44 Journal of Entomology and Zoology 
somewhat dusky, stigma and nervures pale sepia; abdomen orange- 
ferruginous, without markings above or below, hair at apex pale 
ochreous. 
Habitat: Claremont, California (Baker; Pomona coll. 227 
part). Unfortunately the habits of this remarkable bee are un- 
known. Glossoperdita could be considered a subgenus of Perdita, 
but it seems distinct enough to deserve generic rank. 
The other specimens collected by Baker at Claremont sent under 
227, are marked as from flowers of Rhus laurina. They consist of 
Perdita rhois Ckll., and a single male P. hypoxantha Ckll., the lat- 
ter presumably a stray, as the species is attached to A4denostoma. 
Also under 227 is a female of P. albipennis Cress., collected by 
Baker at Los Angeles, and bearing his number 691. 
Perdita ruficauda, sp. n. 
? Length about 5.5 mm., moderately robust, pubescence scanty; 
head and thorax dull olive green; head ordinary, inner orbits paral- 
lel; mandibles pale yellow suffused with reddish, the avex black; 
clypeus black, sparsely punctured, with a broad pale yellow median 
band, failing below; no supraclypeal mark; lateral marks pale yel- 
low, triangular, produced above, ending in a sharp point on orbital 
margin at level of antenne; flagellum pale fulvous beneath; tuber- 
cles yellow with a dark dot, and a pair of cuneiform yellow marks 
on upper border of prothorax; mesopleura shining; legs piceous, 
with anterior and middle knees, tarsi and tibie vellow. the latter 
dark behind: teoule pellucid; wings faintly reddish, stiama and 
nervures reddish-brown; stigma small and slender; marginal cell 
large, obliquely truncate at end; abdomen bright orange-ferruci- 
nous above and below, without markings, except a narrow dark 
stripe alone Jateral margins of second segment. Mouth-parts not 
especially elongated; labial palpi with first joint about 690 microns, 
the other three tomether about 290 microns. Maxillary palpi lone 
and well-developed. 
Habitat: Claremont. California (Baker; Pomona coll. 229, 
199). This suverficially resembles Glossoperdita. In my tables 
of Perdita it falls near P. chamaesarache, from which it is at once 
known by the face-marks and the palpi. 
