44 Myron Harmon Szvenk 



one has tergite 4 perfectly immaculate while the other has small 

 but distinct yellow spots on this tergite, indicating that the differ- 

 ence is simply one of individual and not geographical variation. 

 A female from Manhattan, Kansas, collected May 10, 1912, on 

 Ceanothus oi'atns by R. W. Dawson, has a broad yellow band on 

 tergite 5, as in typical crcssonii, but the propodeum is black with 

 merely two red stripes down each side of the middle. All this 

 indicates considerable variation in the species. 



Nomada (Nomada) minuta n. sp. 



$. Length 5 mm. Red ; a stain between points of insertion of antennae, 

 about ocelli and on cheeks behind, a narrow median line on mesoscutum, 

 depressed sides of mesoscutelhim and metanotum, metapleural sutures, 

 propleura, small spots on sides of mesosternum, and hind basitarsi, black 

 or blackish. Antennae red, the scape suffused with yellow in front, joint 

 3 about three-fifths as long as 4, which is five-sevenths as long as 12. 

 ]\Iesoscutum rugose punctate. Mesoscutellum elevated but very feebly 

 bilobed. Face, cheeks, notum, pleura, sides of propodeum, legs and tip 

 of abdomen with very thin, erect, pale hair, longest on propodeum, pleura 

 and cheeks. Wings hyaline, darkened apically, nervures and stigma dark 

 brown, basal nervure considerably basad of transverso-medial nervure, 

 second and third submarginal cells narrowed slightly over one half above, 

 the second slightly the narrower. Outer face of hind tibiae smoothish. 

 scarcely tuberculate even when viewed in profile, no obvious setae at 

 apex. Abdomen immaculate red except for a small yellow spot on each 

 side of tergite 2. 



Type. — Bad Lands at mouth of Monroe canyon, Sioux county, 

 Nebraska, May 28, 1901, on Honialohus teneUiis (L. Bruner), 5. 



Because of its small size this species seems at once referable to 

 the parva group. It is apparently very close to N. infantula 

 Ckll., but may be distinguished by the entirely red propodeum, 

 smaller black areas on mesosternum, no black at base of abdomen 

 or infuscation at apex of third abdominal tergite, and much 

 broader third submarginal cell. It may be separated from typical 

 A'', parva Robertson, by its paler red color, feebly double spotted 

 second abdominal tergite and otherwise immaculate abdomen, and 

 the basal nervure much basad of transverso-medial ; but in the 

 U. S. National Museum there are three females from Georgia 

 labeled "parva var." which have no spotting on the abdomen, 

 and an Illinois female received from Robertson and determined 



44 



