3. OXYCERA S9 



10 (9) AntenntB barely half as long as the head, and with a subterminal 

 arista (fig. 111). 



(J 



Fig. 111.— Oxycera Morrisii 9- x 27. 



11 (20) Face more or less conspicuously black, on at least the middle. 



12 (13) Scutellum with only the tip yellow. 6 Morrisii. 



13 (12) Scutellum practically all yellow. 



14 (15) Abdomen yellow at the tip only. Wings without any darkening 



about the middle. 7 tcrminata. 



15 (14) Abdomen with side spots as well as the tip yellow. 



16 (17) Abdominal spots all united on the sidemargin. 8 pardalina. 



17 (16) Abdominal spots isolated. Eather large species. 



18 (19) Legs extensively yellow. 9 pulchella. 



19 (18) Legs nearly all black. 10 dives. 



20 (11) Face all (or nearly all) green or yellow. 11 trilincata. 



0. Jeonina is likely to occur in Britain and is closely allied to 0. ferminafa, but 

 has a pale spot at the base of the abdomen as well as one at the tip. 



1. O. analis Meigen. Cubital vein not forked. Abdomen with only 

 the tip yellow. Wings conspicuously darkened about the discal cell. 



A medium-sized species which is very easily distinguished 

 by the diagnostic characters. 



cj. Face and frons forming a small black almost equilateral triangle which is 

 moderately shining ; frons with a moderate middle depression ; face and 

 frons clothed all over with short inconspicuous, though not scarce dark 

 greyish pubescence, and this pubescence increases in length under the eyes to 

 the jowls (though the space under the eyes is very narrow), and it becomes 

 more conspicuous on the moderately puffed-out lower part of the back of 

 the head ; upper part of the back of the head reduced to a mere line against 

 the eyes, and with a dense short black postocular ciliation ; vertex black, 

 rather shining, long and pointed ; ocellar triangle and the adjoining part of 

 the occiput with some distinctly longer black pubescence ■ proboscis yellow. 

 Eyes touching for about one-third the distance between the occiput and the 

 antennas, clothed with obvious and leather dense black pubescence ; facets on 

 the upper part large and rather light brown, sharply separated from the 

 smaller dark brown facets on the lower part. Antennae dull black, rather 

 short, as even with the style included they are scarcely equal to half the 

 length of the eye ; style shorter than the annulated joint. 



Thorax and scutellum shining black and very densely punctate, with a 

 narrow yellow line running from the black humeri to the wing-base and with 



