62. 
63. 
67. 
68. 
69. 
70. 
71. 
72. 
73. 
74. 
75. 
76. 
17. 
78. 
(61) 
(58) 
HORSEFLIES OF THE SUBFAMILY TABANINAE 
Key to Nearctic Males of Tabanus—Continued 
Side of abdomen above and venter largely orange brown 
erythraeus (Bigot), p. d8. 
Side of abdomen above black, venter gray 
fairchildi, new species, p. 63. 
Allfemora’ pale ‘reddish! 23 2) aoe orbicallus Philip, p. 59. 
At least fore femur dark brown to blackK_--_--_-______-_______ 
Antenna orange except for black annulate portion; basal portion 
VERY “SUOU LE aL eh 2 Des ae eee 2 Bee euryceras Philip, p. 65. 
Antenna not 'so ‘colored -or-formed=— 2-0 ee 
Hind tribial fringe white______________ intensivus Townsend, p. 60. 
Eb nattibialtringe: black... NN ee ey Eee eS 
Venter with abundant black hair medianly 
gilanus Townsend, p. 61. 
Venter with no black hair medianly anterior to apex of fifth 
SOS EI OW yb a Ee oe Sh Es Sipe oh Me ee a laticeps Hine, p. 62. 
Rather small, blackish, the frontal triangle gray, protuberant; 
genae black, subshiny; wing with a brown cloud in stigmal 
CPs Cee ere 2 EE POOR hinei Johnson, p. 124. 
Black species, with tergites 1-3 and sternites 14 mostly orange, 
the remainder entirely black_-________ cinctus Fabricius, p. 125. 
ADOOMEeIMenOt SO COlored 42.2 2s Ve ee 
Entirely black including palpus; frontal triangle, clypeus, and 
genie shiny Dlagk. 2 80ls) she cs procyon Osten Sacken, p. 127. 
IN OPeeipre Lyrae Chea see ee a ee SE 
Cross veins and fureation distinctly margined with dark brown; 
(sides of tergites 1-4 largely orange and usually with oblique 
yellow spots superimposed )___lasiophthalmus Macquart, p. 128. 
Cross veins and fureation not both distinctly margined with dark 
[Ts @yyiysliterr ate eee meal Simaeam AAI Ah as Lk RATNER PN ES 
Abdomen broadly orange brown laterally, the median black area 
usually constricted on tergite 8; sublateral pale spots not 
EMD IASON GT UES seen Sa NE id PR ee des 
Abdomen not broadly orange laterally; if paler laterally, the 
median dark area rather broad and not constricted on tergite 
3; sublateral pale spots, if present, distinct and with little 
if any orange brown surrounding them__-_—_-__________-__= 
Under 15 mm in length; pale median spots on central black area 
forming a slender, usually continuous line; a large, quadrate, 
black spot on second sternite reaching posterior margin; 
(EAH AIMTC HK COASE hte eh iia A ee daeckei Hine, p. 135. 
INotaeTecinzs entirely with’ this: 2-22-32 SE 
Small, dark species, the orange on sides of abdomen confined to 
first three tergites and leaving a broad, median, black area; 
palpus very small, the second segment about one-fourth length 
OPPRODOSCISH hie hls wa at SS Ti longiglossus Philip, p. 144. 
Notagreeings entirely, -with? this=222 0 be ee a 
Third antennal segment largely orange, this color extending more 
.than half length of basal portion along lower margin__________ 
Third antennal segment black except extreme base of basal portion_ 
Large and small facets of eye somewhat differentiated, in dried 
specimens a yellowish band at lower margin of area of larger 
TES Se LE eh SS trepidus MeDunnough, p. 181. 
Facets searcely differentiated, the eye without a yellowish band__ 
Second palpal segment stout, whitish or pale yellowish__-_-_____~ 
Second palpal segment moderately slender to stout, yellowish brown_ 
First sternite entirely orange or orange with a small, median, black 
SST fe ana ese Bs ae ee a le epistates Osten Sacken, p. 136. 
First sternite entirely black or with a little orange sublaterally at 
OOS TS TAO TTA AIM ie Os aS oseton sl PALIT Ea) EE AES EVO SAP 
Claws of fore tarsus subequal; a faint spot at furcation 
metabolus McDunnough, p. 151. 
Outer claw of fore tarsus distinctly longer than inner claw; no 
Spo curcations 222 _ O24 40 JOR nudus MecDunnough, p. 1388. 
ol 
64 
65 
66 
68 
69 
70 
71 
72 
85 
13 
(ec: 
15 
83 
76 
17 
79 
78 
