382 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loi 



Female. — Black, with tergum of abdomen dark blue-green. 

 Mandibles slightly reddened at apex. Flagellum slightly brownish 

 beneath. Tarsi more or less reddened, the claws ferruginous. 

 Tibial spurs pale testaceous, or rufotestaceous. Tegulae piceous, 

 becoming redder at apex. Wings strongly and uniformly dusky, 

 the stigma and nervures dark ferruginous. Head much broader 

 than long, with the malar space nearly obsolete. Facial foveae 

 rather narrow, extending slightly below antennae, covering about 

 half the space between eye and lateral ocellus, and separated 

 throughout from eye by a shining, minutely punctate space that 

 is about one-third as wide as the fovea itself. Mandibles nearly 

 normal, the explanate expansion on lower margin short and nar- 

 row. Labrum rounded at apex, the basal process about as long 

 as width of its apical truncation, the sides diverging toward base. 

 (In the Walnut Creek specimens the process is rounded at apex.) 

 Antennal joint 3 about as long as joints 4 to 6 combined. Middle 

 basitarsi moderately dilated and a little wider than the hind 

 basitarsi. Basal nervure meeting the nervulus, the stigma mod- 

 erately narrow. Second submarginal cell a little less than half as 

 long as the third and receiving the recurrent nervure at or a little 

 beyond the middle. Head and thorax granular-tessellate and dull. 

 Clypeus with fine, very close punctures, the frons strongly striate. 

 Mesoscutum with close, minute sharp punctures. Basal area of 

 propodeum small, with more or less radiating rugae at the base. 

 Pleura of propodeum delicately tessellate and shining. Abdomen 

 finely tessellate, rather shining, and with minute, rather close 

 punctures. Pubescence reddish fulvous, or ochreous, paler on the 

 face and beneath, and moderately dense on face and thorax. A 

 little black hair present at apex of scapes and on vertex be- 

 hind summit of eyes. Facial foveae dark seal brown, becoming 

 ochreous below in holotype when viewed from above. Floccus of 

 propodeum long and but little curled, the pleuron below the 

 floccus with a few scattered erect hairs. Abdomen sericeous with 

 fine, appressed light pubescence, becoming denser at the sides 

 of tergites 2 to 4, but not forming hair bands. Tergite 1 with 

 short, erect hair on lateral margins, its disk and disk of tergite 

 2, except apical part, nude. Apical fimbria pale fulvous brown. 

 Hair of legs pale ochreous, tinged with brown on outer side of 

 front and middle tibiae, on front tarsi, at apex of hind femora, 

 and on dorsal margin at base of hind tibiae. Flocculus of hind 

 trochanters long and rather thin. Scopa of hind tibiae moderately 

 compact, the hairs on dorsal margin plumose and about two-thirds 

 as long as greatest width of tibia, and the hairs of remainder 

 of scopa rather weakly plumose. Length 10-12.5 mm.; anterior 

 wing 8-9.2 mm. 



