13. 
14. 
HES 
16. 
17. 
SUBFAMILY CHRYSOMYINAE 99 
Squamal lobes white, rarely orange or orange brown. (Neo- 
propneal er ealy Paralucilia fulvipes (Maequart), p. 157 
Mesonotum conspicuously flattened on dise; eyes in male dis- 
tinetly separated (except in several species of Apaulina) ; 
mesothoracie spiracle with dark hair (dark ee brown 
REED DOMLITIDC NUBIUILO ieee One, edd s basse) dads Hehe Wola «4 14 
Mesonotum convex; eyes in male very narrowly separated 
or contiguous; mesothoracie spiracle with bright orange 
naire Holarctic) .). Phormia regina (Meigen), p. 161 
Mesothoracie spiracle small, the propleural area not reduced; 
head not conspicuously elongate; cilia of arista long; api- 
eal cell open; hindmost preintraalar bristle present ..15 
Mesothoracie spiracle much enlarged, the size of the pro- 
pleural area reduced; head elongate; cilia of arista very 
short; apical cell closed in wing margin; hindmost pre- 
intraalar bristle absent (Holarctic).................. 
ee en ae Boreéllus atriceps (Zetterstedt), p. 170 
Preacrostichal bristles present, elongate; lower margin of 
head convex; head at vibrissa shorter than or as long as 
its length at antenna; upper squamal lobe without black 
setae above; three postintraalar bristles present; preintra- 
SATEEN: VS GRABS 9 Oh WETS 0h ee 16 
Preacrostichal bristles absent or vestigial; lower margin of 
head straight; length of head at vibrissa greater than at 
antenna; upper squamal lobe black setose above; two or 
three postintraalar bristles present; preintrapostalar bris- 
Teg WAT Tea ON al 2S A Pee a 2 ee ee 
..Protophormia terrae-novae (Robineau-Desvoidy ), p. 174 
Front wide in both sexes, in male at narrowest 0.14 or more 
of head width, in female 0.28 or more; parafaciale op- 
posite lunule wider than distance between vibrissae... 17 
Front in both sexes narrower, rarely exceeding 0.11 of head 
width in male, 0.26 of head width in female; parafaciale 
opposite lunule usually narrower than distance between 
WIDTISSAC S eoe i Her a: ple OF S22 Bu ee een oe er ae Ie 
Fore tibia with one posterior bristle; scutellum without api- 
eal bristles but with normal subapical bristles; outer for- 
ceps of male fully one-third to one-half as wide as 
HOEIIEES 20-3 5 Deve Eee) Blac AP GEREN Oe ER PIP ema SS pr 18 
Fore tibia with two posterior bristles; scutellum with apical 
bristles; outer forceps of male hardly one-fourth as wide 
SEMEN CO LCT GUE ear de alt) eras lnlde aoa sock Aa neem ea ate aes 
