Art. III.] 
Cockerell, New Mexico Bees. 
69 
Middle tarsi without any black pubescence. (Lone Mtn. 
near Silver City) . . . cardui^ Ckll., $ . 
4. Apical joint of middle tarsus of $ with a broad brush of 
black hair on each side, the whole shaped like the end 
of a peacock’s feather. (Mesilla Valley.) lesquerellce^ Ckll. 
Not so, ...... 5 
5. Small species, length less than 10 mm., . . . 6 
Large, over 10 mm., . . . . .7 
6. Eyes green ; clypeus broadly magined with yellow. (Me- 
silla Valley, Santa Fe, Embudo.) . maculifrons ^ Cress. 
Eyes dark purplish ; clypeus white in $ , black with a very 
narrow white apical stripe in 9* (Mesilla Valley ; the 
9 discovered April 29 by C. M. Barber.) . phenax, Ckll. 
7. 15 to 17 mm. long; entire body covered with short, dense, 
mouse grey to fulvous pubescence ; basal joint of hind 
tarsi of $ toothed within. (Santa Fe.) . occidentalism Cress. 
Abdomen not fasciate, the first and second segments, and 
sometimes more or less of the third, clothed with short 
ochraceous pubescence, the rest black or brownish. 
(Santa Fe.) .... boniboideSm Kirby. 
Abdomen not fasciate, the first and part of the second 
segments with ochraceous pubescence, the rest of the 
abdomen black. Large, robust species. Basal joint of 
hind tarsi of $ simple. (Organ Mts., Vega S. Jose.) 
. . . , . ursinus, Cress. 
Abdomen more or less fasciate. ... 8 
8. Abdomen with broad, entire, dense, yellowish-white hair- 
bands; thorax with mouse-grey hair intermixed with 
black. (Albuquerque, western base of Organ Mts., 
Canada Alamosa.) . urbanus. Cress., var. alamosanus, Ckll. 
Abdomen with narrow or weak hair-bands, . . 9 
9. Large, about 17 mm. long; abdomen with very narrow 
hair-bands ; clypeus of $ pale yellow ; eyes green. 
(Mesilla Valley.). .... affabilis, Cress 
About 13 or 14 mm. long; tip of fifth abdominal segment 
in 9 with dense black pubescence. (Vega S. Jose.) 
. montanus, Cress. 
12 mm. long; fifth abdominal segment in 9 covered with 
black hair. Differs from Cresson’s description of mon- 
tanus 9 in having mandibles not fulvous before apex, 
pubescence of thorax with black intermixed, apical 
margins of wings not at all dusky, outer side of tibiae 
clothed with silvery-white hair ; ^ with clypeus and 
sides of face yellow. (Mesilla Valley.) . vallorum, Ckll. 
A^ote . — The 9 of Icsquerellce is hard to distinguish from that of vallorunim 
but is rather larger, has rather shorter antennae, and flies earlier in the year, — 
in April. 
