224 THE BLOWFLIES oF NortH AMERICA 
52 :368, 1928; Patton, Philippine Jour. Sci. 27:402, 1925; 
Malloch, Ann. and Mag. Nat. Hist. (9) 17:503, 1926; Linn. 
Soe. N. S. Wales, Proc. 52:320, 1927; Senior-White, Indian 
Mus. Ree. 28 :130, 1926; Richards, Roy. Soe., London, Trans. 
74 (2) :255, 1926; Townsend, Rev. Mus. Paul. 15:224, 1926; 
Lundbeck, Diptera’ Danica, vol. 7, p. 140, 1927; Rohdendorf, 
Ent. Mitt. 17 (4) :336-338, 1928; Wainwright, Roy. Ent. Soc., 
London, Trans. 76 :237, 1928; Séguy, Eneyl. Ent. (A) 9:145, 
1928; Aubertin, Linn. Soe. London Jour., Zool. 38 :389-436, 
1933; Patton and Cushing, Ann. Trop. Med. and Parasitol., 
28 (1) :107-121, 1934; Séeuy, Encyl. Ent. (B. II) Dipt. 
8:1384, 1935; Townsend, Manual of Myiology, vol. 2, p. 172, 
1935; ibid., vol. 5, p. 151, 1987. Genotype. Musca caesar 
Linnaeus by designation of Maequart (Insectes Diptéres du 
Nord de la France, vol. 5, p. 162, 1833). 
Male and female. Head (pl. 5, B) slightly longer at vibrissa 
than at antenna; oral margin protruding a little beyond vibrissal 
angle when viewed in profile; inner eye facets of male slightly 
enlarged; front of male very narrow, wide in female; ocellar tri- 
angle large in female, reaching nearly halfway to lunule; para- 
faciale narrowed above; elypeus moderately sunken; faciale 
slightly convex in profile especially toward vibrissa; antennal 
bases very slightly separated by a small and narrow carina; 
third segment of antenna reaching about five-sixths the distance 
to the vibrissa which is above the oral margin; arista with long 
cilia above and below nearly to apex; back of head flat or slightly 
concave above in profile, especially in male. 
Thorax with humeral bristles three; preintraalar bristles 
three; postalar declivity setose, postalar bristles two strong, with 
a weaker third bristle medianly beside the hindmost one; post- 
acrostichal bristles two; prosternum of medium size, wider an- 
teriorly, setose; intrapostalar bristle weak but present. 
Wing with subcostal sclerite with some short wiry bristles; 
posterior cross vein doubly arcuate; lower squamal lobe nearly as 
wide as long. 
Abdomen with marginal bristles only on third and fourth seg- 
ments; ventral membrane narrowly exposed in female. 
Lucilia illustris (Meigen) 
Musca illustris Meigen, Systematische Beschreibung der bekann- 
ten europadischen zweifltigeligen Insekten, vol. 5, p. 54, 1826. 
(Type, from Germany, apparently lost.) 
