12 ( 2 ). 
13 (12). 
14 (13). 
15 (14). 
acters from pale form of P. ranunculi , but ap- 
parently slightly longer, wing length from 3.1 
mm in male to 3.4 mm in female. 
Host/Early Stages. Unknown, probably Ranuncul- 
aceae. 
Distribution. California (mountains); new 
record: Wyoming, Albany Co., Centennial, 1 m. , 
no date (E. Fichter, D5-7, USNM) . 
Reference. Spencer, 1981: 403. 
Note. In specimen from Wyoming, distiphallus 
curves ventrally, not dorsally; it is not pro- 
posed to treat this as of specific significance 
but it may nevertheless indicate incipient 
speciation. 
1 notopleural bristle P. minutissima Spencer 
Synopsis. Head (fig. 1108) with frons distinct- 
ly projecting above eye, orange yellow; orbit 
broad, with 1 ors, 1 ori, orbital setulae lack- 
ing; gena extended at rear, 0.33 height of eye; 
1 st and 2 d antennal segments yellow, 3 d yel- 
lowish gray in male, black in female; mesonotum 
and scutellum ash gray; 2+1 strong dc , acr 
lacking; side of thorax largely gray; legs with 
coxae yellow, femora variable, yellow to gray; 
wing (fig. 1109) length 1.5-1. 9 mm, 2d costal’ 
section short, up to 1.33 times length of 4th; 
male genitalia with aedeagus (fig. 1110 ) short, 
membranous, distiphallus funnel shaped; sperm 
pump minute. 
Host/Early Stages. Unconfirmed, possibly Artem- 
^ Cfll i f ornica , on which many specimens were 
caught in California in April 1977 (KAS). 
Distribution. California. 
Reference. Spencer, 1981: 402. 
Note. It is possible that this species correct- 
ly belongs in the small palaearctic genus Pto- 
chomyza Hering (see Spencer, 1966c: 306; 1969b : 
24), but it seems preferable to retain it in 
Phytomyza at this time. 
2 notopleural bristles 13 
Side of thorax yellow (most of humerus, noto- 
pleuron, at least faintly, and at least upper 
3d of mesopleuron) ^4 
Side of thorax dark (except upper margin of meso- 
pleuron) 25 
3d antennal segment yellowish 15 
3d antennal segment black ig 
Hindmargin of eye black, both vt on black ground 
7 7 — m f laviantennalis Spencer 
Synopsis. Head (fig. 1111) with frons excep- 
tionally broad, 3 times width of eye, conspicu- 
ously projecting above eye, yellowish brown in 
front, yellow behind; 1 ors, 3 inclined ori, 
orbital setulae long, numerous in front; gena 
deeply extended at rear, almost equal to verti- 
cal height of small eye; broad epistoma pres— 
179 
