1947] 
Cercericlce 
27 
greatest width; hind femora more than one-half 
black below complanata 
Clypeus evenly convex; white of clypens fully twice 
as broad as long ; apex of pygidium not one-half its 
greatest width, hind femora not so much black. 
vanduzeei 
4. Scape of antennae pale above and below; often two 
spots on vertex ; marks mostly white ; enclosure 
punctate on sides acantliopJiila 
Scape of antennae dark above 5 
5. Lateral face marks separated from clypeus by black ; 
enclosure with transverse striae vie reck i 
Lateral face marks reach yellow of clypeus 6 
6. Enclosure nearly cross-striate ; clypeal lobe short, 
truncate; face-markings yellowish; pale abdominal 
bands deeply indented with black ; yellow spots on 
venter minax 
Enclosure largely smooth, not cross-striate 7 
7. Enclosure smooth, no punctures; face with much 
white hair below ; clypeal lobe broadly emarginate 
in middle ; yellow of clypeus separated from lateral 
face marks by a black line ; pygidium not especially 
slender nor narrowed more than usual toward tip ; 
hair-lobes white, broad, partly on clypeus snowi 
Enclosure mostly smooth, but with some striae or 
punctures ; yellow of clypeus adjoins lateral face- 
marks 8 
8. Enclosure with rather hue oblique striae each side of 
median groove ; pygidium not particularly slender 
near tip ; clypeal margin scarcely elevated. 
hesperina 
Enclosure mostly smooth but fine transverse striae in 
upper part, the groove with lines across ; pygidium 
very slender and apical third more narrowed ; cly- 
peal margin plainly a little elevated convergens 
APIRATRIX MALES 
1. First and second segments entirely jet black, rest 
of abdomen with yellow bands ; hind legs almost 
