32 Myron Harmon Swenk 



Dianthidium (Dianthidium) perpictum coloradense n. subsp. 



$. Length lo mm. Stout, black ; clypeus except a large trapezoidal basal 

 area, lateral face marks extending rather broadly nearly to summit of eyes, 

 short lines behind eyes above, large L-shaped marks on antero-lateral mar- 

 gins of mesoscutum which extend inward one-third across anterior margin 

 of mesoscutum and caudad along lateral margin to axillae, small spots on 

 tubercles, spots on axillae, a narrowly medially interrupted band on meso- 

 scutellum, lines on femora beneath, knees, short stripes on the outer face 

 of first four tibiae and bands on abdominal tergites i-S, which are rather 

 broadly interrupted on i and 2, narrowly interrupted on 3, complete but 

 medially incised anteriorly on 4 and S and including all of 6, yellow, 

 Tegulae red. Legs, except yellow markings above mentioned, and black 

 coxae, trochanters and femora, red. Head strongly but not densely punc- 

 tured, mesoscutum shallowly subcancellately punctured, abdomen shallowly 

 and rather closely punctured, the apical rims of tergites 1-5 reflexed. 

 Wings fuliginous, nervures and stigma black. Pubescence very sparse and 

 thin, all whitish. Ventral scopa white. 



Type. — Colorado Springs, Colorado, $. 



This form is larger than typical D. perpictum, and further dif- 

 fers in the clear red tibiae and tarsi (which are only faintly suf- 

 fused with blackish on last four tibiae behind), more extensively 

 yellow clypeus and yellow-spotted axillae ; possibly it may prove to 

 be distinct. It is too large for D. jngatorium (Say) or the female 

 of D. lepidum (Cresson). 



Subgenus Anthidiellum Cockerell, 1904 



KEY TO THE NEBRASKA SPECIES 



Female 



Abdominal tergite i with large spots on extreme sides, 2 with a complete 

 or very narrowly interrupted and posteriorly deeply emarginate band, 

 4-6 each with two more or less exteriorly emarginate discal spots, yellow ; 

 a triangular mark on each side of face, a transverse band across hind 

 margin of vertex, two oblong spots on anterior edge of mesoscutum, 

 tubercles, spot on tegulae, narrow post-tegular line, usually small spots 

 on the axillae and always two large spots on the mesoscutellum, also 

 yellow; apical half of tergite 6 medially carinate; tibiae and tarsi wholly 

 red ; 8 mm boreaJe 



Male 



Abdominal tergites 6 and 7 medially carinate, 7 broadly bilobed on apical 

 margin and with its carina ending in a tubercle; face below antennae 



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