34 Myron Harmon Szvenk 



ties, western Arizona, i,ooo feet, August (F. H. Snow, No. 



989), ?. 



Allotype. — Type locality, September (F. H. Snow, No. 9S8), ^. 



Paratypc. — Tucson, Arizona (F. H. Snow), i J*. 



Because of the yellow and black legs and the yellow propodeal 

 spots this species is obviously very closely allied to N . suavis 

 Cress., and A^. seinisuavis Ckll. It is somewhat smaller than 

 either and is chiefly distinguishable from both by its very pale 

 yellow ornaments and maculations, these being bright lemon- 

 yellow in the species mentioned. From N. suavis the $ further 

 differs in its dark clypeus, supraclypeus, lower corners of face 

 and labrum, its reduced postorbital line, the deeply anteriorly 

 emarginate band on tergite 5, the maculations of the sternum 

 confined to sternites 3 and 4, and the more finely and densely 

 punctured mesoscutum; the J* differs in the distinctly notched 

 apex and lack of black in the supraclypeal suture. From N. 

 semisuavis ^ that sex of pallidelutca apparently differs in the 

 scape not being swollen and the second submarginal cell being 

 rather broad as well as in its size and coloration ; however it is 

 possible that more specimens will reduce the status of pallidelutea 

 to a subspecies of seinisuavis, the paratype showing evidence of 

 intergradation in its larger size over the type. The two sexes of 

 pallidelutea represent the " two new species " recorded from Bill 

 Williams Fork in Trans. Kansas Acad. Sci., XX, part 2, p. 12, on 

 the determination of Mr. H. L. Viereck. 



Viereckella pilosula (Cresson). 



A series of seven females and four males, from Fargo, North 

 Dakota, of which four females (5810-13) and all of the males 

 (5814-17) were collected July 20, 1913, on Lactuca pulchella 

 (O. A. Stevens), and the other three females (5957, 5958, 5959) 

 on the same flower July 27, 191 3, by the same collector. With 

 the former lot was taken Macropis morsei, of which I have 

 examined two pairs (5818-5819 and 5834-5835), on which it is 

 probably parasitic. 



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