1 8 Myron Harmon Sivenk 



tensis Swenk, but can hardly be the J* of that species because of 

 the largely creamy legs, creamy tegulae, complete bands on 

 tergites 1-3, spotted mesopleura, etc. Close to A^. aqiiilarum 

 Ckll. J*, but much larger and with much more extended pale 

 markings. Differs from N. cockcrclU Graenicher (^, in the com- 

 plete bands on tergites 1-6 (no band on tergite i and those on 

 2-4 interrupted in cockerelli) , spots on coxae (lacking in cocker- 

 elli), larger lateral face marks, wholly pale tegulae, whitish dots 

 on metanotum, whitish postocular line and pleural spots, basally 

 clear wings, etc. A^^. snozvi Cresson J*, differs at once in the 

 mostly red legs and yellow abdominal bands. A'^. verecnnda 

 Cresson (^, also differs in the yellow abdominal bands and other 

 characters. 



Nomada (Holonomada) dawsoni Swenk. 



I am greatly surprised on re-examining the type to find that 

 this supposed Nomada is really a specimen of Aphilanthops close 

 to frigidus F. Smith, but with the ordinarily bright yellow mark- 

 ings very pale yellow or cream color. The superficial resem- 

 blance of .this specimen in color marks to Holonomada spp., of 

 the preceding group, is astonishing. 



Nomada (Gnathias) bella Cresson. 



Three females from Germantown, Pennsylvania, May 6 and 

 June 12, 1905, (H. L. Viereck), are representative of true A^. 

 bella $ (=N. maculata Cresson), agreeing best with Cresson's 

 var. h but having the spots on tergite 5 quite separated. A study 

 of this series shows that the two females from Ute creek, Costilla 

 county, Colorado, and the female from Detroit, Minnesota, previ- 

 ously tentatively referred to N. bella (antea, XII, p, 92) cannot 

 really belong there; the former seems to be the previously un- 

 known 5 of N. schwarzi Ckll. (the supposed 5 of schwarzi de- 

 scribed with the J* being lepida 5), and the latter the closely 

 related species or variety of schwarzi here described as N. riibi. 

 The Colorado female (June 27, 1907, L. Bruner) may be con- 

 sidered the allotype oi N. schzvarzi. 



I have before me a large series of Gnathias from North Dakota 



172 



