1942] 
Nearctic Tabaninx 
39 
of, rather than in spite of, Osten Sacken’s remarks (pp. xv 
and 229) on the Wiedemann types, I am inclined to agree 
that this must be the original specimen. There is some 
satisfaction in returning the species to the excellent dipterist 
by whom it was first recognized, and thus obviating use of 
another of the inadequately described Walkerian names 
which Osten Sacken considered so distasteful. 
The synonomy therefore includes costalis Wied. (not 
Lichtenstein), vicarius Walk, (partim), baltimorensis 
Macq., and floridanus Szil. 
Structurally indistinguishable from the species are nigro- 
vittatus Macq., fuscico status Hine, and mularis Stone, so 
that differentiation depends on tinctorial characters — chief- 
ly the intensity of yellowing of the callosity, palpi, face, 
pleurae and costal cells, and differences in the abdominal 
pattern. Variations in these characters make some speci- 
mens difficult to assign, and the situation is somewhat ana- 
logous to the lineola complex without the structural dif- 
ferences in the males for support of separation. Variation 
in distribution of black and faint to more prominent sub- 
lateral red on the abdomen of certain specimens suggests 
that mularis may be a melanistic phase of quinquevittatus. 
SUMMARY 
The Tabanus lineola complex in Nearctic America is dis- 
cussed, and the following forms recognized: lineola Fabr. 
s. str. and subsp. scutellaris Wlk., T. vittiger subspp. 
schwardti nov. and nippontucki nov., and T. amplifrons 
Krob. For an adequate conception of these, associated males 
were essential. T. quinquevittatus Wied. is considered the 
prior name for T. costalis Wied. (not Licht.) and T. vicarius 
Wlk., thus removing it from the lineola complex. 
My special thanks are due Drs. G. B. Fairchild and Alan 
Stone for helpful suggestions and loan of pertinent material, 
and to Drs. J. H. Beamer, T. H. G. Aitken, Walter Stanley, 
Ada L. Oleson, and many others for additional specimens. 
