From Ihe Lil rary of 

 J. M. ALDRICH 



Volucella. 401 



Tdble of Species. 



1 . Densely pilose species ; ground colour of abdomen extensively 



black ; scutellum without marginal bristles 1 . bombylans. 



— Short-haired species; abdomen not quite black; scutellum 



with marginal bristles 2. 



2. Abdomen black with second segment whitish 2. pellucens. 



— Abdomen yellow with black bands 3. inanis. 



1. V. bombylans L. 



1758. Linn. Syst. Nat. X, 591 et 1767. XII, 2, 983, 25 et 1761. Fn. 

 Suec. 1792 (Musca). — 1764. O. F. Mull. Fn. Fridrichsd. 710 (Musca). — 

 1775. Fabr. Syst. Entom. 762, 1 et 1805. Syst. Antl. 224, 4 {Syrphus). — 

 1816. Fall. Dipt. Suec. Syrph. 18, 3 {Syrphus). — 1822. Meig. Syst. Beschr. 

 III, 402, 1. — 1843. Zett. Dipt. Scand. II, 650, 3. — 1862. Schin. F. A. I, 

 329. — 1901. Verr. Brit. Fl. VIII, 483, 1, fig. 339. — 1907. Kat. palåarkt. 

 Dipt. III, 90. — Musca wystacea Linn. 1758. Syst. Nat. X, 591 et 1767. 

 XII, 2, 983, 26 et 1761. Fn. Suec. 1793. — 1764. O. F. Mull 1. c. 711. — 

 1775. Fabr. Syst. Entom. 762, 2 et 1805. Syst. Antl. 224, 5 {Syrphus). — 

 Musca plumata De Geer, 1776. Mém. Ins. VI, 134, 5, Tab. VIII, Fig. 4—9. 



— V. plumata 1822. Meig. 1. c. III, 403, 2. — 1843. Zett. 1. c. II, 648, 1 

 et 1849. VIII, 3110, 1 et 1855. XII, 4649, 1 et 1859. XIII, 5077, 1. — 

 F. vulpina Meig. 1830. 1. c. VI, 355, 7. — V. haemorrhoidalis Zett. 1838. 

 Ins. Lapp. 591, 2 et 1843. Dipt. Scand. II, 649, 2. 



Male. Vertex black or brownish black, palest at the anterior 

 angle; frons brownish behind, darker forwards. Epistoma yellowish 

 or brownish yellow on the front side, darker at the eye-margins and 

 brownish pruinose below the antennæ; the lower side parts are quite 

 black and shining, and likewise the jowls; the epistoma is hoUowed 

 below the antennæ, about in the middle there is a large central knob, 

 but below this epistoma is only slightly retreating, its lower part is 

 cone-shaped, produced much downwards and somewhat pointed. Vertex 

 has long, yellow hairs, frons shorter, likewise yellow hairs; epistoma 

 is densely yellow-haired on the front side, the sides have sparse, dark 

 hairs. Eyes densely haired with long, black hairs. Occiput black, 

 greyish pruinose, black-haired, the hairs long below and on the jowls, 

 Antennæ with the third joint elongate, at the upper margin nearly 

 three times as long as broad; the basal joints black, the third brownish 

 or yellowish; arista blackish, more or less brown in the basal part, 

 plumose with long hairs, longer above than below. Thorax black, 

 shining, densely pilose from erect, somewhat long hairs; there arenoto- 

 pleural and postalar bristles, and some bristles at the upper corner 

 of mesopleura, but they are not very conspicuous. The colour of the 

 pilosity of the body varies very much and the species is thereby 

 divided into two varieties. Var. homhylans: Thorax black-haired. Scutel- 



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