78 WM. H. ASHMEAD. 



4. Abdomen above highly convex ; mandibles with the outer tooth strong and 

 very acute, usually with a pencil of long ferruginous hairs before tips; 

 outer apical edge of tibiae acute ; clavvs long, acute, simple. 



Chalicodoma Lepel. 



Subfamily III. Anthidiin^. 



(The Potter Bees). 



The bees belonging here are always brightly colored or ornate, 

 and are at once distinguished from those in the two preceding sub- 

 families by having the second recurrent nervure uniting with the 

 radius beyond the second transverse cubitus or cubital cell, or at 

 most interstitial with the second transverse cubitus. In no species 

 that I have examined have I found a single specimen with the 

 second cubital cell receiving both recurrent nervures. 



All of the bees belonging here are also readily distinguished from 

 the others by their color being either black and rufous or rufous and 

 yellow, with the abdomen always banded or maculate with yellow, 

 white or rufous. 



The habits of the group, too, curiously enough, is also quite differ- 

 ent from the others. The female, normally, constructs a globular 

 cell, not unlike in appearance to that of an Eumenid, but much 

 smaller, attached to the stem of a plant, and made of a, waxy-like 

 substance and down stripped from pubescent or woolly-leafed plants. 



Only three genera have been recognized, distinguished as follows : 



Table of Genera. 



Second recurrent nervure joining the radius behind the second transverse 



cubitus. 2. 



Second recurrent nervure interstitial with the second transverse cubitus. 



Maxillary palpi 2-jointed ; labial palpi 4-jointed ; abdomen more or less 

 ornate with tufts or fascia- of white pubescence; the seventh segment 

 in % with a slender median spine and with two longer, stouter lateral 



spines Serapiw Smith. 



"i. Maxillary palpi 2-jointed ; labial palpi 4-jointed ; abdomen red or ferruginous, 

 not spotted or fasciate with yellow; % abdomen at apex tridentate. 



Euaspi* Gerst. 



Maxillary palpi 1-jointed ; labial palpi 4-jointed ; abdomen most frequently 



black, rarely ferruginous, fasciate or maculate with yellow, rarely 



ornate with white; % abdomen nearly always toothed or spined at 



apex \ lit hid in ill Fabr. 



Family X. STELID.E. 



(Parasitic Bees). 

 This family is composed of genuine parasitic bees, living — like 



