NEW AND LITTLE KNOWN BEES. 117 
Hab. Guayaquil, Ecuador (v. Buchwald; Alfken coll. 7). 
C. leporina, Sky., has a deeply suleate clypeus, but is very 
different from bicarinata. Our insect is in many respects similar 
to C. tumorifera, Ckll., based on a male from Peru. There are, 
however, many differences ; thus in twmorifera the occipital mar- 
gin is a long way from the ocelli, in bicarinata it is close to them. 
Celioxys triodonta, sp. nov. 
$. Length about 10 mm.; black, with the tegule, legs, under 
side of abdomen (except bases of segments) and extreme sides of 
abdomen more or less, all dark ferruginous ; antennz black, the last 
two joints ferruginous basally; mandibles dark red; face narrow, 
densely covered with pale golden hair; hair on eyes short; cheeks 
with a smooth bevelled space below; hair of thorax yellowish, no 
distinct spots on mesothorax anteriorly ; mesothorax with very large 
punctures, well separated on disc posteriorly; scutellum short, 
strongly punctured, but smooth on each side of the delicate median 
keel, which leads to a prominent marginal tooth; axillar spines long, 
and nearly straight seen from above; wings dilute fuscous; anterior 
coxe with large red spines; spurs-red; abdomen shining, the hair- 
bands as usual, but weak; fifth segment with a red spine on each 
side; sixth with six large spines, and a very short and small, but 
distinct, median one; fourth ventral segment with two short dark 
spines close together ; fifth with a deep oval depression. 
Hab. Guayaquil, Ecuador (v. Buchwald; Alfken coll. 8). 
Very similar to C. leucochrysea, Ckll., also from Guayaquil, 
but leucochrysea has the face broader below, hair on eyes shorter 
and white (yellow in triodonta), last two antennal joints wholly 
black, median tooth of scutellum much less prominent, and 
axillar teeth shorter and more curved, no median apical tooth 
on abdomen, lower apical spines longer and more parallel. By 
the structure of the scutellum, C. triodonta is related to C. beroni, 
Sky., but the latter is much larger, and has no median apical 
tooth on abdomen. 
Celioxys costaricensis, sp. nov. 
?. Length about 104 mm.; black, with the mandibles, apex of 
labrum, tegule, mesothorax (except a large posterior triangular area), 
outer face of axillz, tubercles, mesopleura, under side of abdomen 
and marks on lateral margins (large areas on first segment), all red ; 
hair of eyes very short; mandibles strongly tridentate; labrum 
nearly twice as long as wide, with a deep basal pit; clypeus convex, 
densely rugosopunctate; no prominent keel between antenne ; 
antennse wholly black; the large punctures of mesothorax well 
separated on disc posteriorly; scutellum strongly punctured, with 
a smooth median keel, the hind margin conspicuously angulate, the 
end of the keel projecting as a small tooth; axillar teeth only 
moderately long, distinctly curved; wings dilute fuscous, the apical 
margin darker; anterior coxe with short spines, densely covered 
with white hair beneath; anterior margin of mesothorax with a 
narrow band of yellowish hair, but no patches; hind tarsi with 
