Carcelia. 377 



1. C. gnava Meig. 



1824. Meig. Syst. Beschr. IV, 330, 156 {Tachina) et 1838. VII, 255, 1 

 (Exorista) p. p. — 1862. Schin. F. A. I, 462 {Exorista). — 1900. Villen. Bull. 

 Soc. Ent. de Fr. 1900. 158, 9. — 1907. Kat. palåarkt. Dipt. III, 236. — 1912. 

 Villen. La Feuille des jeun. Nat. V, 42, 90. — 1921. Baer, Zeitschr. f. angew. 

 Ent. VII, 143. — Tachina Incorum Meig. p. p. 1824. 1. c. IV, 328, 154 et 1838. 

 VII, 256, 17 (Exorista). — Exorista proxima Meig. 1838. 1. c. VII, 257, 14. — 

 1862. Schin. F. A. I, 468. — 1900. Villen. 1. c. 159, 15. — Tachina excavata 

 Zett. 1844. Dipt. Scand. 1131, 128. — C. processioneae Stein, 1824. Arcli. f. 

 Naturgesch. 90, 6, 66, 8. 



Male. Frons above about half as broad as the eye; cheeks some- 

 what broad above, narrowing downwards. Orbits whitish grey, 

 cheeks more silvery, jowls grey; frontal stripe velvet black, as broad 

 as orbits. Frontal bristles descending at most to end of second antennal 

 joint. Vibrissæ quite slightly ascending. Orbits and jowls with black 

 hairs. Occiput grey, silvery along the eye-margin, with whitish 

 yellow hairs. Eyes with pale hairs. Antennæ black, somewhat greyish, 

 third joint about thrice as long as second; arista thickened in basal 

 half. Palpi yellow, Thorax blackish, slightly shining, bluish grey 

 pruinose, palest at the sides, with four black stripes, the median 

 abbreviated behind, the lateral broader, interrupted at the suture; 

 also a median black stripe visible; scutellum yellowish brown. Thorax 

 black-haired. Abdomen blackish, a little shining, with red side spots 

 over second and third segment, and sometimes just visible at front 

 margin of fourth; abdomen is greyish pruinose, with irregular dark 

 tessellations, shifting according to view, and with a dark middle 

 stripe and narrow hind margins. Abdomen black-haired; second 

 segment with a pair, third with four marginal bristles (sometimes 

 more). Fifth sternite small, nearly hidden; it is cleft to base, the 

 cleavage narrow at bottom, then widening broadly. Hypopygium 

 small; upper forceps elongated triangular, incised at base and with 

 long hairs; it is cleft in most of its length, the fissure widening in 

 the middle, but narrow at base and apex; arms of lower forceps 

 forming straight styles, obtuse at end, a little shorter than upper 

 forceps. Legs black with tibiæ and partly front tarsi yellowish, tibiæ 

 generally a little darkened at end; hind coxæ with small bristly 

 hairs behind at apex; front tibiæ with two posteroventral bristles 

 and middle tibiæ with generally two anterodorsal bristles or more, 

 and with a ventral bristle; hind tibiæ with an anterodorsal row of 

 bristles in which one long bristle. VV^ings nearly clear; veins brown, 



