NEW AND LITTLE KNOWN BEES. 117 



Hah. Guayaquil, Ecuador (v. Buchwald ; Alfken coll. 7). 

 C. leporina, Sky., has a deeply sulcate 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 tumorifera the occipital mar- 

 gin is a long way from the ocelli, in bicarinata it is close to them. 



Coelioxys triodonta, sp. nov. 



<? . Length about 10 mm. ; black, with the tegulse, legs, under 

 side of abdomen (except bases of segments) and extreme sides of 

 abdomen more or less, all dark ferruginous ; antennae 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 

 coxae 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. leiicochrijsea, 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. 



Coelioxys costaricensis, sp. nov. 

 $ . Length about 10| mm. ; black, with the mandibles, apex of 

 labrum, tegulae, mesothorax (except a large posterior triangular area), 

 outer face of axilte, 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 antennae ; 

 antennae 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 

 modera^tely long, distinctly curved ; wings dilute fuscous, the apical 

 margin darker ; anterior coxae 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 



