14 
bo 
Or 
Or 
16. 
Annals Entomological Society of America PVok HV; 
Enclosure finely evenly striate; abdomen very slender, first segment narrow; 
usually but four or five teeth above on hind tibia............. imitatoria 
Enclosure more coarsely striate; abdomen broader, more coarsely punctate; 
Six toreight teethyabove Onvhihd Gilbid.-. oa, s6- orien eee clypeata 
FEMALES. 
Clypeus with an elevation or process with a free apical edge............... 2 
Clypeus without such elevation, although more or less swollen........... 29 
The clypeal process erect, and as long asibread... ; .\. che ie aeons eee 3 
ithe clypeal*process; broader thanvlone iormop erect... -)...- ea tn 7 
No yellow mark on first abdominal segment, and that on second not emar- 
ginate in front; enclosure longitudinally striate................. clypeata 
Some yellow on) first abdonmnall seementseren aerrr enone ra ett ee 
Pronotum red all across, yellow on scutellum and post-scutellum, abdominal 
segments broadly yellow, enclosure striate all over............... morata 
Pronotum black, with yellow spots, scutellum not marked with yellow..... 5 
Band on second abdominal segment not emarginate in front; enclosure finely 
striate land vonlywonuthersidese (an. set 4 te eee ene ent eee gnara 
Band on second abdominal segment strongly emarginate in front........... 
All femora blackish; no metanotal spots; segments beyond second hardly 
marked; basal joint of antenne black; enclosure mostly smooth. ...alaope 
Only fore femora partly blackish; spots on metanotum; all segments (except 
first) plainly banded; scape of antennze yellowish; enclosure mostly striate. 
prominens 
First, and often second, abdominal segments mostly reddish.............. 8 
Binsteabdonnunall sseement) [lately sce reer wer rte erste ye ee 13 
Enclosure transversely irregularly rugose; small species, head mostly black; 
stigmadark ‘row. coy si8s. cert Sele eae te eae etic etn 
Enclosure smooth, or punctate on sides; head mostly reddish; large species; 
stigma yellow neces of oer himacd Ress ear tue ea ale Rae ey ances meen 
Black beneath clypeal process; second segment and metanotum black..blakei 
Yellow beneath clypeal process; second segment and metanotum partly 
Tg 2(C (oh ts\ cee Ree EE ee ee eM PAIN aris cist date a ie aan 4/oe velo irene 
Clypeal process very broad, broadly and deeply concave in front......... 11 
Cly peal. process NOt sSOn i.e Foo ene Hoes an CANIS EE ee cieis eienens 12 
Lateral angles of clypeal process not much elevated; abdomen pale only on 
bases wines: dark. * toile 2 hes Os upon: Reta icnaet eRe ee ee ete bicornuta 
Lateral angles of clypeal process high, all abdomen pale; wings paler. .frontata 
Clypeal process. “truncate in front; face very hairy sss ee mimica 
Clypeal process convex in front, a tooth on each side at its base; face not 
especralllivy: Manny 2 -ccA ci % sake aheacre es UNS Suck Aa SILO Pa Se eee eect ampla 
Clypeal process acute; vertex all red, pronotum red across; metanotum 
nearly all red, enclosure smooth, scarcely punctate on sides; stigma 
arellllohy caee temaee tart een ns SAE fae Aer Anas Ae Wciaiid ao goo om ae vc firma 
Wertex and) pronotumi not alllmedi= s.n aaeon eee eee en eae 14 
From the tip of clypeal process, which is not much elevate hangs a thin 
lamella wstalllyardivace demi mance eee e are ene ier eee 
No: such: lamella sporesentt <2), 40)... ale sale ee as cae eee Ore en rete 17 
These lamella or plates very small not half the width of clypeal process, 
which is low; spots on scutellum, band on second abdominal segment very 
broad, not emarginate; enclosure smooth in middle, faintly striate on 
thexsides?:%.. ccehietm ern ke hae Saanniueetent a eek ees acitoric once robertsoni 
Lamelle reach almost wholly across the tip of clypeal process............ 16 
Clypeal lamella not emarginate in middle; spots on scutellum, none on post- 
scutellum; hind femora more or less blackish; enclosure mostly smooth. 
mandibularis 
Clypeal lamella emarginate in middle, practically divided; scutellum and 
post-scutellum both marked with yellow, hind femora (as well as most of 
others) yellowish; enclosure strongly rugose....-----. 2-2... compacta 
Scutellum marked with yellow; usually a mark on first abdominal segment. 18 
Post-scutellum tonly with, yellow. -.: oso omit erie erento tie etna 21 
