Myiolepta. 487 



could not find "die an der Larve deutlichen Stigmenhorner" ; I think 

 this is a confounding with the prothoracal pupal spiracuiar tubes 

 which he does not mention; these are, however, present and cannot 

 escape observation when the pupa is cleaned for the adhering material ; 

 the tubes are cylindrical, brown, nearly 0,5 mm long, directed upwards 

 and forwards and a Httle diverging; the pupa is 8 — 10 nmi long in 

 all, the tapering posterior part about 2 mm and the tube itself about 

 1 mm long. 



According to the observations the larva seems to feed on the 

 decaying wooden material, and they seem to hibernate. 



Remarks: It was said above that the genus may be allied to 

 Tropidia, but its place is doubtful on account of the medial cioss- 

 vein lying before the middle of the discai cell as in the Syvphinae -, 

 it will be seen that its larva shows some resemblance to the larva of 

 Tropidia (to judge from the puparium), but it differs in an important 

 point, as it has a telescopical posterior spiracuiar process; such a 

 posterior process is otherwise only found in the Enstalinae (and 

 Sericomi/ia), but is there much longer, and in Chrysogaster and A'go- 

 ascia; in these latter genera it is short, and the imagines of Chryso- 

 gaster, Neoascia and Myiolepta show also rather great similarity ; with 

 regard to Chrysogaster the shape of the epistoma with a central knob 

 in the male but without knob in the female is agreeing; on the other 

 hånd the shape of the frons in both sexes of this genus is very 

 different from Myiolepta ; Verrall says that if not belonging to the 

 Milesiinae the place of Myiolepta would be near Sphegina, it resembles 

 this genus in the slightly haired frons and bare epistoma, and this is 

 perhaps its most natural place, but there are, however, several 

 differences, and it must be noted that in Calliprobola among the 

 Milesiinae the larva has also a tail ; at present I shall therefore make 

 no alteration. 



Of the genus 5 palæarctic species are known; one occurs in 

 Denmark. 



1. M. luteola Gmel. 



1788. Gmel. Syst. Nat. V, 2879, 379 {Musca). — 1838. Newm. Entoni. 

 Mag. V, 373. — 1862. Schin. F. A. I, 325. — 1901. Verr. Brit. FL VIII, 

 573, 1, figs. 400—402. — 1907. Kat. palåarkt. Dipt. III, 122. — Thereva 

 duhia Fabr. 1805. Syst. Antl. 221, 14. — Eristalis lateralis Fall. 1817. 

 Dipt. Suec. Syrph. 41, 4. — Xylota lateralis 1822. Meig. Syst. Beschr. III, 

 224, 18. - 1843. Zett. Dipt. Sccnd. II, 880, 15. 



Male. Vertex and frons black, shining, the latter white pruinose 

 at the eye-margins ; epistoma white or silvery pruinose, on thé central 



k 



