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Myroii Harmon Szvoik 



Allotype. — Lincoln. Nebraska, August 27, 19CX), on Helianthus 

 aim II us (J. C. Crawford), $. 



Nomada (Nomada) taraxacella Cockerell. 



1903. Nomada ultima taraxacella Cockerell, Proc. Acad. Nat. Sci. 



Phil., pp 589-90, 2. 

 1905. Nomada taraxacella Cockerel), Bulletin 94, Colorado Exp. Sta., 



p. 74, ?■ 

 191 1. Nomada taraxacella Cockerell, Proc. U. S. Nat. Mus., XLI, p. 

 238. 9 (part), not <^. 



A series of two females and four males collected in May in 

 Sioux county, Nebraska, by L. Bruner, are referable to A^". 

 fara.vacclla Cockerell. A fiftb male before the writer is from 

 Pullman, Washington, collected May 14, 1898, and is not different 

 in any way from the Nebraska series, although this is getting 

 pretty near to the range of A^. nlt'wia, and the specimen may 

 really be the male of that alleged species. One of the two 

 females is perfectly typical of taraxacella, agreeing with Cock- 

 erell's diagnosis in every detail and identical with an autotype in 

 the U. S. National Museum, but the other is aberrant in lacking 

 the abdominal spots, though the short third antennal joint, yellow 

 inner orbits, etc., show that it is correctly referable to that species. 

 As was originally considered by Cockerell, probably taraxacella 

 and ultima are but variations of one species, the only difference 

 between them being the lack of the three black mesoscutal stripes 

 in taraxacella, but this point can be definitely determined only 

 when a series is available for study. Both are closely related to 

 N. erythraea D. T., but that form seems distinct in its erect black 

 hair on the inner side of the hind basitarsi. Thus considered, 

 A^. taraxacella has a range from New Mexico, Colorado and 

 western Nebraska west to Washington. 



The series of four females and eight males from Colorado, 

 bearing Baker's No. 2075 and now in the U. S. National Museum, 

 and all referred to N. taraxacella by Cockerell {Proc. U. S. 

 National Museum, XLI, p. 238), is composite, only one of the 

 females being really taraxacella (the one mentioned as 

 "normal"), the other two specimens (one female is missing) 

 labelled taraxacella var. by Cockerell representing a distinct 



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