54 
PAN-PACIFIC ENTOMOLOGIST 
Proteriades. The peculiar, raised, tufted lobe of sternum 6 is characteristic 
of species of Proteriades, but its configuration varies among the species. 
Biology .—Pollen removed from the scopa of field-collected females was 
identified as Hydrophyllaceae (. Nama, Phacelia) —65.8%, Asteraceae ( Ma - 
lacothrix )—23.5%, and Fabaceae (. Lotus ?)—16.0%. All females had Aster¬ 
aceae pollens, but three females had most Hydrophyllaceae pollen and two 
females had mostly Fabaceae pollen. 
Key to Species of Hoplitina 
Males 
1. Apical margin of sternum 2 produced into a blunt spine or snout-like 
projection . 2 
Apical margin of sternum 2 round, without median projection .... 3 
2. Clypeus with large keel-like tubercle at base (Fig. 5); tergum 7 trun¬ 
cate apically; mid-coxa not flanged. bunocephala (Michener) 
Clypeus evenly convex; tergum 7 bilobed as in Fig. 1; mid-coxa with 
shiny flange. lindsdalei (Michener) 
3. Sternum 1 nearly flat; apical margin of sterna 3-4 strongly concave; 
vertex without appressed pubescence. 4 
Sternum 1 with large bulbous keel; apical margin of sternum 3 fairly 
straight; vertex with short appressed pubescence . 
. bullifacies (Michener) 
4. Apical margin of sternum 2 round, but not covering sterna 3-4; ter¬ 
gum 7 weekly excavated medially or truncate . 5 
Apical margin of sternum 2 expanded and covering sterna 3-4; ter¬ 
gum 7 strongly bilobed (Fig. 1), excavated areas wider than lateral 
arms. torchioi Parker 
5. Tergum 7 truncate apically. mojavensis (Michener) 
Tergum 7 with small U-shaped excision apically. 
. howardi (Cockerell) 
Females 
1. Clypeus without keel-like swelling at base . 2 
Clypeus with prominent keel-like swelling at base . 
. bunocephala (Michener) 
2. Clypeus uniformly punctured or surface shagreen; distance between 
lateral ocelli % distance of ocellocular area . 3 
Clypeus mostly impunctate, shiny (Fig. 7); distance between lateral 
ocelli greater than ocellocular distance. 4 
3. Clypeus flat, evenly pitted (Fig. 9), vertex without appressed pu¬ 
bescence . howardi (Michener) 
