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30. 
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o4. 
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42. 
MISC. PUBLICATION 305, U. S. DEPT. OF AGRICULTURE 
(24) 
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(30) 
(5) 
(35) 
(4) 
Key to Nearctic Females of Tabanus—Continued 
Frons about three times as high as width at base; coxae yellow 
texanus Hine, p. 70. 
Frons more than three times as high as basal width; coxae 
FA) fh (ak POS Le ee, Dye ee Pe Pe longiusculus Hine, p. 71. 
Frons narrow, distinctly widened above__sackeni Fairchild, p. 72. 
Frons moderate in width, with parallel sides___________________ 
Second palpal segment distinctly swollen basally; median ab- 
dominal spots forming a distinct stripe, regularly widening 
on each: tersilesit.. -W 3s suas sagaxv Osten Sacken, p. 73. 
Second palpal segment not greatly swollen; median abdominal 
Spots! Slender. 0S ee ee ee eee 
Pale markings of abdomen yellowish brown, the sublateral spots 
distinctly touching hind margins 
sublongus, new species, p. 74. 
Pale markings of abdomen grayish, the sublateral spots small 
and separated from hind margins_longus Osten Sacken, p. 75. - 
Eye, in life, with two or more purple bands; median callus sub- 
quadrate; palpus not strongly swollen basally and not 
sharply pointed!=-5 232-5 Ue ie ee Se ee ee ee 
Eye unicolorous or with one purple band; median callus a 
slender line; palpus strongly swollen basally, and with apex 
CUE Cs os hs One les EE Le SE re ae ne We meee 
Third antennal segment broad, with a distinct angle above; 
(eastern part of the United States) _pumilus Macquart, p. 75. 
Third antennal segment narrow, with scarcely any angle above; 
(western part of the United States)_fratellus Whitney, p. 76 
Hye unicolorous; (from New Jersey north) 
sparus Whitney, p. 77. 
Eye with a single, diagonal, purple band; (from New Jersey 
SOUpD) tee 3 ee eee sparus subspecies milieri Whitney, p. 78. 
Wing with large brown maculations, these not confined to cross 
veins and furcation; lateral abdominal spots confined to 
posterior segments and often joined to median triangles 
venustus Osten Sacken, p. 78. 
Wing not so colored and abdominal spots otherwise_-____-_-_--__ 
Brown, elongate, the sublateral abdominal spots very faint; wing 
Suifused: with Prowl. 2-2-0 2. fee johnsoni Hine, p. 79. 
Black and white, the sublaterai abdominal spots distinct; wing 
not sulfused with brOwn2 22222). se ee ee 
Median and sublateral gray spots broadly confiuent along poste- 
CIOL MOU ees ee ee ees ee et 
Median and sublateral gray spots scarcely, if at all, joined along 
POSEETION Mar Oi 1555 -ee ee oe 2S oe ae ee eee 
Frons broad, the basal callus subquadrate___birdiei Whitney, p. 80. 
Frons rather narrow, the basal callus distinctly higher than 
Widest be ai Bw cymatophorus Osten Sacken, p. 80. 
Not more than 14 mm in length; hind tibial fringe black 
monoensis Hine, p. 81. 
Not less than 15 mm in length; hind tibial fringe white 
reinwardtii Wiedemann,, p. 82. 
Eye bare; no ocellar tubercle present________________________-_ 
Hye pilose, or, if bare, a distinct ocellar tubercle present_____~ 
Hither abdomen unicolorous or tergites with narrow posterior 
pollineses bands: Sos Fe es ee 
Neither abdomen unicolorous nor tergites with only narrow, 
posterior bands i sie2 se Pe ee SE Se ea Se 
Palpus reddish brown to white, or, if dark reddish, the body 
25 mm or more in length, with hyaline wing and dark costal 
CO} Seu EES = eH Ce se LeeLee tit se bee ate FCS AOS Le SEE a 
Palpus’dark*browni totblacks £2) 2P eet ere ae ee 
Furcation without a distinct brown spot; (costal cell colored or 
Nya line) 22s ee Ob, ME Re ts Se ee eee 
Fureation with brown spot; (costal cellsyellow) 23 == 
Medium sized ; costal cell hyaline______ rufofrater Walker, p. 101. 
Large: costal cell yellow or browne === 
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