126 Clarence E. Mickel 
14. 
is 
16. 
17. 
18. 
19. 
20. 
24. 
25- 
26. 
Scutellum marked with reddish; only the second tergite banded with 
yellow; clypeal lamella divided in the middle ......... flavofasciata 
Scutellum: markedMwithyellows. sissies ce bee en nee 15 
Clypeal lamella emarginate in the middle, practically divided; yellow- 
ish) enclosunel Stroneliv wus OSe apes citer errata rere compacta 
Clypeal lamella not emarginate in the middle ...... ST oo oS 16 
Propodeum largely yellowish; legs reddish; posterior orbits and two 
spots On, vertex. yellow, new accetankace soot een oe squamulif era 
Propodeum black; legs black, yellow and red; posterior orbits and 
vertex Sblack: 9c: %..ceic sts crash ete ime eam aia mandibularis 
Scutellum marked with yellow; usually a mark on first tergite .... 18 
Metanotutm only, swath tyellowet=.« slertemisterse i eerie ee erent eee 21 
Propodeum marked with yellow; second abdominal segment entirely 
PLC Mi iaieis crore vee wal eh tales iets eae eee ee ieee te eran intractibilis 
Propodeum sot. marked.with yellows i..<..4.c00 +5 s02s Sven cee eee 
Mesepisterna not toothed or ridged; narrow bands on all tergites; 
clypeal process small; enclosure smooth in middle .......... compar 
AAsiniall tooth: onstidee Oneinesepisteriiar -cerm o> otrlsteie cierto 20 
Large species, 12-13 mm.; broad yellow band on the second tergite; 
rather finely. punctate sts s:-cs fois aie oe ee aeacecuta enagcyaeetoteetae pleuralis 
Small species, 7-8 mm.; no band on third tergite; no yellow on inter- 
antennal ridge; very coarsely: ptinctate® <ivils is etisnns © kennicottt 
. Body very sparsely punctate and shining; clypeus with a low elevation 
almost) coming, toa point. femora splackien 11s tcrsesttisieiets ee nitida 
Body rather coarsely, punctate nd. seewiel elersii <i hick i oie ee eee 22 
2. Spot at base of mandibles, usually also on propodeum; markings white; 
enclosure striate all over; clypeal process emarginate in front, 
NIGrescens 
No spot at base of mandibles nor on propodeum ................. 23 
. Clypeal process short, narrower at apex than at base; yellow lateral 
spots on first tergite; rather broad emarginate band on second ter- 
IGEN), 5 ita “sis wiliene Sco wesc als cimBes ee UR ne ate te ats arc ee raga ET arbuscula 
Clypeal process not or but little narrowed in front ............... 24 
Angles of clypeal process sharply produced; enclosure strongly striate ; 
Spots) Of first abdominal-tersite (connate... -een sie sie dentifrons 
Clypeal process broad, angles not produced; spots on first tergite 
almost meeting; second tergite with a broad yellow band, widely 
and deeply emarginate; remaining tergites with narrow yellow 
bands: wings cblack. !.Ui..¢ 0 cccna aoe ead ee nea ates architis 
Wings wholly black; face with three transverse pale spots, metanotum 
yellow, scutellum immaculate, band only on second tergite; enclo- 
Stite broad ‘atid: SmiGOELM! yh 5 wie oon nis ets ea eatens aint amet fumipennis 
Wings, not wholly ‘black: ...9%e occas atisren Soles Meek pier dee eee 26 
Second -tergite of abdomen immaculate. 24282. 5.0605 secant insolita 
Second’ tergite of abdomen, banded 0 t... 24 ecm ns een eae 27 
444 
PSE 
