1903.] NATURAL SCIENCES OP PHILADELPHIA. 601 



antenna long, third joint scarcoly shorter than fo-th to^.h. ferni- 

 r^inous conspicuously punctured; wings dusky, especially at tips, 

 ! ori'subnwginal c'ell scarcely broader above than third ; basal nerv- 

 ure a on. distance basad of transverso-medial ; nervures very daik 

 stigi^^a small, ferruginous; first ventral segment of abdomen .ith a 

 longitudinal black patch. . 



^a&.-Nevada (no details known). One m Coll. Acad. ^at. bci. 



Phila. 



Nomada bella, Cresson. ^ , , • i nno -.+ o+or1 +lTat AT 



,V. bellu was based on the male; Robertson in 1902 stated that JV^ 



,naculatn was the female of the same species. So «- - ^ ^"^ *'^„*° 



make out this is correct; and Mr. \iereck, after examining Ciessons 



ypS m t s: "I think bellu is very likely the other sex of maculaU,. 



AsThave indicated iu the tabic, the species presents some variation. 



thich is partly geographical; but I ^ .""'^VT'lt f urious thl; 

 guish more than one species in the material studied. It i> <^"™"= « ^* 

 ?he females from the northwest, where one expects melamsm, aie pa er 

 than tTose from the northeastern States. A', bella flies from the latte 

 trt ofTp il through May, but apparently is over by June in most 

 Calil I.; the s^ies before me the males (^;««. — ^e^™.^ 

 Philadelphia, Pa. (Viereck); Riverton, N. J; (^-ereck) %ack N. Y^ 

 (Zabriskie)- New Hampshire (Baker coUect.on, number \f<^>'^°^^ 

 .;ttv Wi . (Baker); Michigan (Gillette); and Baldwin Kans. (,I C 

 Bridwel) The females (maculata, Cresson) are from Frank inviUe, 

 Pa Tfox • Lehigh Gap, Pa. (Viereck); Indiana (Baker collection, 

 „v,;r S76 1 878)- New Hampshire (Baker collection); Glenora, 

 TiSrCo 2ia\w?ckham) ; Corv^his. Oreg. (Cordley) : and Olymp^^^ 



Xh (Kincaid). It seems remarkable that a species found in In- 

 Uana and Kansas should fail to occur in Mr. Robertson's dismct u 

 mnoist but he has never met with it. This '-* " "f "*- ^'^j ^ J 

 of error in making broad statements about drstribution I find 1 

 have a ingle male collected by Prof. Kincaid at Seattle, Wash., June 

 95 1897 This is much later than any of the dates on eastern speci- 

 mens, but the insect appears to be a genuine bella. 



"Tim^^uZlo.ist, p. 156) I commented on the geograp ical 

 difference in size in the so-called .V. maculata. and just be ore Robert- 

 onrrecent paper appeared I ha<l concluded that the small form ought 

 to be separated. I am therefore very wiUing to recognize N euneata 

 Is val d It does not always live apart from N. belU (maculata). but 

 invades the territory of the latter in Kansas and Pennsylvania. N. 



