136 Clarence E. Mickel 
Chamaecrista fasciculata, Helianthus sp. and Solidago canaden- 
Sis. 
_Cerceris nitida Banks. : 
1913. Cerceris nitida Banks, Bull. Amer. Nat. Hist., XXXII, p. 424. 
Females 1: Rulo, June 30, 1915 (L. Bruner). 
Eucerceris Cresson 
KEY TO THE SPECIES 
Females 
1. Middle or lateral lobes of clypeus produced, forming a tooth or cone 2 
Lobes of clypeus not produced, flat or slightly convex ............. 6 
2. Lateral lobes of clypeus produced, forming a stout tooth on each lobe 
perpendicular to the surface, body largely yellow ...... canaliculata 
Only the middle lobe of clypeus produced; body largely black and red, 
ot! black, ‘fed ‘and yellow: |. 2 aciehaides aaa cewek One eee 3 
3. Abdomen without yellow markings, first three abdominal segments 
more or less ferruginous, three apical segments black ....... bicolor 
Abdomen: with -yellow.markines: 3 ....32%0..2.d ccm Lauleitile oem eee 4 
4. Tergites finely and closely punctured; enclosure of propodeum strongly 
rugose; ground color of body varies from black to ferruginous, 
zonata 
Tergites sparsely punctured; enclosure of propodeum smooth, or more 
or less ‘transversely ‘and. obliquely ‘striate ...20. ce sca) aimee 5 
5. Sternites not marked with yellow; scutellum black; clypeus toothed at 
the apex, with a broad process between the teeth .......... rubripes 
Third and fourth sternites with yellow bands (sometimes interrupted) ; 
scutellum yellow; apex of clypeus toothed but no process between 
the SORT i rcahew singe tin aus cine Pa RS Se oe eee elegans 
6. Enclosure of propodeum shining, transversely striate; middle lobe of 
clypeus convex, toothed at apex; body coarsely but not densely 
purnicttited )). treo oo se fan ie ie a hala oe eee eee fulvipes 
Enclosure of propodeum opaque, punctate; middle lobe of clypeus flat, 
produced at apex; body finely and densely punctured ..... montana 
Males 
T.,econd cubital ‘cell petiolate >. Se ries seas ae tees See montana 
Second: cubitalccell<not ipetiolate. min asta eevee cer eee 2 
2. Thorax largely yellow and ferruginous; sternites three and four with 
a fringe of long, erect, curved bristles on the apical middle, and a 
row of short, erect, closely appressed bristles on apical middle of 
Stetmite Eve. foci) cv ed scene eee ee eee --..canaliculata 
454 
