North-American Bees. 449 
tarsi fuscous ; abdominal bands broader and more ochraceous. 
Flagellum red beneath, except basally ; wings rather short, 
hyaline; tegule piceous, very hairy; last two abdominal 
segments fringed with purplish-black hair. Hasily known 
from other species of Xenoglossodes by the banded abdomen. 
Maxillary palpi with the:second joint hardly so long as the 
third ; fourth strictly cylindrical, hardly or not half length 
of third; fifth minute but very distinct, cylindrical, about or 
hardly half length of fourth, bearing a bristle at the end. 
Hab. Roswell, N. M., Aug. 20, 1902 (Cockerell). 
The following table will give some idea of the modifica- 
tions in the mouth-parts of the Eucerini :— 
Maxillary palpi 6-jointed ; last joint long 
PIG WARONY inponcobouE DODD COORUoouEGE a 
Maxillary palpi 5-jointed ; last joint dis- 
(TCE Paap eBa coe Den TOO Oe UOC 2. 
Maxillary palpi 4-jointed, with a terminal 
papilla representing the fifth usually 
TUG poh incurbonoeee eos oobeouee : 
1. Joint 6 much narrower than 5........ Synhalonia atriventris, Sm. 
Joint 6 scarcely narrower and almost as 
long as 5, but 5 conspicuously nar- 
ROW.CT: GAT Ae owe ons, 5: 0) nares See Guba S. crenulaticorns, Ckll. 
2. Maxillary palpi comparatively long and 
slender; jomt 5 always well de- 
veloped, cylindrical. (=<Xenoglossa.) 3. 
Maxillary palpi shorter, fifth joint smal- 
ler, sometimes very small. (=Xeno- 
GIMEROEES) ce dipemacuac ta ecepe do Cone 
8. Joint 5 conspicuously shorter than4 .. 4. 
Joint 5 long and narrow, nearly as long 
as 4; 4 narrower but not much 
shother thani-Biq «nse oe sie n° agit vug ops A. fulva, Sm., and 
X, patricia, Chil. 
4, Joint 4 about as long as 3; 5 long and 
MALTON MM aro a stats eet Make er agenete X, strenua, Cr. 
Joint 4 much shorter than 3; 5 not 
very long and narrow; palpus hairy.. X. prutnosa, Say. 
5, Joint 2 considerably longer than 3; 
5 very small, conical ...,.... Wey rn eee CUI (ON 
Joint 2 shorter or not longer thans .., 6. 
6, Joint 5 long-conical 2.2.62. 052se ees A, ertocarpt, Ckll. 
Joint 5.cylimdrical ......%....s008c0¢%, Av exeurrens, Ckil., and 
A, imitatrix, Cll, & Porter. 
7. Last joint long and cylindrical (possibly 
=4 and 5 fused), not very much 
shorter than 3; apex with two bris- 
tles ; no distinct papilla........... . Melissodes luteicornis, Ckl. 
Last joint much shorter than third..., 8. 
8, Last joint comparatively large, cylin- 
drical, more or less tapering apically . MW. menuacha, Cr., M, bi- 
maculata, Lep., and M. palhidicincta, Ckll, 
