22 PEOCEEDINGS OF THE NATIONAL MUSEUM vol.69 



0.23, and 0.25 of the head width. Parafrontals each about as wide 

 as the median stripe and distinctly shining black. Pollen develop- 

 ing toward the lower end as in the male; only one pair of vertical 

 bristles developed as in the male. Cheek about one-third the eye 

 height. 



Abdomen wholly shining black except a narrow silvery band at 

 base of segments 1 and 2. There are not so many erect discal bris- 

 tles and hairs as in the male. No trace of a piercing organ is visible. 



Length, of male 5.6-6.2 mm., female 4-6.4 mm. 



Described from four males (including type) and live females (in- 

 cluding allotype) collected at Suifu, Szechuen, China, bv Rev. D. C. 

 Graham. 



Type.— C&t. No. 28930. US. N.M. 



EUCOMUS, new genus 



A bright green species resembhng Gymnoch.<i€ta, ]:)ut with numerous 

 long hairs on the parafacials; eyes densely hairy, front narrow in 

 male, prominent below, face concave below, but its lower margin 

 projecting as much as at front. Facial ridges bearing several long 

 hairs above vibrissae, but the uppermost only at level of tips of 

 antennae; third antennal joint only a little longer than the second; 

 penultimate joint of arista short; palpi of usual length, but unusually 

 slender; proboscis slender and a httle elongated, but with well- 

 developed labella. 



Abdomen ^vith discals. Bend of fourth vein with abrupt curva- 

 ture but not appendiculate; veins bare except base of third; first 

 posterior cell open considerabl}' before the wing tip. 



Type of genus. — Eucoviils strictus, new species. 



EUCOMUS STRICTUS, new species 



2Iale. — Cheeks, back of head, thorax, and abdomen bright green; 

 front very narrow, at narrowest hardly more than twice the width 

 of anterior ocellus; frontal bristles reduced to hairs from this part 

 upward. Postocular cilia long and conspicuous; parafrontals and 

 parafacials with greenish tinge in certain directions, but somewhat 

 overlaid with rather dark poUen; the parafacial wider than the third 

 antennal joint. Antennae black, palpi yellow, rather dark at base. 

 Back of head flat with dense yellow hairs forming a distinct ruff, 

 between which and the eye there is only one row of hairs above, but 

 two or three below. Thoracic chaetotaxy: Acrostichal 3 (posterior 

 damaged); dorsocental 3, 3; humeral 4; posthumeral 2 ; presuturall; 

 notopleural 2; supraalar 3 (the middle one large); intraalar 3; post- 

 alar 2; sternopleural 2, 1; pteropleural 1 (smaller than sternopleural) ; 

 scutellum with three lateral pairs, apparently no apical, the discal 

 hairs erect, one pair bristly. Halteres with blackish knob; squamae 

 yellow, the posterior more brown, both with a yellow rim and fringe. 



