52 
Bulletin of Laboratories of Denison University [Voi. xi. 
Abdomen bright ferruginous. 
Calliopsis. 
(Mesilla Valley, at fls. 
of Spharalcea.) 
. semirufus^ Ckll. 
Abdomen dark, with or without light markings, ... i 
1. Face with light markings, . . . .2 
Face without light markings, abdomen with white bands. 
(Mesilla Valley.) . . . meliloti^ Ckll., . 9 
2. Abdomen with color-bands or spots, . . .3 
Abdomen without bands or spots, ... 5 
3. Clypeus only partly light, . . . *4 
Clypeus all light except the dots and edge, face densely 
bearded with white hair, . . a^lstra^ior^ 
4. Band on third abdominal segment always interrupted, 5th 
segment black, with neither band nor spots. (Albu- 
querque, Mesilla, at C/eome fis., &c.) . australior, Ckll., 9* 
Band on third segment usually entire, 5th segment largely 
pale. (Santa Fe, at fls. of Cleume.) . scitulus^ Cress. 9 • 
5. Females, ...... 6 
Males, ....... 7 
6. Clypeus yellow except two cuneiform black marks ; lateral 
face-marks going nearly to summit of eyes. (Santa 
F^, Embudo, Organ Mts.) . . coloradensis^ Cress. 
Clypeus with a longitudinal yellow mark or band on disk. 
(Santa Fe) .... rhodophilus, Ckll. 
7. Legs mostly black ; a black spot at tip of wing. (Mesilla 
Valley, at fls. of Spharalcea^) . . subalpinus^ Ckll. 
Legs mostly yellow ; no black spot at tip of wing. (Santa 
Fe, at fls. of Sphceralcea .) . . rhodophilus^ Ckll. 
Femora black, pale orange at apex ; tibiae all pale orange 
in front, largely black behind, tarsi yellow, the small 
joints becoming fuscous. , Differs from rhodophilus in 
being larger and more pubescent ; face-marks cream- 
color, lateral marksending in a point above ; eyes light 
chocolate color; no black spot at tip of wing. (Mesilla, 
Aug. 21.) . Jlaviprons, Smith, race coloratipes, n. race. 
Perdita. 
Yellow, without conspicuous markings, . . . . i 
Yellow or orange, with conspicuous dark markings, . . .2 
Head and thorax dark, with or without light markings, . . 3 
I. 8 mm. long, mesothorax pubescent, pleura with a black 
patch. (Mesilla Valley, Sept., at fls. of Verbesina.) 
. . . . . beata, Ckll. 
Not over 6 mm. long, pale yellow, pleura with a black 
patch. (Near Tularosa, Aug., at fls. of Mentzelia.) 
. . . . . ivootoncB^ Ckll. 
About the size of wootoncB, but very bright yellow, pleura 
without a black patch. (Mesilla Valley, Sept., at fls. 
of Bigelovia, ..... luteola^ Ckll. 
