58 Syrphidae. 



Cl. 31, 1858, 299, Taf. II, Fig. 18). The larva is aphidiphagous on Aphides 

 on the roots of Pastinaca, Petroselinum etc. There are two generations 

 in the year. The eggs are deposited on the roots. The first genera- 

 tion appears in April and May, the second in July and August; the 

 larvæ of the second generation hibernate and pupate in March and 

 April. The larva is green when young, but becomes later on brown; 

 it is rough; the length is ca. 7 mm, and it has parallel sides. The 

 posterior spiracles lie on a small, cylindrical process. The pupa is of 

 a short drop-like shape, Goureau describes the larva and pupa, like- 

 wise of P. virens (Ann. Soc. Ent. de Fr. 4, VII, 1867, BuU. 86); the 

 larva was found feeding on Aphides on Elm and Poplar; they were 

 found from ^^le to "^/s, and the imagines came from ^/s to ^"/s. The 

 description of the larva agrees wilh that by Heeger, so that the species 

 is no doubt P. virens as said at the end of the note, though at the 

 beginning the author names the species Eumerus aeneus; this latter 

 lives, however, in quite another way (in onions). Wachtl mentions 

 (Wien. ent. Zeitg. I, 1882, 279) that P. Ueringi came in May from 

 galls of Schizoneura lanuginosa from the foregoing year, and concludes 

 that the larva feeds on this Aphid. 



The species of Pipizella occur in low herbage and on flowers on 

 commons, in fens and woods, both on dry and in more humid piaces; 

 they bear the abdomen hanging somewhat downwards. 



Of the genus about 6 species are known from the palæarctic 

 region ; 3 occur in Denmark. 



Tahle of Species. 



1. Upper marginal cross-vein not sloping much outwards, the 

 upper angle almost rectanguiar 2. 



— Upper marginal cross-vein starting rectangularly below, then 



bending angularly outwards, the upper angle acute 3. Heringi. 



2. Pubescence on hind tibiæ pale ; abdomen in the female 

 unspotted 1 . virens. 



— Pubescence on the hind tibiæ black; abdomen in the female 



with a pair of yellow spots 2. ftavitarsis. 



1. P. virens Fabr. 



1805. Fabr. Syst. Antl. 186, 12 (Mulio). — 1822. Meig. Syst. Beschr. 

 III, 253, 26 (Pipiza). — 1862. Schin. F. A. I, 260. — 1901. Verr. Brit. 

 Fl. VIII, 155, 1, figs. 179—80. — 1907. Kat. palåarkt. Dipt. III, 7. — 

 Pipiza cainpestris Fall. 1817. Dipt. Suec. Syrph. 59, 4. — 1843. Zett. Dipt. 

 Scand. II, 840, 19 et 1849. VIII, 3186, 19. — Pipiza tristis Meig. 1822. 

 Syst. Beschr. III, 253, et 1838. VII, 119, 33. — 1862. Schin. F. A. I, 265. 



— Pipiza varipes Meig. 1822. 1. c. 111, 254, 28. — 1843. Zett. Dipt. Scand. 

 II, 841, 21 et 1849. VIII, 3186, 21 et 1859. XIII, 6031, 21. — Pipiza 



