SUBFAMILY CALLIPHORINAE 209 
35. Eye short; bucea 0.42 of eye height in male, 0.50 in female; 
width of parafaciale opposite lunule less than 0.70 
the distance between vibrissae; frontal width at vertex 
in male about 0.80 greater than at narrowest where it 
iespute U5 ol ead ewidth.«.{ Holarctic).. <5 «.r:e «'. 
hae La? Cynomya mortuorum (Linnaeus), p. 337 
Eye elongate; bucea 0.35 of eye height or less in both sexes; 
width of parafaciale opposite lunule greater than 0.80 
the distance between vibrissae; frontal width at vertex 
in male only about 0.60 greater than at narrowest 
where it is approximately 0.23 of head width (Nearctic) 
ee ictal ce A irate ad Cynomya hirta Hough, p. 339 
KEY TO KNOWN THIRD-INSTAR LARVAE OF 
CALLIPHORINAE* 
1. Accessory oral sclerite absent.................. Luciliini 2 
Accessory oral sclerite present.............. Calliphorini 8 
2. Pharynx without pigmented area below posterior extremity 
Per eCS COLIC Gr a mre ta eens.» .'. eek an Soe 3 
Pharynx with a prominent pigmented area below the 
posterior extremity of the ventral cornua............ 
PERE tes ote! 2 Lucilia illustris (Meigen), p. 228 
3. Dorsum of segment 11 posteriorly spinose.............. 4 
Dorsum of segment 11 posteriorly bare................ 
saath ee ee Phaenicia exinia (Wiedemann), p. 248 
4. Median pair of tubercles on upper border of stigmal field 
distinctly smaller:than..outer pair. ..........0s.e.0% +) 
Median pair of tubercles on upper border of stigmal field 
equal to or but slightly smaller than outer pair (anterior 
half of segment 12 smooth on dorsum and dorsolateral 
surface of segment 11 devoid of spines) (Cf. caerulei- 
viridis) ...... Phaenicia mexicana (Macquart), p. 246 
5. Inner tubercles on upper margin of posterior cavity separ- 
ated by a distance approximately equal to the distance 
between the inner and outer tubercles................ 6 
Inner tubercles on the upper margin of posterior cavity 
separated by a distance approximately equal to? the 
distance between the inner and median tubercles...... 
*Most of the following key to the larvae of Luciliini and the larval de- 
scriptions are modified from those of Knipling (1936). 
