Pipiza. 83 



3. P. noctiluca L. 



1758. Linn. Syst. Nat. X, 593 (Musca). — 1805. Fabr. Syst. Antl. 

 247, 69 (Eristalis). — 1822. Meig. Syst. Beschr. III, 244, 6. — 1843. 

 Zett. Dipt. Scand. II, 826, 1 et 1849. VIII, 3180,1. - 1860. Malm, K. V. 

 och V. Samh. Goteborg Handl. VII, 62. - 1862. Schin. F. A. I, 262. — 

 1901. Verr. Brit. Fl. VIII, 168, 3, figs. 188—89. — 1907. Kat. palåarkt. Dipt. 

 III, 11. — P. ohsoleta Zett. 1838. Ins. Lapp. 616, 2 et 1843. Dipt. Scand. 



11, 828, 3. — r.Unotata Zett. 1838. 1. c. 616, 3 et 1843. 1. c. II, 829, 4. 

 — F. hijalipennis Zett. 1838. 1. c. 616, 4 et 1843. I. c. II, 831, 7. ~ 

 P. Uguttida Zett. 1838. 1. c. 616, 5. — P. vana Zett. 1843. 1. c. II, 835, 



12. — P. carhonaria var. b. Zett. 1843. I. c. II, 836,13. — P. stigmatica 

 Zett. 1859. I. c. XIII, 6029, 13 — 14. 



Male. Vertex, frons and epistoma black, the latter slightly pruinose ; 

 vertex yellow-haired, just in front with some black hairs; frons and 

 epistoma black-haired. Occiput black, slightly pruinose, the hairs 

 black above, downwards whitish, jowls chiefly black-haired ; the long 

 hairs at the top yeilow. Antennæ rather short, black, third joint very 

 slightly longer than broad, somewhat square but with the end rounded; 

 arista about as long as the antennæ, thickened in the basal half. 

 Eyes densely dark brownish-hairy, the hairs somewhat long. Thorax 

 black, shining, somewhat densely punctate; it is densely clothed with 

 somewhat long hairs which (seen from the side) are yellowish or 

 greyish white; on the sides and on pleura they are blackish, but 

 downwards again more greyish; they are longest on scutellum, especi- 

 ally at the margin. Abdomen black or æneous black, not much 

 shining as it is coarsely punctate ; on the second segment there are 

 a pair of fairly large, transverse, isolated, yellovv or reddish spots, 

 these may be smaller and more obscure, and sometimes quite wanting. 

 The abdomen is densely clothed with short, black hairs, longer at the 

 side margin and here with some pale hairs intermingled ; also at the 

 base there are long, partly pale hairs. Venter chiefly translucent, 

 shining, with somewhat long hairs, pale on the basal, black on the 

 apical part. Legs black, the tips of the anterior femora, and the 

 anterior tibiæ at the base yeilow or reddish; hind knees very slightly 

 reddish; tarsi dark or blackish brown, the two basal joints more or 

 less yellowish or brownish red, but on the hind tarsi often obscured, 

 especially above the first joint: sometimes also the third tarsal joint 

 is more or less pale. Hind femora somewhat thickened in about the 

 apical half, and hind metatarsi somewhat thickened. The femora have 

 long hairs arranged as usual, chiefly blackish on front femora but 

 pale on posterior femora, only black at the tip; tibiæ with short, 

 blackish hairs, longer and fringe-like above, longest on hind tibiæ; 

 the front ,tibiæ have yeilow, adpressed pubescence below, and the 



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