ceropalinae: tribe ceropalini 239 



2. Frons opaque, with dense small punctures and without noticeable larger 



punctures; male with second to fourth segments of fore and middle tarsi 

 not unusuallj' short (second segment of middle tarsus about 2.0 as long 

 as wide); claws of middle tarsus of male symmetric, not specialized; hind 

 femur dark or fulvous, usually with the apex yellow, maculata group 



(subspecies of maculata) 3 



Frons subshining, with minute punctures and also with scattered larger 

 punctures; male with second to fourth segments of fore and middle tarsi 

 very short and broad (second segment of middle tarsus about 1.0 as long 

 as wide); claws of middle tarsus of male asymmetric, specialized; hind 

 femur fulvous, fulvipes group 7 



3. Third tergite entirely blackish 4 



Third tergite with an apical yellow or whitish band 5 



4. Femora fulvous, often infuscate at the base and apex; range: Europe. 



la. maculata maculata (Fabricius) 



Femora blackish, in the male with the apex yellow; range: Sierra Nevada of 



California lb. maculata caenosa, new subspecies 



5. Apical yellow mark on hind femur occupying more than the apical third, at 



least as disconnected spots; face of female entirely yellow; yellow apical 

 bands of tergites broad; range: much of the Pacific States. 



le. maculata stretchii Fox 



Apical yellow mark on hind femur occupying less than the apical third, or 



absent; face of female with a median black area; yellow apical bands of 



tergites relatively narrow 6 



6. Front face of hind femur clear rufous, infuscate basally and usually with 



a yellow apical spot; range: Minnesota and Manitoba to Alberta, sporadi- 

 cally east to Massachusetts . . Ic. maculata rhodomcrus, new subspecies 

 Front face of hind femur mostly brownish or blackish; range: most of the 

 Nearctic Region Id. maculata fraterna Smith 



7. Larger punctures on frons small and weak, separated from one another by 



an average of about 4.0 their diameter; larger punctures on mesoscutum 

 separated from one another by an average of about 1.5 their diameter; 

 male hind coxa with a basal ventral strongly projecting flange that sub- 

 tends a strongly excavated portion of the coxa; male subgenital plate pro- 

 duced and in profile swollen apically 14. fulvipes Cresson 



Larger punctures on frons of moderate size, separated from one another by 

 an average of about 2.0 their diameter; larger punctures on mesoscutum 

 separated from one another by an average of about 0.7 their diameter; 

 male hind coxa unspecialized or with an internal overhanging ridge on its 

 basal half; male subgenital plate triangular in profile, not so swollen 

 apically 3 



8. Front and middle femora rufous with yellow markings; male hind coxa not 



specialized; male subgenital plate in profile not swollen apically; labrum 



of female entirely or mostly yellow 12. brevicornis Patton 



Front and middle femora blackish or dark brown, with yellow markings; 

 male hind coxa with an internal overhanging ridge on its basal half; male 

 subgenital plate triangular, in profile somewhat swollen apically; labrum 

 of female black 13. neomexicana Rohwer 



9. Mesoscutum and top of pronotum with short inconspicuous hairs; second 



flagellar segment 1.8 to 2.2 as long as wide; female subgenital plate in 

 profile with a projecting apical part, apex of which is evenly rounded; 



forewing 5.5 to 16 mm. long, robinsonii group 10 



Mesoscutum and top of pronotum with long, conspicuous, recHned hairs; 

 second flagellar segment 1.2 to 1.6 as long as wide; female subgenital plate 



