26 Myron Harmon Szvenk 



Posterior coxae with long stout pale spines; pygidium wholly or largely 

 yellow, truncate with a median tooth but no lateral teeth; bands 

 on tergites 2-5 deeply emarginate I 



I. Legs red; a narrowly interrupted red band on vertex and upper 

 cheeks; tubercles, lines on mesoscutum and mesoscutellum and 

 spots on tegulae, red; tergites i-S with yellow bands, deeply 

 emarginate laterally on 2-5 and nearly cutting through on i, those 

 on 1-3 margined posteriorly with reddish, 6 with lateral yellow 

 spots ; pygidium yellow except at base, sometimes more or less 

 suffused with reddish, medially carinate and with distinct emargi- 

 nations on either side of the median apical tooth; lo-ii mm. .sayi 



I. Legs yellow and black; a mark behind each eye, tubercles, spots on 

 anterior border of mesoscutum, lines on mesoscutellum, and 

 tegulae exteriorly, pale yellow ; tergites 1-6 with clear pale yellow 

 bands, deeply emarginate laterally on 2-5 and cutting through on 

 I to form three spots ; pygidium yellow, broadly truncate, not 

 carinate nor with distinct emarginations on the sides of the 

 median apical tooth ; 9 mm ulkei 



Dianthidium (Dianthidium) jugatorium (Say). 



1824. Mcgachile jugatoria Say, Long's Second Expedition, II, App., 



pp. 352-353, $• 

 1854. Anthidium jugatorium Smith, Cat. Hym. Brit. Mus., II, p. 214. 

 1864. Anthidium jugatorium Cresson, Proc. Ent. Soc. Phil., II, p. 



380, $. 

 1904. Dianthidium jugatorium Cockerell, Entomological News, XV, 



P-84. 

 1909. Anthidium jugatorium Graenicher, Bull. Wisconsin Nat. Hist. 



Soc, VII, pp. 63 and 67. 

 191 1. Dianthidium jugatorium Graenicher, Bull. Milwaukee Pub. Mus., 



I, p. 244. 



This species was described by Say in the female sex only from 

 specimens from " Missouri." Graenicher has recognized it from 

 Wisconsin, where he found both sexes on Hclianthus stniniosus 

 and Heli apsis scabra, the females collecting pollen. Before the 

 writer is a series of eight males collected at Weeping Water and 

 Union, Cass county, Nebraska, July 20 and 21, 1906, at flowers of 

 Helianthus divaricatns and Kuhnistera Candida (H. S. Smith). 

 The male sex, which has never been described, may be recog- 

 nized by the characters given in the table. The allotype is from 

 Weeping Water, July 20, 1906, on Helianthus divaricatns. 



26 



