222 Syrphidae. 



much narrower and dull vertex, and the want of a peculiar, white 

 hair at the base of front femora. Meigen only knew the male; Verrall 

 records that in Meigen's collection stood a female along with the male, 

 but he does not think that it belonged to sticticiis; the female was 

 thus hitherto unknown. — If the above synonymi is certain the species 

 varies iii size; my specimens, which quite agree with Verrall's descrip- 

 tion, are 5,5 to nearly 6 mm, Meigen gives 2^2 lin., Verrall 6,5 mm. 

 Rondani 8 mm and Becker 7 — 8 mm. 



P. stidicus is very rare in Denmark, we have only four specimens, 

 three males and a female, one male taken at Nyraad near Vording- 

 borg on "/5 1908 and one at Lohals on Langeland on Vt 1909 (J. C. 

 Nielsen), and in 1914 I took, likev^ise at Lohals, a female on ^^h 

 and a male on ^'^li, both taken on the same place. 



Geographical distribution: — The species seems to be distributed 

 down into Italy; it is not known north of Denmark but occurs in 

 England; it is everywhere a rare species, only about eight specimens, 

 all males, were hitherto known ; with my four specimens we get thus 

 in all about a dozen, of which one female. 



10. Pypopliaena Schin. 



This genus is nearly allied to, and in most respects similar to 

 Platychims. The ocellar triangle is somewhat large and elongated 

 with the ocelli placed on its anterior half. The central knob and 

 lower part of epistoma moderately protruding. Epistoma entirely 

 black. The eye-facets in the male are very slightly enlarged above. 

 Scutellum æneous. Abdomen flat, a little narrow at the base, in- 

 creasing in breadth backwards, most in the female; it has the same 

 number of segments in both sexes as in Platychirus, and the small 

 genitalia are of the same shape; in the female the sixth segment is 

 often hidden. The abdomen has either extended reddish markings or 

 only one pair of spots. Legs without any special hairiness, and they 

 are upon the whole somewhat short-haired and especially there are 

 no longer hairs on anterior or antero-ventral side of hind femora. In 

 the male of one species the anterior tarsi are peculiarly dilatcd, in 

 the other species simple (the third species, pJatygastra Loew is only 

 known in the female sex); for the rest the legs are simple with no 

 such dilatation of front tibiæ as in Platychirus. Wings not long. as 

 long as or shorter than abdomen. 



The genus is distinguished from Platychirus and allied genera 

 especially by the shape of abdomen and its markings and the not 



