12 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 60 



antenna. Lower orbital cilia whitish, the minute upper cilia black 

 and descending to about upper third of the eye. 



Thorax dark, shining green, its silvery Avhite pollen confined to 

 a spot on each side near the humeri ; pleurae more black, with white 

 pollen. Abdomen with the two first and part of the third segment 

 green, the remainder dark coppery, last segment short, black. 

 Hypopygium (fig. 8) black; the outer lamellae triangular, yellowish- 

 broAvn; inner appendages small. 



All coxae and femora black. Fore and middle coxae with black 

 hair and bristles. Fore femora and tibiae with long, fine hair on 

 posterior surface, the hairs as long as the basitarsus; these hairs 

 appear black or reddish according to the light in wdiich they are 

 viewed. Middle femora with a row of stout hairs below, which are 

 longest in the middle, still none are as long as the width of the 

 femora ; they do not reach the base but extend to the tip ; hind femora 

 nearly bare below. Fore and middle tibiae yellow, rather short and 

 stout, of nearly equal length, middle ones with a row of short, stout 

 hairs below, which are longer near the tip. Hind tibiae black, 

 still they are a little yellow above at base, and sometimes the yel- 

 low extends nearly to their middle; their hair short. Fore and 

 middle tarsi brown, a little yellowish at base and black at tip, the 

 front ones longer than their tibiae and with their joints as 

 24—10-8-6-5. Middle tibia and tarsus with the joints as tibia, 56, 

 tarsi, 44-19-12-6-T. Hind tarsus with its joints as 25-22-16-10-8. 

 Calypters brown, their edge and cilia yellowish. Halteres yellow. 



Wings a little tinged witli brown ; third vein slightly bent back at 

 tip ; last section of fourth vein only a little bent at its middle, par- 

 allel with third near the tip, ending in the apex of the wing; last 

 section of fifth vein nearly twice as long as the crossvein. 



Female. — Face wide, gray; first antennal joint rather long, equal 

 to third in length; arista a little longer than the antenna; fore 

 coxae a little yellowish at tip. All femora and tibiae yellow, the pos- 

 terior femora and tibiae rather broadly black at tip; fore tarsi 

 almost wholly yellow, hind tarsi wholly black, with the first and 

 second joints of nearly equal length. Abdomen bright shining 

 green; last section of fourth vein more bent than in the male. 



Described from one pair taken by Dr. J. M. Aldrich at Redwood 

 City, California, April 7, 1906, and two males which I took at 

 Berkeley, California, May 16 and 18, 1915. 



Type and allotype. — Cat. No. 27037, U.S.N.M., from Redwood 

 City. 



7. ARGYRA SCUTELLARIS, new species 



Male. — Length, 5.6 mm. Face, front, and palpi velvety black; 

 face wide; palpi with black hair. Antennae (fig. 10) black; first 

 joint with numerous hairs on upper edge and four below; third 



