44 
89. 
90. 
91. 
93. 
94. 
100, 
101. 
102. 
103. 
TOF: 
. (87) 
(38) 
. (94) 
(98) 
MISC. PUBLICATION 305, U. S. DEPT. OF AGRICULTURE 
Key to Nearctic Females of Tabanus—Continued 
Palpus, pleura, and costal cell deeply yellow 
vicarius Walker, p. 117. 
Palpus white, pleura grayish, costal cell variable______________ 
Frons about two and one-half times as high as wide; a very 
small, slender species________----- cayensis Fairchild, p. 119. 
Frons three or more times as high as wide; larger and not so 
SMenGerse: 4st 1 Beye Tee cot Sd Ee pened ee eee ek ee 
Costal cell strongly infuscated ; frontal callus brown 
fuscicostatus Hine, p. 119. 
Costal cell not strongly yellow, or, if so, frontal callus black____~ 
Abdomen largely yellow brown lateraily; costal cell usually 
weakly colored. -==-- =" 2 nigrovittatus Macquart, p. 120. 
Abdomen black laterally, the lateral spots evanescent; costal 
cell usually strongly brownish yellow__mularis Stone, p. 121. 
Scutellum entirely black; median callus a narrow, rather elon- 
pate dimen shel eA ee aS eee lineola Fabricius, p. 122. 
Scutellum reddish at tip; median callus short and slightly 
broadened 2. se lineola var. scutellaris Walker, p. 123. 
Abdomen with a parallel-sided, median, pale stripe; no ocellar 
PUDCI ClO 8 Se ae i See truquii Bellardi, p. 125. 
Not with this combination of characters________________________ 
Rather small, with shiny-black thorax, very slender, dark palpus, 
denuded subcallus, and a cloud on wing in region of 
JAF‘ 5017 ee een ie Noches PEELS ea COM EEE Poe RE EE Sy reo pene Oe ee. A Eee 
Without this combination of characters_____________________ 
Basal portion of third antennal segment orange; cloud on wing 
1 1 6) peo eee RE ee ga EN PDI TCM Sere hinei Johnson, p. 124. 
Basal portion of third antennal segment predominantly black; 
cloud on wing distinct and extensive 
hinei var. wrighti Whitney, p. 125. 
Black species with tergites 1-3 and sternites 14 mostly orange, 
the others entirely black_______-___ cinctus Fabricius, p. 125. 
Abdomen nots ‘SO COlOTCE Sexi s a oe eek Se a ee 
Eye bare; abdomen not black, with a single median row of white 
tHiansles= ee ee a carolinensis Macquart, p. 126. 
Eye pilose, if pile indistinct, abdomen with a single median row 
Of; WHEE: “ERTAT SOS ee a 2 a ert ete ee ee 
Lintirely ;black, aneluding pal pus i= 5-25 Ss  eee 
Not Rentbinely® ‘plaice: s222 8 = et i ee ree nae Pee 
Subeallus denuded______________-- procyon Osten Sacken, p. 127. 
Subecatius pollinose: 2222-26-23 et ee ee ee 
Basal callus transverse, touching eyes; furcation and cross veins 
not margined with brown____~_ laniferus McDunnough, p. 151. 
Basal callus higher than wide, not touching eyes; furcation and 
cross veins margined with brown___sequaxz Williston, p. 128. 
Cross veins distinctly margined with brown, the spotting ob- 
vious; first tergite broadly orange laterally 
lasiophthalmus Macquart, p. 128. 
Cross veins not margined with brown, although furecation may 
have a spot, or, if cross veins are noticeably margined with 
brown, first tergite not broadly orange laterally_________-__ 
Abdomen broadly orange brown laterally; the median black area 
usually constricted on tergite 3; sublateral pale spots not 
CODSPICUOUSs2s6- 5 ee ee ee 
Abdomen not broadly orange laterally; if paler laterally, the 
median dark area is rather broad and not constricted on 
tergite 3; sublateral pale spots, if present, distinct and usu- 
ally with little if any orange brown around them___-__---_- 
Hind tibial fringe well developed, mostly orange or yellowish____ 
Hind tibial fringe weak, or, if well developed, largely black ____~ 
Length 18 mm or more; second palpal segment rather stout 
basally,;, Gwestern)=).= 3. =e californicus Marten, p. 129. 
91 
97 
102 
103 
116 
104 
106 
