Studies of North .Uucrican Bees 29 



bright brownislj red, joint 3 four-sevenths as long as 4. Face feebly 

 punctured, minutely striate, vertex and thorax very coarsely and densely 

 punctured. Tubercles pale yellowish, the anterior half with a large 

 black spot. Tegulae red. Wings suhhyaline, narrowly darkened apically, 

 a clear area beyond submarginals, nervures black, stigma very dark brown. 

 Basal nervure much basad of transverso-medial, the third submarginal 

 but a shade narrower above than the second. Mesoscutellum bilobate, 

 each lobe with a small red spot. Base of enclosure of propodeum finely 

 irregularly wrinkled. Legs yellowish red and black, the latter color 

 involving the coxae, posterior face of first four trochanters and all of 

 posterior trochanters, large areas on posterior face of first four femora and 

 tibiae and all of posterior femora and tibiae except the knees and the 

 apices of the tibiae. Hair on inner side of hind basitarsi pale yellowish 

 gray. Vertex, occiput and thorax above w'ith rather long, copious, 

 erect, pale ochreous hair, the cheeks, pleura, trochanters and femora 

 and sides of propodeum with similar white hair. Abdominal tergite 

 I black with a broad obscurely reddish band which is so deeply 

 squarely incised medially as to leave only a very narrow connecting 

 line and each broad lateral portion bears a median suboval black 

 spot ; yellow bands of tergitcs 2-5 broadly and deeply medially emarg- 

 inate on anterior margin and narrowly interrupted medially by a red- 

 dish stain, that on 2 with a small indentation anteriorly on each 

 extreme side, those on 3-5 more or less distinctly emarginate on middle 

 of posterior margins of each lateral half, the emargination cutting through 

 on 5 and isolating a lateral spot, 6 with an entire transverse spot. Apex 

 broad, deeply bifid at tip. Venter of abdomen mostly black, sternite i 

 reddish brown except for a median cordate black mark, sternites 2-4 

 with curved brownish marks on the disk. 



Type. — Lincoln, Nebraska, April 18, 1903, on Ribes gracile 

 (AI.H. Swenk), ^. 



This species agrees very closely with the description of A^ 

 pallidella Ckll., but that species has the basal nervin-e interstitial 

 with the transverso-medial nervure, though on the basad side, 

 the third sulMiiarginal cell greatly narrowed above, tergite i 

 with a broadly interrupted yellow band, tergites 2-6 with the 

 yellow bands complete, etc. It is very close, also, to A^. ruido- 

 sensis Ckll., but compared with the type of that species in the 

 U. S. National Museum (Cat. No. 13 175) it differs in having the 

 apex strongly notched (very slightly so in ruidosensis) , the basal 

 nervure much basad of transverso-medial (interstitial in ruido- 

 sensis), and the legs yellowish red to brownish with much more 



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