Paragus. 49. 



are a little clavate about Ihe middle, and tlie hind metatarsi a little 

 thickened. The legs somewhat slightly yellow-haired, anterior femora 

 with longer hairs on tlie postero-ventral side, hind femora on the 

 antero-ventral side; the tibiæ with slightly longish hairs above, hind 

 tibiæ with a longer fringe. Wings hyaline; stigma brown. Squamulæ 

 and balteres pale yellow. 



Female. Frons black or æneous black, punctate, with yellow 

 hairs. The black stripe on epistoma generally broader than in the 

 male, sometimes only the extreme sides yellow, and even these may 

 be rather darkened. 



Length 4,2 to about 6 mm. 



As seen from the description this species varies somewhat with 

 regard to the colour of abdomen and hind tibiæ; the specimens with 

 red colour on the third segment and apex of abdomen answer to 

 sigillatus Curt. (Brit. Entom. 1835, 593) and trianguliferus Zett., while 

 the black specimens with quite yellow hind tibiæ answer to obscurus 

 Meig. The species does not seem to vary more in our country ; forms 

 as haemorrhous Meig. and aeneus Meig. I have not seen from Denmark. 



F. tihialis is not properly common in Denmark; Gandløse Ore 

 at Farum Sø, Hillerød, Rørvig; on Langeland at Lohals; in Jutland 

 at Holstebro, Hald, Søndervig and Frederikshavn, and on Bornholm 

 at Hasle. My dates are '^^Z« to the first part of August. It occurs in 

 sandy, somewhat sunny districts, flying low, near the ground. 



Geographical distribution: — The species is widely distributed, it 

 occurs over all Europe, towards the north to northern Sweden, and 

 in Finland; further it occurs in Asia Minor, North Africa and even 

 down to Kilimandjaro, on the Ganarian Islands and Madeira; and it 

 also occurs in North America. 



2. P. bicolor F. 



1794. Fabr. Ent. Syst. IV, 297, 71 (Syrphus) et 1798. SuppL 559, 8 

 (Mulio) et 1805. Syst. Antl. 186, 10 (Mulio). — 1822. Meig. Syst. Beschr. 

 III, 178, 2. - 1843. Zett. Dipt. Scand. II, 849, 1. — 1862. Schin. F. A. 

 I, 259. — 1901. Verr. Brit. Fl. VIII, 152, 2. — 1907. Kat. palåarkt. Dipt. 

 III, 2. — Paragus zonatus Meig. 1822. Syst. Beschr. III, 177, 1. — P. arciiatus 

 Meig. 1822. ib'id. III, 179,3, Tab. XXVII, Fig. 20, 21. — P. taeniatus Ue\g. 

 1822. ibid. III, 179, 4. — 1843. Zett. Dipt. Scand. Il, 850, 3. — P. testaceus 

 Meig. 1822. ibid. 180, 6. — P. pumtidatus Zett. 1838. Ins. Lapp. 617, 1, 

 et 1843. Dipt. Scand. II, 850,2, et 1859. XIII, 6033,2. — P. lacerus Loew, 

 1840. Programm Posen, 27,2, et 1840, Isis 544, 2. — 1862. Schin. F. A. 

 I, 258. — P. ruficauda Zett. Dipt. Scand. II, 852, 5. 



Male. Vertex black, generally yellow just at the tip; it is narrow, 

 but long, the eye-suture being quite short; it has short, yellow hairs; 



