G2 
CHARLES ROBERTSONL 
apex of second and apical margins of following segments depressed, base of second 
and apical margins of 1-5 with narrow fascife of white pubescence. Length 
11 mm. 
% . — Resembles the female, pubescence longer, dense and yellow on face, base 
of second segment not fasciate. Length 8 — 10 mm. 
One female, ten males, taken from June 11th to September 20th, 
on flowers of Psoralea onobrychis, PasUnaca saliva, Ealophus ameri- 
eanus, Siam cicutoefolium and Polyyonum hydropiper. 
C. illiiioieiisis 9. — Black; clypeus rough, with a median longitudinal 
depression ; labrum bearing a tubercle, with a rounded pit on basal middle and 
faint depressions on the sides; mandibles black, rufo-piceous at tips; antenme 
black, prothoracic spines concealed by pubescence; thorax strongly, densely and 
evenly punctured, clothed with short, thick fulvous pubescence; metathorax 
with a transverse series of subquadrate pits on the disc, lateral faces of posterior 
plate reticulated ; wings hyaline, nervures and stigma black, tegulae dull testa- 
ceous; legs slender; abdomen rather sparsely and finely punctured on first and 
second segments, third and following segments more finely punctured, apical 
margins of segments depressed and bearing rather narrow' fascite of white pu- 
bescence. Length 10 mm. 
One female, taken September 6th, on flowers of Cnicus discolor. 
C. speciosa 9 . — Black ; clypeus finely and closely punctured, clothed with 
short pale pubescence ; labrum with a large median eminence bearing a deep pit, 
a shallow dej)ression on each side; mandibles rufous; flagellum testaceous be- 
neath ; thorax clothed with short, fine, dense, fulvo-ochraceous pubescence con- 
cealing the surface, disc of metathorax concealed by pubescence, lateral faces 
of posterior plate not reticulated ; wings hyaline, nervures, stigma and tegulfe 
pale testaceous; legs slender, clothed with pale pubescence, black, tarsi inclining 
to dull ferruginous; abdomen opaque, closely and very finely punctured, base of 
first segment with rather short, pale, fulvous pubescence, segments 1-5 with 
dense, even, apical fasciae of appressed yellowish white pubescence, sixth segment 
vvith black pubescence. Length 10 mm. 
One female, taken August 8th, on flowers of Eryngiuvi yuccrefolium. 
punctata — Black; labrum with a median groove and a shallow de- 
pression on each side, mandibles rufous, flagellum dull ferruginous beneath, the 
prothorax with a short spine on each side ; mesothorax closely and coarsely punc- 
tured, disc of metathorax with a series of large pits, lateral faces of posterior 
plate densely and coarsely punctured ; wings fulvo-hyaline, nervures, stigma and 
tegulse piceous; legs slender, dull ferruginous, tarsi pale; abdomen sbining, all 
of the segments closely and coarsely punctured, apical margins very strongly 
depressed, bearing fasciae of white pubescence. Length 11 mm. 
One male, taken July 6th, on flow'ers of Petalostemon violaceus. 
C. prodiicta 9 • — Black, clothed with pale pubescence; clypeus closely and 
strongly punctured, except at apex, which is shining and almost impunctate; 
labrum smooth and shining, without depressions; mandibles rufous, widely sepa- 
rated from eye; flagellum black; prothoracic spines short, mesothorax smooth 
