192 
Psyche 
[June 
closely and distinctly punctate to apex, apical margin truncate, 
crenulate, and only slightly projecting over base of labrum. Inner 
margins of eyes slightly convergent below; genae subequal in width 
to eyes in lateral view. Mandibles (Fig. 4) tridentate, long, nar- 
rowed medially. Mouthparts long; length of galea subequal to 
width of head; second segment of labial palp 1.5-1.7 times length 
of segment 1 ; third segment of maxillary palp longest, fifth segment 
slender. Antennae with flagellar segment 1 much longer than pedicel 
and subequal in length to segments 2 plus 3. Thorax robust, 
metanotum on posterior surface so that anterior part is lower than 
convexity of scutellum. Wings papillate distally. Metasoma (gaster) 
rather broad, length from dorsal margin of anterior concavity of 
first tergum 1. 0-1.3 times maximum widths punctures not distinct; 
terga 1-5 without impunctate margins. Anterior surface of tergum 
1 shallowly concave, impunctate, with longitudinal sulcus, sharply 
delimited from dorsal surface. Last visible (sixth) tergum concave 
in lateral view, impunctate rim slightly raised and shining; last 
visible (sixth) sternum unmodified. 
Male: Length 8.0-10.0 mm. Pubescence long, white in older 
specimens, in young specimens dorsally and laterally more orange 
than in females. Clypeus with long hairs. Mandibles (Fig. 5) 
bidentate. Antennal scape (excluding basal bulb) 2. 6-2. 7 times 
longer than broad; pedicel mostly exposed; first flagellar segment 
1. 35-1. 45 times as long as segment 2; flagellomeres flattened but 
segments not otherwise modified ; terminal flagellomere rounded 
(Fig. 3). Posterior coxae unmodified. Metasomal tergum 6 laterally 
toothed, apical margin irregularly sinuate medially; tergum 7 pro- 
jected to rounded truncate apex, with small teeth laterally (Fig. 6). 
Metasomal sterna 2-5 with low, transverse, submarginal swellings 
and without median projections; sternum 6 (Fig. 7) with bilobed 
median apical projection bearing dense patches of erect setae; sterna 
7 and 8 as in Figures 8 and 9. External genitalia as in Figures 10 
and 11. 
Position among the American subgenera of Hoplitis 
Michener (1947) has revised the American subgenera and species 
of Hoplitis. In an account of the megachiline bees of California, 
Hurd and Michener (1955) revised Michener’s key to the American 
subgenera, synonymizing 2 subgenera and including 2 taxa previously 
considered to be separate genera. In a numerical study of the 
American species in the Hoplitis complex of genera, Michener and 
