femora ordinary, .rivalis. 



Smaller, but variable in size; 6. n. meeting t. m., sometimes a little on the basad side; 

 second r. n. received much beyond middle of third s. m.; no black bands extend- 

 ing down from antennae; yellow of scutellum not divided into spots; postscutellum 

 with a yellow band ; hind femora stout ornithica. 



NOMADA CROTCHIl Cresson. 



Two females, Los Angeles County, California, April (Coquillett). 



