pleuron bright yellow; legs black, but foreknee 
bright yellow; squama and fringe yellow; wing 
length 1. 9-2.5 mm, discal cell small, with last 
section of M 3+4 1.5 times penultimate; male 
genitalia with aedeagus (fig. 610) having distal 
tubules distinctly enlarged at end. 
Host/Early Stages. Poa spp. (in Europe ]?. chaixii 
Vill., no specimens reared in North America). Pu- 
parium brownish, elongate, posterior spiracles 
with 3 bulbs, 2 upper bulbs wrapped around base of 
longer, lower one. 
Distribution. New record: North Carolina, Mitchell 
Co., Roan Mts., 6,300 ft, 1 m. , 13. VIII. 57 (J. G. 
Chillcott, CNC) ; Canada (as C. (D.) chaixiana 
Groschke), Europe. 
References. Spencer, 1969a: 115 (as jC. chaixiana) ; 
1978: 1; part 2, p. 282. ~ ~~ 
13 (11). Tergites 1-3 or 1-4 entirely yellow 14 
Tergites at most yellow laterally or narrowly 
yellow bordered 15 
14 (13). Tergites 1-3 conspicuously yellow; 3d antennal seg- 
ment in male not enlarged C. (D. ) bicolorata Spencer 
Synopsis. Frons black, twice width of eye, not 
projecting; orbit blackish gray, with 2 ors, 2 
ori; gena narrow, 0.10 height of eye; 3d antennal 
segment round, normal in both sexes; mesonotum 
blackish; legs black, only foreknee yellowish; 
abdomen conspicuously yellow on tergites 1-3, 
though sometimes darkened centrally; squama and 
fringe yellow; wing length 2.7-3 mm, last penulti- 
mate sections of M 3+4 approx, equal; male geni- 
talia with aedeagus as in figure 611. 
Host/Early Stages. Unknown. 
Distribution. North Carolina, Tennessee; Canada. 
Reference. Spencer, 1969a: 114. 
Tergites 1-4 conspicuously yellow; 3d antennal seg- 
ment in male enlarged C. (D. ) maclayi Spencer 
Synopsis. Head agreeing closely with that of (]. 
bicolorata but 3d antennal segment enlarged in 
male, frons slightly projecting and gena deeper, 
0.17 height of eye; mesonotum grayish black; legs 
black, with only foreknee yellow; squama and 
fringe yellow; wing length 2.5-3 mm, last section 
of M 3+4 slightly longer than penultimate; male 
genitalia with aedeagus (fig. 612) having distal 
tubules with only low curvature, distinctly en- 
larged at end. 
Host/Early Stages. Unknown. 
Distribution. California. 
Reference. Spencer, 1981: 196. 
15 (13). Inner margin of epandrium with prominent projection 
behind surstylus (fig. 614) C. (D. ) questa Spencer 
Synopsis. Frons brownish black, twice width of eye, 
only narrowly projecting; orbit deeper black, nar- 
rowly yellow along inner margin, 2 ors, 2 ori; gena 
angular, 0.17 height of eye; 3d antennal segment 
105 
