98 Tur BLowFrures or NortH AMERICA 
Palpus elongate clavate; epistoma elongate but not much 
narrower than clypeus; front of male nearly obliterated at 
narrowest, 0.34 of head width in female; intrapostalar 
bristles present. Third-instar larva with well-defined ac- 
cessory: oral .sclerites.4 si) dssiecks |i.) Ga) ae 12 
9. Parafrontale with light hair anteriorly outside frontal row 
of bristles; male basicostal scale and legs yellow orange 
or orange brown and phallosome nearly straight; female 
occiput brown to black, and with one or two proclinate 
frontoorbital bristles seen sei ess 5s Siocon ee 10 
Parafrontale with dark hair anteriorly outside frontal row 
of bristles; male basicostal scale and legs usually black, 
phallosome bent ventrally and enlarged apically, the 
anterior gonapophysis deeply notched apically; female 
with occiput usually reddish orange to brown and rarely 
with proclinate frontoorbital bristles, (Nearctic and Neo- 
tVOp CA) oo s svncecs, 0 oGhie «lt = 5 dee atte eae ccs see 
Be eee Callitroga americana (Cushing and Patton), p. 125 
10. Fourth abdominal segment strongly pollinose laterally; male 
without frontoorbital or outer vertical bristles and an- 
terior gonapophysis without well-developed basal acces- 
sory. sclerite 0.0. oo. e a spilt bene oe 11 
Fourth abdominal segment nearly shining and with only a 
trace of pollen laterally; male with one reclinate fronto- 
orbital bristle opposite middle of ocellar triangle, with 
strong outer vertical bristles, and phallosome elongate, the 
apex narrow and reduced in size. (Neotropical) ........ 
MPRA codes OU ae BU ree Callitroga mimma (Shannon), p. 148 
11. Thorax usually bright metallic yellow to blue green, a mid- 
dorsal longitudinal stripe not extending over scutellum; 
female usually with two proclinate frontoorbital bristles; 
male phallosome of but moderate length, the apex well- 
developed. (Nearctic and Neotropical) ............... 
aipieo Mie eA Oe Callitroga macellarva (Fabricius), p. 138 
Thorax usually metallic dark blue to black, a mid-dorsal 
longitudinal stripe extending over scutellum; female with 
one proclinate frontoorbital bristle; male phallosome 
heavily sclerotized apically and projecting into well-de- 
fined hooks, the posterior gonapophysis large, elongate, 
and but weakly hooked anteriorly. (Neotropical) ...... 
is: bugetad Yo heen Callitroga aldricht (Del Ponte), p. 123 
12. Squamal lobes dark brown, almost black (Nearctic)...... 
: bps. > Ge et he eae Paralucilia wheelert (Hough), p. 153 
