Cerioides. 



589 



Of the genus 7 species occur in the palæarctic region, all belonging 

 to the Southern parts; only one, conopsoides goes towards the north 

 and is found in Denmark. 



1. C. conopsoides L. 



1758. Linn. Sysl. Nat. X, 590 et 1767. XII, 2, 982, 21 et 1761. Fn. 

 Suec. 1790 (Musca). — ? 1764. O. F. Mul). Faun. Fridrichsd. 709 (Musca). — 

 1822. Meig. Syst. Beschr. III, 160, 2, Tab. XXVI, Fig. 21—25 (Ceria). — 

 1843. Zett. Dipt. Scand. Il, 631, 1 et 1849. VIII, 3107, 1 {Ceria). — 1853. 

 Loew, Neue Beitr. I, 6, 1 (Ceria). — 1862. Schin. F. A. I, 369 (Ceria). — 

 1901. Verr. Brit. Fl. VIII, 665, figs. 456—457 (Ceria). — C. conopoides 

 1907. Kat. palåarkt. Dipt. III, 156. — Ceria clavicornis Fabr. 1794. Ent. 

 Syst. IV, 277, 1 et 1798. Suppl. 557, 1 et 1805. Syst. Antl. 173, 1. — 

 1804. Meig. Klass. eur. zweifl. Ins. I, 282, 1, Tab. XIV, Fig. 10—12 ?. — 

 1816. Fall. Dipt. Suec. Syrph. 6, 1. 



Male. Vertex black but the occiput behind it yellow, the extreme 

 anterior apex a little greyish pruinose; frons prolonged into a long 

 style, directed a little upwards and 

 bearing the antennæ ; the frons is 

 yellow, black at the base of the style 

 and the black coTour stretching as 

 a line across to the eye, the middle 

 line backwards to the upper angle 

 of the frons likewise black ; the style 

 is blackish on the middle, reddish 

 at base and apex and below ; epi- 

 stoma yellow, with a broad middle 

 stripe and all the lower lateral 

 parts black ; vertex and frons with 



very short, quite inconspicuous pale hairs, epistoma bare. Occiput 

 black, silvery pruinose just along the ey e-margins ; above and below 

 it is rather puffed out, and it is yellow above on the middle part 

 except just in the middle, where a black line from the vertex stretches 

 backwards ; the hairs are fine, inconspicuous and pale. Antennæ black, 

 flrst joint long, styliform, second and third joints shorter, forming 

 together an elongated oval body, bearing at the apex a short, conical 

 style; the third joint is velvet brown, the style yellowish. Thorax 

 black, densely punctate, dull ; the humeri are more or less yellow and 

 the postalar calli reddish ; scutellum is black with a yellow band across 

 just at the base; thorax and scutellum are clothed with exceedingly 

 short hairs, which are mostly pale. Pleura with a perpendicular, yellow 

 spot down the hind part of mesopleura and a roundish spot below 

 it on sternopleura; the hairs are very short, though slightly longer 



Fig. 201. Head of C. conopsoides ^. 



