46 
MISC. PUBLICATION 305, U. S. DEPT. OF AGRICULTURE 
118. 
119. 
120 
. (116) 
121, 
122. 
1238. 
124. 
125. 
126. 
(120) 
127. 
128. 
129. 
(127) 
130. 
131. 
132 
. (180) 
133. 
134. 
Key to Nearctic Females of Tabanus—Continued 
Hind tibia dark reddish brown to black, with black hair 
sexrfasciatus Hine, p. 141. 
Hind tibia reddish yellow or yellow, with concolorous hair____ 119 
Abdominal bands broad, formed by yellow hair on a broad 
border of yellow pollen; prescutal lobe reddish 
zonalis Kirby, p. 142. 
Abdominal bands consisting of a narrow fringe of pale yellow 
hair; prescutal lobe black__---_-_~ aequetinctus Becker, p. 148. 
Second palpal segment slender, scarcely thickened basally_____- 121 
Second palpal segment not particularly slender, the base always 
rather distinctly’ thickened 22 25-302 2)] 2h 126 
Subeallus denuded; basal callus distinctly transverse; proboscis 
elongate; sides of abdomen orange 
longiglossus Philip, p. 144. 
Subeallus pollinose; basal callus subquadrate; proboscis of mod- 
erate length or, if elongate, sides of abdomen not orange. 122 
Femora, except base of hind femur, orange brown 
minusculus Hine, p. 145. 
HMemora: (Dlaek 232s not he eee ee ee ee 123 
Proboscis elongate, the palpus not reaching base of labellae 
hearlei Philip, p. 146. 
Proboscis not elongate, the palpus reaching beyond base of 
labellae. 2.2 22 bof at he pee Bee Be Ee ee 124 
Prescutal lobe black; base of third antennal segment narrow; 
hair of palpus rather long’ and ‘uneven_Lei2U ss Fo 125 
Prescutal lobe reddish; third antennal segment not very narrow; 
hair-of palpus short: 22 = se norte typhus Whitney, p. 148. 
Second palpal segment yellow brown, with black hair; third 
antennal segment with some orange basally 
astutus Osten Sacken, p. 146. 
Second palpal segment creamy white, with white hair basally; 
third antennal segment black____boreus, new species, p. 147. 
Abdomen black, with a median row of conspicuous white tri- 
angles and no sublateral spots__trispilus Wiedemann, p. 149. 
Abdomen--not -So - COlOre G22 ee eae 127 
Furcation with a distinct brown spot; third antennal segment 
rather stout, the dorsal excision rather distinct; (body 
SSE OUUEH) act a SS ee AN De a ee 128 
Fureation without a distinct spot, or third antennal segment 
elongate and slender, with scarcely any excision above_____ 129 
Subeallus -pollinose. 22 illotus Osten Sacken, p. 150. 
Subcallus denuded________-_____ metabolus MceDunnough, p. 151. 
Subcallus pollinose, with some black pile laterally; black species, 
the lateral abdominal spots evanescent 
laniferus McDunnough, p. 151. 
Pile absent from subcallus laterally, or, if present, the lateral 
abdominal spots distinct or subcallus not pollinose___--_- 130 
Frons very broad, with parallel sides; frontal callus transverse, 
twice as broad as median height; (prescutal lobe black)_--- 131 
Frons moderate in width; frontal callus subquadrate____------ 132 
Subeallus denuded; hair of palpus white; pale, sublateral, ab- 
dominal spots lacking___________ oklahomensis Stone, p. 140. 
Subcallus pollinose; hair of palpus black; pale sublateral spots 
present. 4: TS a Fa AES Pe aoe 8 laticallus Philip, p. 182. 
Subcallus -pollinosess 25 = 5 tT ets 4 ae ee Petes et ee 138 
Prescutal Vobe Diack = st dt 5 ON Pe ae eS 134 
Prescutal lobe'+yellowish’ “brown 22 oe ea SRS 135 
Second tergite laterally partially black 
rhombicus Osten Sacken, p. 153. 
Second tergite laterally entirely orange in ground color 
rhombicus var. rupestris McDunnough, p. 154. 
135. (133) Femora partially or wholly yellow brown___--__.--------_---~- 136 
Femora ‘uniformly ‘dark, “with gray pollen—22222>5 2022 137 
