NEW AND LITTLE KNOWN BEES. 115 
shining, hardly punctured hind margin of first abdominal segment. 
There are three submarginal cells. 
Hab. Falfurrias, Texas, on Helianthus, May 18th, 1907 
(A. C. Morgan). 
Exomalopsis frederici, sp. nov. 
g. Length about 84 mm., expanse 16; black, mandibles dark 
‘red except at base, tibize at apex, and the tarsi ferruginous; hair of 
head and thorax long and abundant, shining white on face, cheeks 
and under side of thorax, fulvous on head and thorax above, very 
bright on anterior half of mesothorax; flagellum obscure brown 
beneath ; vertex shining; ocelli large, in a scarcely curved line; 
mesothorax closely and distinctly punctured, except on disc posteriorly, 
where it is shining and sparsely punctured; base of metathorax with 
strong punctures and small shining spaces; tegule bright reddish- 
amber; wings clear, dusky at apex, stigma and nervures clear amber- 
colour; stigma large; b. n. going far basad of t. m.; second gs. m. 
broad, receiving first r. n. far beyond middle; legs with pale hair, 
fulvous on inner side of tarsi, middle and hind tibiz with dark fuscous 
hair on outer side; hind tibie thick, but legs otherwise ordinary ; 
abdomen shining, very finely punctured; hind margins of second and 
following segments with entire pale fulvous hair-bands, that on 
second narrow and submarginal; segments before the bands with fine 
short hair, only clearly seen in side view, that on second ochreous, 
on the others black; apex of abdomen broadly rounded, ferruginous. 
Hab. Mexico (F. Smith coll., 79, 22). British Museum. In 
Friese’s table of EHxomalopsis this runs to HL. planiceps, Sm., 
which differs conspicuously in the colour of the pubescence. 
The insect looks rather like a small Diadasia. The hind 
spur is strongly curved at end. 
Calioxys ardescens, Cockerell. 
Guayaquil, Kcuador, one male, one female (v. Buchwald ; 
Alfken coll. 6). These are quite identical with the Brazilian 
C. ardescens. ‘The female, not before known, is about 138 mm. 
long, and resembles the male except in the usual sexual 
characters. The last dorsal segment of abdomen is keeled, 
and ends obtusely; the last ventral is rather broad, and is 
narrowed, but not distinctly notched, before the end. The 
insect reminds one of C. otomita, Cress., from which it differs 
especially as follows :—Ridge between antenne high, extending 
down to clypeus, which is obtusely elevated in the middle (the 
lower edge of clypeus is shallowly emarginate); middle of 
mesothorax with sparser and smaller punctures; middle of 
apical margin. of clypeus much less angulate; last dorsal 
segment much broader apically; last ventral broader, and 
rather abruptly narrowed before the end. In Schrottky’s table 
of Brazilian species this female runs to C. pygidialis, Schrottky, 
but differs from it by the absence of a median tooth on scutellum 
and a ventral keel on abdomen. 
K 2 
