1922 ] 
Synopsis of Panurgidce 
165 
2. Metathorax shining, impunctate; tubercles yellow: head 
and mesonotum more sparsely punctured; veins darker; 
lp 7: 2; 6-7mm; oligolege of Heliantheae; Aug. 3 — Sept. 
28, labrosus. 
Metathorax opaque, punctate behind; tubercles dark; 
head and mesonotum more closely and coarsely punctured; 
veins paler; lp 6^: 3; 5-Gmm; oligolege of Heliantheae; 
Aug. 15 — Sept. 25 labrosiformis. 
3. Hind tarsi not yellow; 6-7mm, 5. 
Hind tarsi yellow; mp shorter than galea 4. 
4. Scutel shining, almost impunctate; mesonotum not tri- 
sulcate; enclosure of labrum more narrowed apicallv; 
wing clear hyaline; veins pale; scopa with long, long- 
barbed hairs; lp 8: 3; 6-7mm; oligolege of Heliantheae; 
May 29 — Sept. 5, albitarsis. 
Scutel more opaque, closely punctured; mesonotum tri- 
sulcate; enclosure of labrum less narrowed apicallv; 
wing less hyaline; scopa with short, short-barbed hairs; 
lp 7: 3; 5-7mm; oligolege of Astereae and Heliantheae; 
Aug. 11 — Oct. 4, solidaginis. 
5. Mesonotum nearly bare; shining, rather finely and closely 
punctured; scopa rather short; mp about equaling galea; 
lp 4: 1; oligolege of Astereae and Heliantheae; Aug. 23— 
Oct. 23 asteris. 
Mesonotum distinctly pubescent, 6 . 
6. Mesonotum entirely pubescent, opaque, with large shallow 
dense punctures; scopa rather short; mp about equaling 
galea; lp 4: l^; oligolege of Astereae; Sept. 6— Oct. 
29, compositarum. 
Mesonotum pubescent in front, shining, minutely and 
sparsely punctured; scopa long and thin; mp a little 
shorter than galea; lp 43^:2; oligolege of Heliantheae; Aug. 
1 — Sept. 12, rudbeckiae. 
