DIPTERA. 



8. Antenna; elongate, the first joint longer than the third ; front 



tarsi of female flattened conjuncta, Wiedem. 



First antennal joint short 9 - 



9. Yellowish species ; front with a more or less pronounced 



antenniferous projection, marked with a round black spot ; 

 front of female narrow above ; mesonotum (except the 

 sides) with its ground-colour black, but the black more 

 or less concealed beneath ochraceous pollen ; legs yellow, 

 the hind femora or tibise more or less brownish or 



blackish 10 - 



Species in great part black H* 



10. Black stripes of mesonotum conspicuous j very large species ; 



wings brownish-yellow pfoeoplera, Schiner, 



Black stripes of mesonotum inconspicuous, mostly concealed 

 beneath light pollen; smaller species ; wings more or less 

 hyaline distally /twda, Schiner. 



11. Face, the four anterior tibise, and the hind metatarsi light 



yellow j wings brown along the costa ; large species . . dolosa, sp. n. 

 Species not so marked 



12. Face projecting, yellow, with a black stripe; wings hyaline, 



with the subcostal (and costal, %) cells brown .... clavata, Fabr. 

 Face not projecting 



13. Tip of the hind metatarsi and the following joints yellowish- 



white; wings strongly blackish throughout (<J), or with 



the distal part behind subhyaline (?) lugubris, sp. n. 



Distal joints of hind tarsi not yellowish-white 14. 



14. Third and fourth abdominal segments each with two pairs of 



yellow dots, the anterior ones remote, the posterior pair 

 approximate ; legs wholly black ; wings brown at the base, 



hyaline ( <? ) or subhyaline distally (?) adspersa, Fabr. 



Species not so marked 15« 



15. Wings somewhat brownish in front ; abdomen with yellow 



bands ; mesonotum metallic bronze-green <enea, sp. n. 



Abdomen opaque and shining metallic, without yellow . . 16. 



16. Wings hyaline, with the subcostal cell brown ; second and 



third abdominal segments with a single triangular opaque 



spot, the fourth and fifth segments with three spots . . concinna ( ? ), sp. n. 

 Wings hyaline, with a narrow costal brown border reaching 



to the tip ; second abdominal segment with a single spot, 



the third and fourth segments with two opaque spots . . ccerulea, sp. n. 

 Wings brownish in front, subhyaline behind; abdominal 



segments opaque, with the margins shining; hind meta- 



tarsi blackish, the following joints yellow concinna ( £ ) , sp. n. 



