(1973) treats C. morosa as a superspecies with 4 
distinct species. Further splitting in the United 
States may be justified but only when reared ma- 
terial is available. 
8 (7). Orbit conspicuously widening toward lunule at 
level of upper ori C. (D. ) thompsoni (Frick) 
Synopsis. Frons twice width of eye, narrowly pro- 
jecting above eye in profile; orbit broad with 2 
ors, 3 ori; gena angular, at rear 0.20 height of 
eye; 3d antennal segment enlarged in male, without 
conspicuous pubescence; frons dull brown to 
blackish, orbit slightly paler, sometimes yellow- 
ish but frequently little differentiated from dark 
pleura; legs black, all knees bright yellow; ab- 
domen shining black; squama and fringe yellow; 
wing length 3. 2-3.4 mm; male genitalia with aedea- 
gus (fig. 599) having distal tubules rising 
vertically from mesophallus, curving ventrally at 
apex. 
Host/Early Stages. Iris versicolor and Typha sp. 
(Typhaceae). Larva feeding exclusively as leaf 
miner, mine continuing down to leaf base, where 
pupation takes place; gall develops around pupar- 
ium when growth is resumed in spring; puparium 
pale brown, slender, somewhat flattened, posterior 
spiracles each with 3 minute bulbs (contrast C. 
iridophora , fig. 602) . ~ 
Distribution. Illinois, Massachusetts, Michigan, 
New York, Pennsylvania; Canada. 
References. Claassen, 1918 (detailed discussion of 
biology, as Agromyza laterella ); Frick, 1959: 385; 
Spencer, 1969a: 124. 
Orbit scarcely widening C. (D. ) iridophora Spencer 
Synopsis. Head (fig. 600) with frons scarcely pro- 
jecting above eye; orbit with 2 ors and 3 ori; 
gena 0.125 height of eye; 3d antennal segment 
greatly enlarged in male with short pubescence, 
arista short, only slightly pubescent; frons dark, 
more brown behind, black in front; mesonotum matt 
black; tibiae and tarsi slightly paler, more 
brownish than black femora; abdomen black; squama 
and fringe yellow; wing length 2. 2-2.5 mm; male 
genitalia with aedeagus (fig. 601) having distal 
tubules rising vertically, with circular curva- 
ture at apex. 
Host/Early Stages. Iris sp. Larva forming ir- 
regular whitish leaf mine, pupating toward base of 
leaf; puparium dark brown, scarcely tapering, 
posterior spiracles arising from projecting base, 
each with 3 distinct bulbs, lower 2 curving lat- 
erally (fig. 602). 
Distribution. Florida; new record: Louisiana, 
Terrebonne Co., Houma, 1 m. , in Iris (no date or 
collector, AC). 
Reference. Spencer and Stegmaier, 1973: 66. 
9 (4). Frons 4 times width of eye 
103 
