90 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



ARGE DENTIPES, new species. 



Much larger than victoria Kirby, which it resembles somewhat in 

 color. 



Female. — Length, 14 mm. Labrum broad, short, sparsely punc- 

 tured, the apical margin truncate; clypeus nearly flat, broadly, 

 shallowly, arcuately emarginate, the lateral angles rather sharp, 

 surface with distinct, rather close punctures; supraclypeal foveae 

 deep, elongate, oval, not connected with antennal fovea; antennal 

 furrows complete, broad; middle fovea sharply defined by ridges 

 laterally, open below, above with an oval-shaped depression; ocellar 

 depression rather small, but well defined; vertical furrows poorly 

 defined and present only anteriorly; postocellar furrow rather poorly 

 denned, curved; postocellar line slightly longer than ocellocular line; 

 face and front with distinct small punctures, closer on front; vertex 

 and cheeks shining almost impunctate; antenna distinctly thickening 

 apically; thorax and abdomen shining; third intercubitus with two 

 curves; recurrent veins parallel, the second half the length of second 

 intercubitus beyond it; nervulus distinctly before middle of cell; 

 four anterior femora with a tooth above at about the apical third; 

 posterior femora slender basally, suddenly enlarged dorsally at about 

 the middle; hind tibiae somewhat compressed apically. Head and 

 thorax deep metallic blue; abdomen beyond the propodeum rufo- 

 ferrugineous with sheath and median spots on first eight tergites 

 metallic blue; legs metallic blue; antennae black; wings dark brown 

 with a violaceous tinge; venation black; head, thorax, and legs with 

 short white hair. 



Type locality. — Lashio, Burma. 



Described from one female collected at an altitude of 3,000 feet 

 (about 909 meters), August, 1914, by Fletcher and forwarded by 

 the Imperial Entomologist of India. 



Type.— Cat. No. 22506 U.S.N.M. 



The unusual femora and central spots on the abdomen should 

 make it easy to recognize this species. It is difficult to tell how 

 much reliance should be placed on the tubercules on the four anterior 

 femora, as the anterior one on the left side is almost normal. The 

 sudden swelling of the posterior femora will, however, probably be 

 constant. 



Genus CIBDELA Konow. 



As far as known the species belonging to this genus are confined to 

 the oriental and the adjacent parts of the Palaearctic regions. All 

 of the known species are entirely metallic bluish or bluish green and 

 have the wings more or less dark. The species examined are closely 

 allied and while they can be distinguished comparatively easily by 

 comparison they are difficult to tabulate. The following key may be 

 of service in distinguishing the forms here treated. The only species 



