Art. III.] 
Cockerell, New Mexico Bees. 
53 
About 4 mm. long, head very large, cheeks armed with a 
stout spine. (San Marcial, June, at fls. of Larrea.) 
. . . . larrece^ Ckll., 
Like lar 7 'e(E, but head not nearly so large. (Mesilla Valley, 
at fls. of Lar 7 ‘ea.) . . larrece^ var. modesta, Ckll., 
2. Extremely small, cheeks armed, mesothorax mostly green. 
(San Marcial, at fls. of Larrea) . marcialis, Ckll., 
Not so small, vertex with a black band from eye to eye, 
thorax with black markings, abdomen with distinct 
bands. (Mesilla Valley, at fls. of Mesquite.) 
. . . punciosignata, Ckll., 
Much like the last, but easily known by stigma, white ba- 
sally, otherwise occupied by a large black spot. (Me- 
silla Valley, at willow.) , . . fnaculigera, Ckll. 
3. Abdomen orange, or orange brown,' or pale brown, or fer- 
ruginous ; not banded, unless at base, . . 4 
Abdomen dark brown or black, or spotted, or banded, ii 
4. Head large, abdomen short and broad, ferruginous, mar- 
ginal cell obliquely truncate, mandibles bidentate ; 
head and thorax dark green. (Mesilla Valley, at fls. of 
Sphceralcea) ..... latior^ Ckll., 
Not so, . . . . . . .5 
5. Cheeks toothed beneath, legs entirely yellow. (Albu- 
querque, Mesilla Valley.) . pallidior^ yax. pulchrior, Ckll., $. 
Cheeks unarmed, . . . . . .6 
6. Face all dark, nervures colorless, abdomen orange. (Me- 
silla Valley, at fls. of Bigelovia^ Solidago and Gutier- 
rezia.) ..... semicrocea, Ckll., 9 • 
Face partly pale, ..... 7 
7. The pale color confined to clypeus and triangular marks 
at sides of face. (Albuquerque, Santa Fe, at fls. of 
Chamcesaracha.) . . . chameesaracha^ CkW.^ 9 * 
Face all light below antennae, . . . .8 
8. Vertex smooth and shining, .... 9 
Vertex distinctly granular, . . . .10 
9. Abdomen orange, head and thorax dark olive green, 
. . . seniicrocea^ Ckll., 
Abdomen light brown, head and thorax dark blue. (Me- 
silla, at fls. of Sida.) . . . . sides, Ckll., $ . 
10. Face very bright yellow, head and thorax green. (Embu- 
do, at fls. of Bigelovia.) . . rhodura, Ckll., 
Face yellowish-white, head and thorax dark blue, 
. . . chamasarachce, Ckll., 
11. Clypeus entirely dark (upper edge whitish in sidee 9 }) .12 
Clypeus not entirely dark, . . . .22 
12. Abdomen piceous with yellow spots or dots, legs with yel- 
low markings. (Santa Fe, July.) . sexmaculata,Q)Bi\, 9* 
Abdomen not spotted, .... 13 
