COCKERELL— XR IV EUCERINE BEES 
lOI 
1905] 
The antennae are very much shorter than in J/. /ristis (Til. On account of the 
clypeal marking, this might be confused with Xenog/ossa pruiiwsa and A', angelica, 
but it is very easily known from these by the black tegulae and black hair on scut- 
ellum 
Three other specimens are numbered (Snow coll. ) 2026 (Oak Creek Canyon, 
.■\riz., 6000 ft. .-Vugust), 2027 (also Oak Creek Canyon) and 1053 (.-Vrizona); the 
last is much worn. These show that the species varies as follows: — 
Var. a. Thora.x above without black hair, except a very few ( probably not 
half a dozen) on posterior middle of mesothorax, the dark hair remaining at 
sides of vertex, however. Hair of fifth and sixth abdominal segments black. No. 
2026. 
^Tr. b. Black hair very distinct on scutellum; lower half of clypeus yellow, 
with a pointed process of yellow directed upwards in the middle line. No. 2027. 
War. c. Yellow of clypeus reduced to a small stripe, about one-third as long 
as width of clypeus. No. 1053. 
Me/issoiies ///pros/p/urfd, n. sp. 
9 Length about 1 2 to 13 mm ; breadth of abdomen about 5 mm., or slightly 
over, a rather large robust species, having about about the size, build, and 
pattern of abdominal banding of AL. ?>iarti>ii CkW., but the abdominal bands are 
creamy-tinted, and considerably broader; the pattern referred to consists of 
broad entire bands on segments 3 and 4, and 2 with an entire basal band, and a 
broadly interrupted median one, the lateral segments of the later pointed mesad, 
but not or hardly oblique. The basin of the first segment is covered with white 
tomentum (no dark intermi.xed ), and the fifth and sixth segments are co\'ered 
with black hair, long white hair showing at the extreme sides of the fifth; the 
hair of the venter is black, except quite at the sides, where it is white. Eyes 
reddish or grey; facial quadrangle a little broader than long: clypeus strongly 
and extremely densely punctured; mandibles with a brilliant orange apical stripe; 
antennae dark, Hagellum faintly reddish beneath; hair of face, cheeks and pleura 
white, of head and thorax above pale ochreous; vertex with some black hairs, 
especially behind ocelli; hind part of mesothorax with a large patch of black 
hair, disc of scutellum also covered with black; tegulae black, with pale ochrace- 
ous hair; wings smoky, nervures black; second s. m. very large and broad, 
oblique, receiving the first r. n. near the beginning of its last third; third t. c. 
bent, not angled; legs black; hair of femora dull white; of anterior and middle 
tibiae dull wliite, with nearly half the outer side (divided obliquely) black, and 
the short hair on the inner side of anterior tibiae black; hair of anterior and 
